重构键盘长按删除

CustomKeyboard/Utils/KBBackspaceLongPressHandler.h

@@ -0,0 +1,22 @@
+//
+//  KBBackspaceLongPressHandler.h
+//  CustomKeyboard
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface KBBackspaceLongPressHandler : NSObject
+
+- (instancetype)initWithContainerView:(UIView *)containerView;
+
+/// 配置删除按钮（包含长按删除与“立刻清空”提示）
+- (void)bindDeleteButton:(nullable UIView *)button;
+
+/// 触发“立刻清空”逻辑（可用于功能面板的清空按钮）
+- (void)performClearAction;
+
+@end
+
+NS_ASSUME_NONNULL_END

CustomKeyboard/Utils/KBBackspaceLongPressHandler.m

@@ -0,0 +1,475 @@
+//
+//  KBBackspaceLongPressHandler.m
+//  CustomKeyboard
+//
+
+#import "KBBackspaceLongPressHandler.h"
+#import "KBResponderUtils.h"
+#import "KBSkinManager.h"
+
+static const NSTimeInterval kKBBackspaceLongPressMinDuration = 0.35;
+static const NSTimeInterval kKBBackspaceRepeatInterval = 0.06;
+static const NSTimeInterval kKBBackspaceChunkStartDelay = 1.0;
+static const NSTimeInterval kKBBackspaceChunkRepeatInterval = 0.1;
+static const NSTimeInterval kKBBackspaceChunkFastDelay = 1.4;
+static const NSInteger kKBBackspaceChunkSize = 6;
+static const NSInteger kKBBackspaceChunkSizeFast = 12;
+static const CGFloat kKBBackspaceClearLabelCornerRadius = 8.0;
+static const CGFloat kKBBackspaceClearLabelHeight = 26.0;
+static const CGFloat kKBBackspaceClearLabelPaddingX = 10.0;
+static const CGFloat kKBBackspaceClearLabelTopGap = 6.0;
+static const CGFloat kKBBackspaceClearLabelHorizontalInset = 6.0;
+static const NSInteger kKBBackspaceClearBatchSize = 24;
+static const NSTimeInterval kKBBackspaceClearBatchInterval = 0.005;
+static const NSInteger kKBBackspaceClearMaxDeletes = 10000;
+static const NSInteger kKBBackspaceClearEmptyContextMaxRounds = 40;
+static const NSInteger kKBBackspaceClearMaxStep = 80;
+
+typedef NS_ENUM(NSInteger, KBBackspaceChunkClass) {
+    KBBackspaceChunkClassUnknown = 0,
+    KBBackspaceChunkClassWhitespace,
+    KBBackspaceChunkClassASCIIWord,
+    KBBackspaceChunkClassPunctuation,
+    KBBackspaceChunkClassOther
+};
+
+@interface KBBackspaceLongPressHandler ()
+@property (nonatomic, weak) UIView *containerView;
+@property (nonatomic, weak) UIView *backspaceButton;
+@property (nonatomic, strong) UILongPressGestureRecognizer *longPress;
+@property (nonatomic, assign) BOOL backspaceHoldActive;
+@property (nonatomic, assign) NSTimeInterval backspaceHoldStartTime;
+@property (nonatomic, assign) BOOL backspaceChunkModeActive;
+@property (nonatomic, assign) BOOL backspaceClearHighlighted;
+@property (nonatomic, assign) NSUInteger backspaceHoldToken;
+@property (nonatomic, assign) BOOL backspaceHasLastTouchPoint;
+@property (nonatomic, assign) CGPoint backspaceLastTouchPointInSelf;
+@property (nonatomic, assign) NSUInteger backspaceClearToken;
+@property (nonatomic, strong) UILabel *backspaceClearLabel;
+@end
+
+@implementation KBBackspaceLongPressHandler
+
+- (instancetype)initWithContainerView:(UIView *)containerView {
+    if (self = [super init]) {
+        _containerView = containerView;
+    }
+    return self;
+}
+
+- (void)bindDeleteButton:(UIView *)button {
+    if (self.backspaceButton == button) { return; }
+
+    if (self.longPress && self.backspaceButton) {
+        [self.backspaceButton removeGestureRecognizer:self.longPress];
+    }
+    self.backspaceButton = button;
+    self.backspaceHoldActive = NO;
+    self.backspaceChunkModeActive = NO;
+    self.backspaceClearHighlighted = NO;
+    self.backspaceHasLastTouchPoint = NO;
+    self.backspaceHoldToken += 1;
+    [self kb_hideBackspaceClearLabel];
+
+    if (!button) { return; }
+
+    self.longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                   action:@selector(onBackspaceLongPress:)];
+    self.longPress.minimumPressDuration = kKBBackspaceLongPressMinDuration;
+    self.longPress.allowableMovement = CGFLOAT_MAX;
+    self.longPress.cancelsTouchesInView = YES;
+    [button addGestureRecognizer:self.longPress];
+}
+
+- (void)performClearAction {
+    [self kb_clearAllInput];
+}
+
+#pragma mark - Long Press
+
+- (void)onBackspaceLongPress:(UILongPressGestureRecognizer *)gr {
+    UIView *hostView = [self kb_hostView];
+    if (!hostView) { return; }
+    if (gr) {
+        self.backspaceLastTouchPointInSelf = [gr locationInView:hostView];
+        self.backspaceHasLastTouchPoint = YES;
+    }
+    switch (gr.state) {
+        case UIGestureRecognizerStateBegan: {
+            self.backspaceHoldToken += 1;
+            NSUInteger token = self.backspaceHoldToken;
+            self.backspaceHoldActive = YES;
+            self.backspaceHoldStartTime = [NSDate date].timeIntervalSinceReferenceDate;
+            self.backspaceChunkModeActive = NO;
+            [self kb_setBackspaceClearHighlighted:NO];
+            [self kb_hideBackspaceClearLabel];
+            [self kb_backspaceStepForToken:token];
+        } break;
+        case UIGestureRecognizerStateChanged: {
+            [self kb_handleBackspaceLongPressChanged:gr];
+        } break;
+        case UIGestureRecognizerStateEnded:
+        case UIGestureRecognizerStateCancelled:
+        case UIGestureRecognizerStateFailed: {
+            [self kb_handleBackspaceLongPressEnded:gr];
+        } break;
+        default: break;
+    }
+}
+
+#pragma mark - Delete Steps
+
+- (void)kb_backspaceStepForToken:(NSUInteger)token {
+    if (!self.backspaceHoldActive) { return; }
+    if (token != self.backspaceHoldToken) { return; }
+    UIResponder *start = (UIResponder *)([self kb_hostView] ?: self.backspaceButton);
+    UIInputViewController *ivc = KBFindInputViewController(start);
+    if (!ivc) { self.backspaceHoldActive = NO; return; }
+    id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
+    NSString *before = proxy.documentContextBeforeInput ?: @"";
+    NSTimeInterval elapsed = [NSDate date].timeIntervalSinceReferenceDate - self.backspaceHoldStartTime;
+    NSInteger deleteCount = 1;
+    if (before.length > 0) {
+        deleteCount = [self kb_backspaceDeleteCountForContext:before elapsed:elapsed];
+    }
+    if (!self.backspaceChunkModeActive && elapsed >= kKBBackspaceChunkStartDelay) {
+        self.backspaceChunkModeActive = YES;
+        [self kb_showBackspaceClearLabelIfNeeded];
+    }
+    for (NSInteger i = 0; i < deleteCount; i++) {
+        [proxy deleteBackward];
+    }
+
+    NSTimeInterval interval = [self kb_backspaceRepeatIntervalForElapsed:elapsed];
+    __weak typeof(self) weakSelf = self;
+    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
