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CustomKeyboard/KeyboardViewControllerHelp/KeyboardViewController+UI.m

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+//
+//  KeyboardViewController+UI.m
+//  CustomKeyboard
+//
+//  Created by Codex on 2026/02/22.
+//
+
+#import "KeyboardViewController+Private.h"
+
+#import "KBChatMessage.h"
+#import "KBChatPanelView.h"
+#import "KBFunctionView.h"
+#import "KBKeyBoardMainView.h"
+#import "KBKeyboardSubscriptionView.h"
+#import "KBSettingView.h"
+#import "Masonry.h"
+
+@implementation KeyboardViewController (UI)
+
+- (void)setupUI {
+  self.view.translatesAutoresizingMaskIntoConstraints = NO;
+
+  // 按“短边”宽度等比缩放，横屏保持竖屏布局比例
+  CGFloat portraitWidth = [self kb_portraitWidth];
+  CGFloat keyboardHeight = [self kb_keyboardHeightForWidth:portraitWidth];
+  CGFloat keyboardBaseHeight = [self kb_keyboardBaseHeightForWidth:portraitWidth];
+  CGFloat screenWidth = CGRectGetWidth([UIScreen mainScreen].bounds);
+
+  // FIX: iOS 26 键盘闪烁问题
+  // iOS 26 在键盘滑入动画开始前，会对 self.view 做一次离屏预渲染快照（非实时 view），
+  // 该快照会短暂显示在屏幕中间。如果此时 view 已有完整高度和内容，用户就会看到
+  // 键盘 UI 在屏幕中间闪现一帧，然后键盘才从底部正常滑入。
+  // 解决方案：初始高度设为 0，让系统快照时无内容可渲染；
+  // 在 viewWillAppear: 中恢复正确高度，此时系统已准备好滑入动画。
+  // （iOS 18 及更早版本无此预渲染机制，不受影响）
+  NSLayoutConstraint *h = [self.view.heightAnchor constraintEqualToConstant:0];
+  NSLayoutConstraint *w =
+      [self.view.widthAnchor constraintEqualToConstant:screenWidth];
+  self.kb_heightConstraint = h;
+  self.kb_widthConstraint = w;
+
+  h.priority = UILayoutPriorityRequired;
+  w.priority = UILayoutPriorityRequired;
+  [NSLayoutConstraint activateConstraints:@[ h, w ]];
+  // 关闭 UIInputView 自适应（某些系统版本会尝试放大为全屏高度导致冲突）
+  if ([self.view isKindOfClass:[UIInputView class]]) {
+    UIInputView *iv = (UIInputView *)self.view;
+    if ([iv respondsToSelector:@selector(setAllowsSelfSizing:)]) {
+      iv.allowsSelfSizing = NO;
+    }
+  }
+  // 内容容器：横屏时保持竖屏宽度，居中显示
+  [self.view addSubview:self.contentView];
+  [self.contentView mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.centerX.equalTo(self.view);
+    make.bottom.equalTo(self.view);
+    self.contentWidthConstraint = make.width.mas_equalTo(portraitWidth);
+    self.contentHeightConstraint = make.height.mas_equalTo(keyboardHeight);
+  }];
+
+  // 背景图铺底（仅在内容容器内）
+  [self.contentView addSubview:self.bgImageView];
+  [self.bgImageView mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.edges.equalTo(self.contentView);
+  }];
+
+  [self.contentView addSubview:self.keyBoardMainView];
+  [self.keyBoardMainView mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.left.right.equalTo(self.contentView);
+    make.bottom.equalTo(self.contentView);
+    self.keyBoardMainHeightConstraint =
+        make.height.mas_equalTo(keyboardBaseHeight);
+  }];
+
+  // 初始隐藏，避免布局完成前闪烁
+  self.contentView.hidden = YES;
+}
+
+#pragma mark - Lazy
+
+- (nullable KBFunctionView *)kb_functionViewIfCreated {
+  return _functionView;
+}
+
+- (UIView *)contentView {
+  if (!_contentView) {
+    _contentView = [[UIView alloc] init];
+    _contentView.backgroundColor = [UIColor clearColor];
+  }
+  return _contentView;
+}
+
+- (UIImageView *)bgImageView {
+  if (!_bgImageView) {
+    _bgImageView = [[UIImageView alloc] init];
+    _bgImageView.contentMode = UIViewContentModeScaleAspectFill;
+    _bgImageView.clipsToBounds = YES;
+  }
+  return _bgImageView;
+}
+
+- (KBKeyBoardMainView *)keyBoardMainView {
+  if (!_keyBoardMainView) {
+    _keyBoardMainView = [[KBKeyBoardMainView alloc] init];
+    _keyBoardMainView.delegate = self;
+  }
+  return _keyBoardMainView;
+}
+
+- (KBFunctionView *)functionView {
+  if (!_functionView) {
+    _functionView = [[KBFunctionView alloc] init];
+    _functionView.delegate = self; // 监听功能面板顶部Bar点击
+  }
+  return _functionView;
+}
+
+- (KBSettingView *)settingView {
+  if (!_settingView) {
+    _settingView = [[KBSettingView alloc] init];
+  }
+  return _settingView;
+}
+
+- (KBChatPanelView *)chatPanelView {
+  if (!_chatPanelView) {
+    NSLog(@"[Keyboard] ⚠️ chatPanelView 被创建！");
+    _chatPanelView = [[KBChatPanelView alloc] init];
+    _chatPanelView.delegate = self;
+  }
+  return _chatPanelView;
+}
+
+- (NSMutableArray<KBChatMessage *> *)chatMessages {
+  if (!_chatMessages) {
+    _chatMessages = [NSMutableArray array];
+  }
+  return _chatMessages;
+}
+
+- (KBKeyboardSubscriptionView *)subscriptionView {
+  if (!_subscriptionView) {
+    _subscriptionView = [[KBKeyboardSubscriptionView alloc] init];
+    _subscriptionView.delegate = self;
+    _subscriptionView.hidden = YES;
+    _subscriptionView.alpha = 0.0;
+  }
+  return _subscriptionView;
+}
+
+@end