keyboard/CustomKeyboard/KeyboardViewControllerHelp/KeyboardViewController+UI.m

//
//  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