+                                 (int64_t)(interval * NSEC_PER_SEC)),
+                   dispatch_get_main_queue(), ^{
+        __strong typeof(weakSelf) selfStrong = weakSelf;
+        [selfStrong kb_backspaceStepForToken:token];
+    });
+}
+
+- (NSTimeInterval)kb_backspaceRepeatIntervalForElapsed:(NSTimeInterval)elapsed {
+    if (elapsed >= kKBBackspaceChunkStartDelay) {
+        return kKBBackspaceChunkRepeatInterval;
+    }
+    return kKBBackspaceRepeatInterval;
+}
+
+- (NSInteger)kb_backspaceDeleteCountForContext:(NSString *)context elapsed:(NSTimeInterval)elapsed {
+    if (elapsed < kKBBackspaceChunkStartDelay) {
+        return 1;
+    }
+    NSInteger maxCount = (elapsed >= kKBBackspaceChunkFastDelay)
+                         ? kKBBackspaceChunkSizeFast : kKBBackspaceChunkSize;
+    return [self kb_backspaceChunkDeleteCountForContext:context maxCount:maxCount];
+}
+
+- (NSInteger)kb_backspaceChunkDeleteCountForContext:(NSString *)context maxCount:(NSInteger)maxCount {
+    if (context.length == 0) { return 1; }
+
+    static NSCharacterSet *whitespaceSet = nil;
+    static NSCharacterSet *asciiWordSet = nil;
+    static NSCharacterSet *punctuationSet = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        whitespaceSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
+        asciiWordSet = [NSCharacterSet characterSetWithCharactersInString:
+                        @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_"];
+        punctuationSet = [NSCharacterSet punctuationCharacterSet];
+    });
+
+    __block NSInteger deleteCount = 0;
+    __block KBBackspaceChunkClass chunkClass = KBBackspaceChunkClassUnknown;
+    [context enumerateSubstringsInRange:NSMakeRange(0, context.length)
+                                options:NSStringEnumerationByComposedCharacterSequences | NSStringEnumerationReverse
+                             usingBlock:^(NSString *substring, __unused NSRange substringRange, __unused NSRange enclosingRange, BOOL *stop) {
+        if (substring.length == 0) { return; }
+        KBBackspaceChunkClass currentClass = KBBackspaceChunkClassOther;
+        if ([substring rangeOfCharacterFromSet:whitespaceSet].location != NSNotFound) {
+            currentClass = KBBackspaceChunkClassWhitespace;
+        } else if ([substring rangeOfCharacterFromSet:asciiWordSet].location != NSNotFound) {
+            currentClass = KBBackspaceChunkClassASCIIWord;
+        } else if ([substring rangeOfCharacterFromSet:punctuationSet].location != NSNotFound) {
+            currentClass = KBBackspaceChunkClassPunctuation;
+        }
+
+        if (chunkClass == KBBackspaceChunkClassUnknown) {
+            chunkClass = currentClass;
+        } else if (chunkClass != currentClass) {
+            *stop = YES;
+            return;
+        }
+
+        deleteCount += 1;
+        if (deleteCount >= maxCount) {
+            *stop = YES;
+        }
+    }];
+
+    return MAX(deleteCount, 1);
+}
+
+- (NSInteger)kb_clearDeleteCountForContext:(NSString *)context
+                               hitBoundary:(BOOL *)hitBoundary {
+    if (context.length == 0) { return kKBBackspaceClearBatchSize; }
+
+    static NSCharacterSet *sentenceBoundarySet = nil;
+    static NSCharacterSet *whitespaceSet = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sentenceBoundarySet = [NSCharacterSet characterSetWithCharactersInString:@".!?;。！？；…\n"];
+        whitespaceSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
+    });
+
+    NSInteger length = context.length;
+    NSInteger end = length;
+    while (end > 0) {
+        unichar ch = [context characterAtIndex:end - 1];
+        if ([whitespaceSet characterIsMember:ch]) {
+            end -= 1;
+        } else {
+            break;
+        }
+    }
+    NSInteger searchEnd = end;
+    while (searchEnd > 0) {
+        unichar ch = [context characterAtIndex:searchEnd - 1];
+        if ([sentenceBoundarySet characterIsMember:ch]) {
+            searchEnd -= 1;
+        } else {
+            break;
+        }
+    }
+
+    NSInteger boundaryIndex = NSNotFound;
+    for (NSInteger i = searchEnd - 1; i >= 0; i--) {
+        unichar ch = [context characterAtIndex:i];
+        if ([sentenceBoundarySet characterIsMember:ch]) {
+            boundaryIndex = i;
+            break;
+        }
+    }
+
+    BOOL boundaryFound = (boundaryIndex != NSNotFound);
+    NSInteger deleteCount = length;
+    if (boundaryIndex != NSNotFound) {
+        deleteCount = length - (boundaryIndex + 1);
+    }
+    deleteCount = MAX(deleteCount, 1);
+    if (hitBoundary) {
+        *hitBoundary = boundaryFound;
+    }
+    return MIN(deleteCount, kKBBackspaceClearMaxStep);
+}
+
+#pragma mark - Long Press State
+
+- (void)kb_handleBackspaceLongPressChanged:(UILongPressGestureRecognizer *)gr {
+    if (!self.backspaceHoldActive) { return; }
+    NSTimeInterval elapsed = [NSDate date].timeIntervalSinceReferenceDate - self.backspaceHoldStartTime;
+    if (elapsed < kKBBackspaceChunkStartDelay) { return; }
+    [self kb_showBackspaceClearLabelIfNeeded];
+    UIView *hostView = [self kb_hostView];
+    if (!hostView) { return; }
+    CGPoint point = [gr locationInView:hostView];
+    self.backspaceLastTouchPointInSelf = point;
+    self.backspaceHasLastTouchPoint = YES;
+    BOOL inside = [self kb_isPointInsideBackspaceClearLabel:point];
+    [self kb_setBackspaceClearHighlighted:inside];
+}
+
+- (void)kb_handleBackspaceLongPressEnded:(UILongPressGestureRecognizer *)gr {
+    BOOL shouldClear = self.backspaceClearHighlighted;
+    if (!shouldClear) {
+        UIView *hostView = [self kb_hostView];
+        CGPoint point = CGPointZero;
+        if (gr && hostView) {
+            point = [gr locationInView:hostView];
+        } else if (self.backspaceHasLastTouchPoint) {
+            point = self.backspaceLastTouchPointInSelf;
+        }
+        shouldClear = [self kb_isPointInsideBackspaceClearLabel:point];
+    }
+    self.backspaceHoldActive = NO;
+    self.backspaceChunkModeActive = NO;
+    self.backspaceHoldToken += 1;
+    self.backspaceHasLastTouchPoint = NO;
+    [self kb_hideBackspaceClearLabel];
+    if (shouldClear) {
+        [self kb_clearAllInput];
+    }
+}
+
+#pragma mark - Clear Label
+
+- (void)kb_showBackspaceClearLabelIfNeeded {
+    UIView *hostView = [self kb_hostView];
+    if (!hostView || !self.backspaceButton) { return; }
+    UILabel *label = self.backspaceClearLabel;
