添加功能组件

CustomKeyboard/View/KBFunctionBarView.h

@@ -10,8 +10,20 @@
 NS_ASSUME_NONNULL_BEGIN
 
 /// 功能区顶部的Bar：左侧4个按钮，右侧3个按钮
+@class KBFunctionBarView;
+
+@protocol KBFunctionBarViewDelegate <NSObject>
+@optional
+/// 左侧 4 个按钮点击（index: 0~3）
+- (void)functionBarView:(KBFunctionBarView *)bar didTapLeftAtIndex:(NSInteger)index;
+/// 右侧 3 个按钮点击（index: 0~2）
+- (void)functionBarView:(KBFunctionBarView *)bar didTapRightAtIndex:(NSInteger)index;
+@end
+
 @interface KBFunctionBarView : UIView
 
+@property (nonatomic, weak, nullable) id<KBFunctionBarViewDelegate> delegate;
+
 /// 左侧4个按钮（懒加载创建，等宽水平排布）
 @property (nonatomic, strong, readonly) NSArray<UIButton *> *leftButtons;
 

CustomKeyboard/View/KBFunctionBarView.m

@@ -59,6 +59,7 @@
     for (NSInteger i = 0; i < 4; i++) {
         UIButton *btn = [self buildButtonWithTitle:(i < self.leftTitles.count ? self.leftTitles[i] : [NSString stringWithFormat:@"L%ld", (long)i])];
         btn.tag = 100 + i;
+        [btn addTarget:self action:@selector(onLeftTap:) forControlEvents:UIControlEventTouchUpInside];
         [self.leftContainer addSubview:btn];
         [btn mas_makeConstraints:^(MASConstraintMaker *make) {
             if (prev) {
@@ -84,6 +85,7 @@
         UIButton *btn = [self buildButtonWithTitle:(i < self.rightTitles.count ? self.rightTitles[i] : [NSString stringWithFormat:@"R%ld", (long)i])];
         btn.tag = 200 + i;
         [self.rightContainer addSubview:btn];
+        [btn addTarget:self action:@selector(onRightTap:) forControlEvents:UIControlEventTouchUpInside];
         [rightBtns addObject:btn];
     }
 
@@ -112,6 +114,22 @@
     self.rightButtonsInternal = rightBtns.copy;
 }
 
+#pragma mark - Actions
+
+- (void)onLeftTap:(UIButton *)sender {
+    NSInteger idx = sender.tag - 100;
+    if ([self.delegate respondsToSelector:@selector(functionBarView:didTapLeftAtIndex:)]) {
+        [self.delegate functionBarView:self didTapLeftAtIndex:idx];
+    }
+}
+
+- (void)onRightTap:(UIButton *)sender {
+    NSInteger idx = sender.tag - 200;
+    if ([self.delegate respondsToSelector:@selector(functionBarView:didTapRightAtIndex:)]) {
+        [self.delegate functionBarView:self didTapRightAtIndex:idx];
+    }
+}
+
 - (UIButton *)buildButtonWithTitle:(NSString *)title {
     UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
     btn.layer.cornerRadius = 18;

CustomKeyboard/View/KBFunctionView.m

@@ -13,7 +13,7 @@
 
 static NSString * const kKBFunctionTagCellId = @"KBFunctionTagCellId";
 
-@interface KBFunctionView () <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
+@interface KBFunctionView () <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, KBFunctionBarViewDelegate>
 // UI
 @property (nonatomic, strong) KBFunctionBarView *barViewInternal;
 @property (nonatomic, strong) KBFunctionPasteView *pasteViewInternal;
@@ -161,10 +161,24 @@ static NSString * const kKBFunctionTagCellId = @"KBFunctionTagCellId";
 - (KBFunctionBarView *)barViewInternal {
     if (!_barViewInternal) {
         _barViewInternal = [[KBFunctionBarView alloc] init];
+        _barViewInternal.delegate = self; // 顶部功能Bar事件下发到本View
     }
     return _barViewInternal;
 }
 
+#pragma mark - KBFunctionBarViewDelegate
+
+- (void)functionBarView:(KBFunctionBarView *)bar didTapLeftAtIndex:(NSInteger)index {
+    // 将事件继续透传给上层（如键盘控制器），用于切换界面或其它业务
+    if ([self.delegate respondsToSelector:@selector(functionView:didTapToolActionAtIndex:)]) {
+        [self.delegate functionView:self didTapToolActionAtIndex:index];
+    }
+}
+
+- (void)functionBarView:(KBFunctionBarView *)bar didTapRightAtIndex:(NSInteger)index {
+    // 右侧按钮点击，如收藏/宫格等，按需继续向外抛出（这里暂不定义单独协议方法，可在此内部处理或扩展）
+}
+
 - (KBFunctionPasteView *)pasteViewInternal {
     if (!_pasteViewInternal) {
         _pasteViewInternal = [[KBFunctionPasteView alloc] init];