+    [self kb_refreshBackspaceClearLabelColors];
+    if (!label.superview) {
+        [hostView addSubview:label];
+    }
+    [self kb_updateBackspaceClearLabelFrame];
+    [hostView bringSubviewToFront:label];
+    if (label.hidden) {
+        label.alpha = 0.0;
+        label.hidden = NO;
+        [self kb_playLightHaptic];
+        [UIView animateWithDuration:0.12 animations:^{
+            label.alpha = 1.0;
+        }];
+    }
+}
+
+- (void)kb_hideBackspaceClearLabel {
+    if (!_backspaceClearLabel || _backspaceClearLabel.hidden) { return; }
+    _backspaceClearLabel.hidden = YES;
+    _backspaceClearLabel.alpha = 1.0;
+    [self kb_setBackspaceClearHighlighted:NO];
+}
+
+- (void)kb_updateBackspaceClearLabelFrame {
+    UIView *hostView = [self kb_hostView];
+    if (!hostView || !self.backspaceButton || !self.backspaceClearLabel) { return; }
+    CGRect btnFrame = [self.backspaceButton convertRect:self.backspaceButton.bounds toView:hostView];
+    UILabel *label = self.backspaceClearLabel;
+    CGSize textSize = [label sizeThatFits:CGSizeMake(CGFLOAT_MAX, kKBBackspaceClearLabelHeight)];
+    CGFloat width = MAX(textSize.width + kKBBackspaceClearLabelPaddingX * 2.0, 60.0);
+    CGFloat height = kKBBackspaceClearLabelHeight;
+    CGFloat x = CGRectGetMidX(btnFrame) - width * 0.5;
+    CGFloat y = CGRectGetMinY(btnFrame) - height - kKBBackspaceClearLabelTopGap;
+    if (x < kKBBackspaceClearLabelHorizontalInset) { x = kKBBackspaceClearLabelHorizontalInset; }
+    CGFloat maxX = CGRectGetWidth(hostView.bounds) - kKBBackspaceClearLabelHorizontalInset - width;
+    if (x > maxX) { x = maxX; }
+    if (y < 0) { y = 0; }
+    label.frame = CGRectIntegral(CGRectMake(x, y, width, height));
+}
+
+- (BOOL)kb_isPointInsideBackspaceClearLabel:(CGPoint)point {
+    if (!self.backspaceClearLabel || self.backspaceClearLabel.hidden) { return NO; }
+    [self kb_updateBackspaceClearLabelFrame];
+    CGRect hitFrame = CGRectInset(self.backspaceClearLabel.frame, -12.0, -10.0);
+    return CGRectContainsPoint(hitFrame, point);
+}
+
+- (void)kb_setBackspaceClearHighlighted:(BOOL)highlighted {
+    if (self.backspaceClearHighlighted == highlighted) { return; }
+    self.backspaceClearHighlighted = highlighted;
+    [self kb_refreshBackspaceClearLabelColors];
+}
+
+- (void)kb_refreshBackspaceClearLabelColors {
+    UILabel *label = self.backspaceClearLabel;
+    label.textColor = [KBSkinManager shared].current.keyTextColor ?: UIColor.blackColor;
+    label.backgroundColor = self.backspaceClearHighlighted
+                            ? [self kb_backspaceClearLabelHighlightedColor]
+                            : [self kb_backspaceClearLabelNormalColor];
+}
+
+- (UIColor *)kb_backspaceClearLabelNormalColor {
+    KBSkinTheme *t = [KBSkinManager shared].current;
+    return t.keyHighlightBackground ?: [UIColor colorWithWhite:0.9 alpha:1.0];
+}
+
+- (UIColor *)kb_backspaceClearLabelHighlightedColor {
+    KBSkinTheme *t = [KBSkinManager shared].current;
+    return t.accentColor ?: t.keyHighlightBackground ?: [UIColor colorWithWhite:0.8 alpha:1.0];
+}
+
+- (void)kb_playLightHaptic {
+    if (@available(iOS 10.0, *)) {
+        UIImpactFeedbackGenerator *gen = [[UIImpactFeedbackGenerator alloc] initWithStyle:UIImpactFeedbackStyleLight];
+        [gen prepare];
+        [gen impactOccurred];
+    }
+}
+
+- (UILabel *)backspaceClearLabel {
+    if (!_backspaceClearLabel) {
+        UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
+        label.text = @"立刻清空";
+        label.textAlignment = NSTextAlignmentCenter;
+        label.font = [UIFont systemFontOfSize:12 weight:UIFontWeightSemibold];
+        label.textColor = [KBSkinManager shared].current.keyTextColor ?: UIColor.blackColor;
+        label.backgroundColor = [self kb_backspaceClearLabelNormalColor];
+        label.layer.cornerRadius = kKBBackspaceClearLabelCornerRadius;
+        label.layer.masksToBounds = YES;
+        label.hidden = YES;
+        label.userInteractionEnabled = NO;
+        _backspaceClearLabel = label;
+    }
+    return _backspaceClearLabel;
+}
+
+#pragma mark - Clear
+
+- (void)kb_clearAllInput {
+    self.backspaceClearToken += 1;
+    NSUInteger token = self.backspaceClearToken;
+    [self kb_clearAllInputStepForToken:token guard:0 emptyRounds:0];
+}
+
+- (void)kb_clearAllInputStepForToken:(NSUInteger)token
+                               guard:(NSInteger)guard
+                         emptyRounds:(NSInteger)emptyRounds {
+    if (token != self.backspaceClearToken) { return; }
+    UIResponder *start = (UIResponder *)([self kb_hostView] ?: self.backspaceButton);
+    UIInputViewController *ivc = KBFindInputViewController(start);
+    if (!ivc) { return; }
+    id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
+    NSString *before = proxy.documentContextBeforeInput ?: @"";
+    NSInteger count = before.length;
+    NSInteger batch = 0;
+    NSInteger nextEmptyRounds = emptyRounds;
+    BOOL hitBoundary = NO;
+    if (count > 0) {
+        batch = [self kb_clearDeleteCountForContext:before hitBoundary:&hitBoundary];
+        nextEmptyRounds = 0;
+    } else {
+        batch = kKBBackspaceClearBatchSize;
+        nextEmptyRounds = emptyRounds + 1;
+    }
+    if (batch <= 0) { batch = 1; }
+
+    if (guard >= kKBBackspaceClearMaxDeletes ||
+        nextEmptyRounds > kKBBackspaceClearEmptyContextMaxRounds) {
+        return;
+    }
+
+    for (NSInteger i = 0; i < batch; i++) {
+        [proxy deleteBackward];
+    }
+
+    NSInteger nextGuard = guard + batch;
+    BOOL shouldContinue = NO;
+    if (count > 0 && !hitBoundary) {
+        if (count > batch) {
+            shouldContinue = YES;
+        } else if ([proxy hasText]) {
+            shouldContinue = YES;
+        }
+    }
+
+    if (!shouldContinue) { return; }
+    __weak typeof(self) weakSelf = self;
+    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
+                                 (int64_t)(kKBBackspaceClearBatchInterval * NSEC_PER_SEC)),
+                   dispatch_get_main_queue(), ^{
+        __strong typeof(weakSelf) selfStrong = weakSelf;
+        [selfStrong kb_clearAllInputStepForToken:token
+                                           guard:nextGuard
+                                     emptyRounds:nextEmptyRounds];
+    });
+}
+
+#pragma mark - Helpers
+
+- (UIView *)kb_hostView {
+    if (self.containerView) { return self.containerView; }
+    return self.backspaceButton.superview;
+}
+
+@end

CustomKeyboard/View/KBFunctionView.m

@@ -25,6 +25,7 @@
 #import "KBTagItemModel.h"
 #import <MJExtension/MJExtension.h>
 #import "KBBizCode.h"
+#import "KBBackspaceLongPressHandler.h"
 
 @interface KBFunctionView () <KBFunctionBarViewDelegate, KBStreamOverlayViewDelegate, KBFunctionTagListViewDelegate>
 // UI
@@ -59,6 +60,7 @@
 // UL 双路兜底
 @property (nonatomic, assign) NSUInteger kb_ulSeq;      // 当前 UL 发起序号
 @property (nonatomic, assign) BOOL kb_ulHandledFlag;    // 主 App 已确认处理 UL
+@property (nonatomic, strong) KBBackspaceLongPressHandler *backspaceHandler;
 @end
 
 @implementation KBFunctionView
@@ -67,6 +69,7 @@
     if (self = [super initWithFrame:frame]) {
         // 背景使用当前主题强调色
         [self kb_applyTheme];
+        self.backspaceHandler = [[KBBackspaceLongPressHandler alloc] initWithContainerView:self];
 
         [self setupUI];
 //        [self reloadDemoData];
@@ -770,22 +773,9 @@ static void KBULDarwinCallback(CFNotificationCenterRef center, void *observer, C
     id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
     [proxy deleteBackward];
 }
-    - (void)onTapClear {
+- (void)onTapClear {
     NSLog(@"点击：清空");
-    // 连续删除：仅清空光标之前的输入（不改动 pasteView 的内容）
+    [self.backspaceHandler performClearAction];
-    UIInputViewController *ivc = KBFindInputViewController(self);
-    id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
-    // 逐批读取 documentContextBeforeInput 并删除，避免 50 字符窗口限制带来的残留
-    NSInteger guard = 0; // 上限保护，避免极端情况下长时间阻塞
-    while (guard < 10000) {
-        NSString *before = proxy.documentContextBeforeInput ?: @"";
-        NSInteger count = before.length;
-        if (count <= 0) { break; } // 光标前已无内容
-        for (NSInteger i = 0; i < count; i++) {
-            [proxy deleteBackward];
-        }
-        guard += count;
-    }
 }
     - (void)onTapSend {
     NSLog(@"点击：发送");
@@ -872,6 +862,7 @@ static void KBULDarwinCallback(CFNotificationCenterRef center, void *observer, C
         [_deleteButtonInternal setImage:[UIImage imageNamed:@"kb_del_icon"] forState:UIControlStateNormal];
 
         [_deleteButtonInternal addTarget:self action:@selector(onTapDelete) forControlEvents:UIControlEventTouchUpInside];
+        [self.backspaceHandler bindDeleteButton:_deleteButtonInternal];
     }
     return _deleteButtonInternal;
 }

CustomKeyboard/View/KBKeyboardView.m

@@ -6,32 +6,15 @@
 #import "KBKeyboardView.h"
 #import "KBKeyButton.h"
 #import "KBKey.h"
-#import "KBResponderUtils.h" // 封装的响应链工具
 #import "KBSkinManager.h"
 #import "KBKeyPreviewView.h"
+#import "KBBackspaceLongPressHandler.h"
 
 // UI 常量统一管理，方便后续调试样式（以 375 宽设计稿为基准，通过 KBFit 做等比缩放）
 #define kKBRowVerticalSpacing  KBFit(8.0f)
 #define kKBRowHorizontalInset  KBFit(6.0f)
 #define kKBRowHeight           KBFit(40.0f)
 
-static const NSTimeInterval kKBBackspaceLongPressMinDuration = 0.35;
-static const NSTimeInterval kKBBackspaceRepeatInterval = 0.06;
-static const NSTimeInterval kKBBackspaceChunkStartDelay = 0.1;
-static const NSTimeInterval kKBBackspaceChunkRepeatInterval = 0.1;
-static const NSTimeInterval kKBBackspaceChunkFastDelay = 1.4;
-static const NSInteger kKBBackspaceChunkSize = 6;
-static const NSInteger kKBBackspaceChunkSizeFast = 12;
-static const CGFloat kKBBackspaceClearLabelCornerRadius = 8.0;
-static const CGFloat kKBBackspaceClearLabelHeight = 26.0;
-static const CGFloat kKBBackspaceClearLabelPaddingX = 10.0;
-static const CGFloat kKBBackspaceClearLabelTopGap = 6.0;
-static const NSInteger kKBBackspaceClearBatchSize = 24;
-static const NSTimeInterval kKBBackspaceClearBatchInterval = 0.005;
-static const NSInteger kKBBackspaceClearMaxDeletes = 10000;
-static const NSInteger kKBBackspaceClearEmptyContextMaxRounds = 40;
-static const NSInteger kKBBackspaceClearMaxStep = 80;
-
 static const NSTimeInterval kKBPreviewShowDuration = 0.08;
 static const NSTimeInterval kKBPreviewHideDuration = 0.06;
 
@@ -42,31 +25,13 @@ static const CGFloat kKBSpaceWidthMultiplier = 3.0;
 // 第二行字母行的左右占位比例（用于居中）
 static const CGFloat kKBLettersRow2EdgeSpacerMultiplier = 0.5;
 
-typedef NS_ENUM(NSInteger, KBBackspaceChunkClass) {
-    KBBackspaceChunkClassUnknown = 0,
-    KBBackspaceChunkClassWhitespace,
-    KBBackspaceChunkClassASCIIWord,
-    KBBackspaceChunkClassPunctuation,
-    KBBackspaceChunkClassOther
-};
-
 @interface KBKeyboardView ()
 @property (nonatomic, strong) UIView *row1;
 @property (nonatomic, strong) UIView *row2;
 @property (nonatomic, strong) UIView *row3;
 @property (nonatomic, strong) UIView *row4;
 @property (nonatomic, strong) NSArray<NSArray<KBKey *> *> *keysForRows;
-// 长按退格的一次次删除控制标记（不使用 NSTimer，仅用 GCD 递归调度）
+@property (nonatomic, strong) KBBackspaceLongPressHandler *backspaceHandler;
-@property (nonatomic, assign) BOOL backspaceHoldActive;
-@property (nonatomic, assign) NSTimeInterval backspaceHoldStartTime;
-@property (nonatomic, assign) BOOL backspaceChunkModeActive;
-@property (nonatomic, assign) BOOL backspaceClearHighlighted;
-@property (nonatomic, assign) NSUInteger backspaceHoldToken;
-@property (nonatomic, assign) BOOL backspaceHasLastTouchPoint;
-@property (nonatomic, assign) CGPoint backspaceLastTouchPointInSelf;
-@property (nonatomic, assign) NSUInteger backspaceClearToken;
-@property (nonatomic, weak) KBKeyButton *backspaceButton;
-@property (nonatomic, strong) UILabel *backspaceClearLabel;
 @property (nonatomic, strong) KBKeyPreviewView *previewView;
 @end
 
@@ -79,6 +44,7 @@ typedef NS_ENUM(NSInteger, KBBackspaceChunkClass) {
         // 默认小写：与需求一致，初始不开启 Shift
         _shiftOn = NO;
         _symbolsMoreOn = NO; // 数字面板默认第一页（123）
+        self.backspaceHandler = [[KBBackspaceLongPressHandler alloc] initWithContainerView:self];
         [self buildBase];
         [self reloadKeys];
     }
@@ -127,10 +93,7 @@ typedef NS_ENUM(NSInteger, KBBackspaceChunkClass) {
 #pragma mark - Public
 
 - (void)reloadKeys {
-    self.backspaceButton = nil;
+    [self.backspaceHandler bindDeleteButton:nil];
-    self.backspaceChunkModeActive = NO;
-    self.backspaceClearHighlighted = NO;
-    [self kb_hideBackspaceClearLabel];
     // 移除旧按钮
     for (UIView *row in @[self.row1, self.row2, self.row3, self.row4]) {
         [row.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
@@ -406,16 +369,8 @@ edgeSpacerMultiplier:(CGFloat)edgeSpacerMultiplier {
         [btn addTarget:self action:@selector(onKeyTapped:) forControlEvents:UIControlEventTouchUpInside];
         [row addSubview:btn];
 
-        // ⌫ 长按：开始连续逐个删除（无需 NSTimer）。使用 UILongPressGestureRecognizer 识别长按
         if (key.type == KBKeyTypeBackspace) {
-            UILongPressGestureRecognizer *lp =
+            [self.backspaceHandler bindDeleteButton:btn];
-            [[UILongPressGestureRecognizer alloc] initWithTarget:self
-                                                          action:@selector(onBackspaceLongPress:)];
-            lp.minimumPressDuration = kKBBackspaceLongPressMinDuration;
-            lp.allowableMovement = CGFLOAT_MAX;
-            lp.cancelsTouchesInView = YES; // 被识别为长按时，取消普通点击
-            [btn addGestureRecognizer:lp];
-            self.backspaceButton = btn;
         }
 
         // Shift 按钮选中态随大小写状态变化
@@ -703,383 +658,6 @@ edgeSpacerMultiplier:(CGFloat)edgeSpacerMultiplier {
                      }];
 }
 
-// 长按退格：先连续单删，稍后切换为按段删除；松手停止。（不使用 NSTimer/DisplayLink）
-- (void)onBackspaceLongPress:(UILongPressGestureRecognizer *)gr {
-    if (gr) {
-        self.backspaceLastTouchPointInSelf = [gr locationInView:self];
-        self.backspaceHasLastTouchPoint = YES;
-    }
-    switch (gr.state) {
-        case UIGestureRecognizerStateBegan: {
-            // 递增 token：使上一次长按（可能尚未触发的 dispatch_after）立即失效，
-            // 避免“第一次长按后第二次长按失效/异常加速”等并发问题。
-            self.backspaceHoldToken += 1;
-            NSUInteger token = self.backspaceHoldToken;
-            self.backspaceHoldActive = YES;
-            self.backspaceHoldStartTime = [NSDate date].timeIntervalSinceReferenceDate;
-            self.backspaceChunkModeActive = NO;
-            [self kb_setBackspaceClearHighlighted:NO];
-            [self kb_hideBackspaceClearLabel];
-            [self kb_backspaceStepForToken:token];
-        } break;
-        case UIGestureRecognizerStateChanged: {
-            [self kb_handleBackspaceLongPressChanged:gr];
-        } break;
-        case UIGestureRecognizerStateEnded:
-        case UIGestureRecognizerStateCancelled:
-        case UIGestureRecognizerStateFailed: {
-            [self kb_handleBackspaceLongPressEnded:gr];
-        } break;
-        default: break;
-    }
-}
-
-#pragma mark - Helpers
-
-// 单步删除并在需要时安排下一次，直到松手或无内容
-- (void)kb_backspaceStepForToken:(NSUInteger)token {
-    if (!self.backspaceHoldActive) { return; }
-    if (token != self.backspaceHoldToken) { return; }
-    UIInputViewController *ivc = KBFindInputViewController(self);
-    if (!ivc) { self.backspaceHoldActive = NO; return; }
-    id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
-    NSString *before = proxy.documentContextBeforeInput ?: @"";
-    NSTimeInterval elapsed = [NSDate date].timeIntervalSinceReferenceDate - self.backspaceHoldStartTime;
-    NSInteger deleteCount = 1;
-    if (before.length > 0) {
-        deleteCount = [self kb_backspaceDeleteCountForContext:before elapsed:elapsed];
-    }
-    if (!self.backspaceChunkModeActive && elapsed >= kKBBackspaceChunkStartDelay) {
-        self.backspaceChunkModeActive = YES;
-        [self kb_showBackspaceClearLabelIfNeeded];
-    }
-    for (NSInteger i = 0; i < deleteCount; i++) {
-        [proxy deleteBackward];
-    }
-
-    NSTimeInterval interval = [self kb_backspaceRepeatIntervalForElapsed:elapsed];
-    __weak typeof(self) weakSelf = self;
-    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
-                                 (int64_t)(interval * NSEC_PER_SEC)),
-                   dispatch_get_main_queue(), ^{
-        __strong typeof(weakSelf) selfStrong = weakSelf;
-        [selfStrong kb_backspaceStepForToken:token];
-    });
-}
-
-- (NSTimeInterval)kb_backspaceRepeatIntervalForElapsed:(NSTimeInterval)elapsed {
-    if (elapsed >= kKBBackspaceChunkStartDelay) {
-        return kKBBackspaceChunkRepeatInterval;
-    }
-    return kKBBackspaceRepeatInterval;
-}
-
-- (NSInteger)kb_backspaceDeleteCountForContext:(NSString *)context elapsed:(NSTimeInterval)elapsed {
-    if (elapsed < kKBBackspaceChunkStartDelay) {
-        return 1;
-    }
-    NSInteger maxCount = (elapsed >= kKBBackspaceChunkFastDelay)
-                         ? kKBBackspaceChunkSizeFast : kKBBackspaceChunkSize;
-    return [self kb_backspaceChunkDeleteCountForContext:context maxCount:maxCount];
-}
-
-- (NSInteger)kb_backspaceChunkDeleteCountForContext:(NSString *)context maxCount:(NSInteger)maxCount {
-    if (context.length == 0) { return 1; }
-
-    static NSCharacterSet *whitespaceSet = nil;
-    static NSCharacterSet *asciiWordSet = nil;
-    static NSCharacterSet *punctuationSet = nil;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{
-        whitespaceSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
-        asciiWordSet = [NSCharacterSet characterSetWithCharactersInString:
-                        @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_"];
-        punctuationSet = [NSCharacterSet punctuationCharacterSet];
-    });
-
-    __block NSInteger deleteCount = 0;
-    __block KBBackspaceChunkClass chunkClass = KBBackspaceChunkClassUnknown;
-    [context enumerateSubstringsInRange:NSMakeRange(0, context.length)
-                                options:NSStringEnumerationByComposedCharacterSequences | NSStringEnumerationReverse
-                             usingBlock:^(NSString *substring, __unused NSRange substringRange, __unused NSRange enclosingRange, BOOL *stop) {
-        if (substring.length == 0) { return; }
-        KBBackspaceChunkClass currentClass = KBBackspaceChunkClassOther;
-        if ([substring rangeOfCharacterFromSet:whitespaceSet].location != NSNotFound) {
-            currentClass = KBBackspaceChunkClassWhitespace;
-        } else if ([substring rangeOfCharacterFromSet:asciiWordSet].location != NSNotFound) {
-            currentClass = KBBackspaceChunkClassASCIIWord;
-        } else if ([substring rangeOfCharacterFromSet:punctuationSet].location != NSNotFound) {
-            currentClass = KBBackspaceChunkClassPunctuation;
-        }
-
-        if (chunkClass == KBBackspaceChunkClassUnknown) {
-            chunkClass = currentClass;
-        } else if (chunkClass != currentClass) {
-            *stop = YES;
-            return;
-        }
-
-        deleteCount += 1;
-        if (deleteCount >= maxCount) {
-            *stop = YES;
-        }
-    }];
-
-    return MAX(deleteCount, 1);
-}
-
-- (NSInteger)kb_clearDeleteCountForContext:(NSString *)context
-                               hitBoundary:(BOOL *)hitBoundary {
-    if (context.length == 0) { return kKBBackspaceClearBatchSize; }
-
-    static NSCharacterSet *sentenceBoundarySet = nil;
-    static NSCharacterSet *whitespaceSet = nil;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{
-        sentenceBoundarySet = [NSCharacterSet characterSetWithCharactersInString:@".!?;。！？；…\n"];
-        whitespaceSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
-    });
-
-    NSInteger length = context.length;
-    NSInteger end = length;
-    while (end > 0) {
-        unichar ch = [context characterAtIndex:end - 1];
-        if ([whitespaceSet characterIsMember:ch]) {
-            end -= 1;
-        } else {
-            break;
-        }
-    }
-    NSInteger searchEnd = end;
-    while (searchEnd > 0) {
-        unichar ch = [context characterAtIndex:searchEnd - 1];
-        if ([sentenceBoundarySet characterIsMember:ch]) {
-            searchEnd -= 1;
-        } else {
-            break;
-        }
-    }
-
-    NSInteger boundaryIndex = NSNotFound;
-    for (NSInteger i = searchEnd - 1; i >= 0; i--) {
-        unichar ch = [context characterAtIndex:i];
-        if ([sentenceBoundarySet characterIsMember:ch]) {
-            boundaryIndex = i;
-            break;
-        }
-    }
-
-    BOOL boundaryFound = (boundaryIndex != NSNotFound);
-    NSInteger deleteCount = length;
-    if (boundaryIndex != NSNotFound) {
-        deleteCount = length - (boundaryIndex + 1);
-    }
-    deleteCount = MAX(deleteCount, 1);
-    if (hitBoundary) {
-        *hitBoundary = boundaryFound;
-    }
-    return MIN(deleteCount, kKBBackspaceClearMaxStep);
-}
-
-- (void)kb_handleBackspaceLongPressChanged:(UILongPressGestureRecognizer *)gr {
-    if (!self.backspaceHoldActive) { return; }
-    NSTimeInterval elapsed = [NSDate date].timeIntervalSinceReferenceDate - self.backspaceHoldStartTime;
-    if (elapsed < kKBBackspaceChunkStartDelay) { return; }
-    [self kb_showBackspaceClearLabelIfNeeded];
-    CGPoint point = [gr locationInView:self];
-    self.backspaceLastTouchPointInSelf = point;
-    self.backspaceHasLastTouchPoint = YES;
-    BOOL inside = [self kb_isPointInsideBackspaceClearLabel:point];
-    [self kb_setBackspaceClearHighlighted:inside];
-}
-
-- (void)kb_handleBackspaceLongPressEnded:(UILongPressGestureRecognizer *)gr {
-    BOOL shouldClear = self.backspaceClearHighlighted;
-    if (!shouldClear) {
-        CGPoint point = CGPointZero;
-        if (gr) {
-            point = [gr locationInView:self];
-        } else if (self.backspaceHasLastTouchPoint) {
-            point = self.backspaceLastTouchPointInSelf;
-        }
-        shouldClear = [self kb_isPointInsideBackspaceClearLabel:point];
-    }
-    self.backspaceHoldActive = NO;
-    self.backspaceChunkModeActive = NO;
-    self.backspaceHoldToken += 1; // 结束/取消时也使剩余回调失效
-    self.backspaceHasLastTouchPoint = NO;
-    [self kb_hideBackspaceClearLabel];
-    if (shouldClear) {
-        [self kb_clearAllInput];
-    }
-}
-
-- (void)kb_showBackspaceClearLabelIfNeeded {
-    if (!self.backspaceButton) { return; }
-    UILabel *label = self.backspaceClearLabel;
-    [self kb_refreshBackspaceClearLabelColors];
-    if (!label.superview) {
-        [self addSubview:label];
-    }
-    [self kb_updateBackspaceClearLabelFrame];
-    [self bringSubviewToFront:label];
-    if (label.hidden) {
-        label.alpha = 0.0;
-        label.hidden = NO;
-        [self kb_playLightHaptic];
-        [UIView animateWithDuration:0.12 animations:^{
-            label.alpha = 1.0;
-        }];
-    }
-}
-
-- (void)kb_hideBackspaceClearLabel {
-    if (!_backspaceClearLabel || _backspaceClearLabel.hidden) { return; }
-    _backspaceClearLabel.hidden = YES;
-    _backspaceClearLabel.alpha = 1.0;
-    [self kb_setBackspaceClearHighlighted:NO];
-}
-
-- (void)kb_updateBackspaceClearLabelFrame {
-    if (!self.backspaceButton || !self.backspaceClearLabel) { return; }
-    CGRect btnFrame = [self.backspaceButton convertRect:self.backspaceButton.bounds toView:self];
-    UILabel *label = self.backspaceClearLabel;
-    CGSize textSize = [label sizeThatFits:CGSizeMake(CGFLOAT_MAX, kKBBackspaceClearLabelHeight)];
-    CGFloat width = MAX(textSize.width + kKBBackspaceClearLabelPaddingX * 2.0, 60.0);
-    CGFloat height = kKBBackspaceClearLabelHeight;
-    CGFloat x = CGRectGetMidX(btnFrame) - width * 0.5;
-    CGFloat y = CGRectGetMinY(btnFrame) - height - kKBBackspaceClearLabelTopGap;
-    if (x < kKBRowHorizontalInset) { x = kKBRowHorizontalInset; }
-    if (x + width > CGRectGetWidth(self.bounds) - kKBRowHorizontalInset) {
-        x = CGRectGetWidth(self.bounds) - kKBRowHorizontalInset - width;
-    }
-    if (y < 0) { y = 0; }
-    label.frame = CGRectIntegral(CGRectMake(x, y, width, height));
-}
-
-- (BOOL)kb_isPointInsideBackspaceClearLabel:(CGPoint)point {
-    if (!self.backspaceClearLabel || self.backspaceClearLabel.hidden) { return NO; }
-    [self kb_updateBackspaceClearLabelFrame];
-    CGRect hitFrame = CGRectInset(self.backspaceClearLabel.frame, -12.0, -10.0);
-    return CGRectContainsPoint(hitFrame, point);
-}
-
-- (void)kb_setBackspaceClearHighlighted:(BOOL)highlighted {
-    if (self.backspaceClearHighlighted == highlighted) { return; }
-    self.backspaceClearHighlighted = highlighted;
-    [self kb_refreshBackspaceClearLabelColors];
-}
-
-- (void)kb_refreshBackspaceClearLabelColors {
-    UILabel *label = self.backspaceClearLabel;
-    label.textColor = [KBSkinManager shared].current.keyTextColor ?: UIColor.blackColor;
-    label.backgroundColor = self.backspaceClearHighlighted
-                            ? [self kb_backspaceClearLabelHighlightedColor]
-                            : [self kb_backspaceClearLabelNormalColor];
-}
-
-- (UIColor *)kb_backspaceClearLabelNormalColor {
-    KBSkinTheme *t = [KBSkinManager shared].current;
-    return t.keyHighlightBackground ?: [UIColor colorWithWhite:0.9 alpha:1.0];
-}
-
-- (UIColor *)kb_backspaceClearLabelHighlightedColor {
-    KBSkinTheme *t = [KBSkinManager shared].current;
-    return t.accentColor ?: t.keyHighlightBackground ?: [UIColor colorWithWhite:0.8 alpha:1.0];
-}
-
-- (void)kb_playLightHaptic {
-    if (@available(iOS 10.0, *)) {
-        UIImpactFeedbackGenerator *gen = [[UIImpactFeedbackGenerator alloc] initWithStyle:UIImpactFeedbackStyleLight];
-        [gen prepare];
-        [gen impactOccurred];
-    }
-}
-
-- (UILabel *)backspaceClearLabel {
-    if (!_backspaceClearLabel) {
-        UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
-        label.text = @"立刻清空";
-        label.textAlignment = NSTextAlignmentCenter;
-        label.font = [UIFont systemFontOfSize:12 weight:UIFontWeightSemibold];
-        label.textColor = [KBSkinManager shared].current.keyTextColor ?: UIColor.blackColor;
-        label.backgroundColor = [self kb_backspaceClearLabelNormalColor];
-        label.layer.cornerRadius = kKBBackspaceClearLabelCornerRadius;
-        label.layer.masksToBounds = YES;
-        label.hidden = YES;
-        label.userInteractionEnabled = NO;
-        _backspaceClearLabel = label;
-    }
-    return _backspaceClearLabel;
-}
-
-- (void)kb_clearAllInput {
-    self.backspaceClearToken += 1;
-    NSUInteger token = self.backspaceClearToken;
-    [self kb_clearAllInputStepForToken:token guard:0 emptyRounds:0];
-}
-
-- (void)kb_clearAllInputStepForToken:(NSUInteger)token
-                               guard:(NSInteger)guard
-                         emptyRounds:(NSInteger)emptyRounds {
-    if (token != self.backspaceClearToken) { return; }
-    UIInputViewController *ivc = KBFindInputViewController(self);
-    if (!ivc) { return; }
-    id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
-    NSString *before = proxy.documentContextBeforeInput ?: @"";
-    NSInteger count = before.length;
-    NSInteger batch = 0;
-    NSInteger nextEmptyRounds = emptyRounds;
-    BOOL hitBoundary = NO;
-    if (count > 0) {
-        batch = [self kb_clearDeleteCountForContext:before hitBoundary:&hitBoundary];
-        nextEmptyRounds = 0;
-    } else {
-        batch = kKBBackspaceClearBatchSize;
-        nextEmptyRounds = emptyRounds + 1;
-    }
-    if (batch <= 0) { batch = 1; }
-
-    if (guard >= kKBBackspaceClearMaxDeletes ||
-        nextEmptyRounds > kKBBackspaceClearEmptyContextMaxRounds) {
-        return;
-    }
-
-    for (NSInteger i = 0; i < batch; i++) {
-        [proxy deleteBackward];
-    }
-
-    NSInteger nextGuard = guard + batch;
-    BOOL shouldContinue = NO;
-    if (count > 0 && !hitBoundary) {
-        if (count > batch) {
-            shouldContinue = YES;
-        } else if ([proxy hasText]) {
-            shouldContinue = YES;
-        }
-    }
-
-    if (!shouldContinue) { return; }
-    __weak typeof(self) weakSelf = self;
-    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
-                                 (int64_t)(kKBBackspaceClearBatchInterval * NSEC_PER_SEC)),
-                   dispatch_get_main_queue(), ^{
-        __strong typeof(weakSelf) selfStrong = weakSelf;
-        [selfStrong kb_clearAllInputStepForToken:token
-                                           guard:nextGuard
-                                     emptyRounds:nextEmptyRounds];
-    });
-}
-
-#pragma mark - Layout
-
-- (void)layoutSubviews {
-    [super layoutSubviews];
-    if (self.backspaceClearLabel && !self.backspaceClearLabel.hidden) {
-        [self kb_updateBackspaceClearLabelFrame];
-    }
-}
-
 #pragma mark - Lazy
 
 - (UIView *)row1 { if (!_row1) _row1 = [UIView new]; return _row1; }

keyBoard.xcodeproj/project.pbxproj

@@ -178,6 +178,7 @@
 		04FC956A2EB05497007BD342 /* KBKeyButton.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC95692EB05497007BD342 /* KBKeyButton.m */; };
 		04FC956D2EB054B7007BD342 /* KBKeyboardView.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC956C2EB054B7007BD342 /* KBKeyboardView.m */; };
 		04FC95702EB09516007BD342 /* KBFunctionView.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC956F2EB09516007BD342 /* KBFunctionView.m */; };
+		A1B2C9032FBD000100000001 /* KBBackspaceLongPressHandler.m in Sources */ = {isa = PBXBuildFile; fileRef = A1B2C9022FBD000100000001 /* KBBackspaceLongPressHandler.m */; };
 		04FC95732EB09570007BD342 /* KBFunctionBarView.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC95722EB09570007BD342 /* KBFunctionBarView.m */; };
 		04FC95762EB095DE007BD342 /* KBFunctionPasteView.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC95752EB095DE007BD342 /* KBFunctionPasteView.m */; };
 		04FC95792EB09BC8007BD342 /* KBKeyBoardMainView.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC95782EB09BC8007BD342 /* KBKeyBoardMainView.m */; };
@@ -538,6 +539,8 @@
 		04FC956C2EB054B7007BD342 /* KBKeyboardView.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBKeyboardView.m; sourceTree = "<group>"; };
 		04FC956E2EB09516007BD342 /* KBFunctionView.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBFunctionView.h; sourceTree = "<group>"; };
 		04FC956F2EB09516007BD342 /* KBFunctionView.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBFunctionView.m; sourceTree = "<group>"; };
+		A1B2C9012FBD000100000001 /* KBBackspaceLongPressHandler.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBBackspaceLongPressHandler.h; sourceTree = "<group>"; };
+		A1B2C9022FBD000100000001 /* KBBackspaceLongPressHandler.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBBackspaceLongPressHandler.m; sourceTree = "<group>"; };
 		04FC95712EB09570007BD342 /* KBFunctionBarView.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBFunctionBarView.h; sourceTree = "<group>"; };
 		04FC95722EB09570007BD342 /* KBFunctionBarView.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBFunctionBarView.m; sourceTree = "<group>"; };
 		04FC95742EB095DE007BD342 /* KBFunctionPasteView.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBFunctionPasteView.h; sourceTree = "<group>"; };
@@ -805,6 +808,8 @@
 		0477BD942EBAFF4E0055D639 /* Utils */ = {
 			isa = PBXGroup;
 			children = (
+				A1B2C9012FBD000100000001 /* KBBackspaceLongPressHandler.h */,
+				A1B2C9022FBD000100000001 /* KBBackspaceLongPressHandler.m */,
 			);
 			path = Utils;
 			sourceTree = "<group>";
@@ -1892,6 +1897,7 @@
 				049FB23C2EC4766700FAB05D /* KBStreamOverlayView.m in Sources */,
 				049FB22F2EC34EB900FAB05D /* KBStreamTextView.m in Sources */,
 				04FC95702EB09516007BD342 /* KBFunctionView.m in Sources */,
+				A1B2C9032FBD000100000001 /* KBBackspaceLongPressHandler.m in Sources */,
 				049FB23F2EC4B6EF00FAB05D /* KBULBridgeNotification.m in Sources */,
 				04791F992ED49CE7004E8522 /* KBFont.m in Sources */,
 				04FC956D2EB054B7007BD342 /* KBKeyboardView.m in Sources */,