我有一個看起來像這樣的視圖層次結構：UIView (A)UIView > UIImageViewUIView > UIView (B)UIView > UIView (B) > Rounded Rect ButtonUIView > UIView (B) > UIImageViewUIView > UIView (B) > UILabel我已將手勢識別器附加到我的UIView（B）。我面臨的問題是我沒有對UIView（B）內的Rounded Rect Button采取任何操作。singleTap手勢識別器捕獲/覆蓋按鈕的“ Touch Up Inside”事件。我該如何運作？我認為響應者鏈層次結構將確保將優先考慮按鈕觸摸事件，并且它將被觸發！我想念什么？以下是一些相關代碼：#pragma mark -#pragma mark View lifecycle (Gesture recognizer setup)- (void)viewDidLoad {    [super viewDidLoad];    // double tap gesture recognizer    UITapGestureRecognizer *dtapGestureRecognize = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTapGestureRecognizer:)];    dtapGestureRecognize.delegate = self;    dtapGestureRecognize.numberOfTapsRequired = 2;    [self.viewB addGestureRecognizer:dtapGestureRecognize];    // single tap gesture recognizer    UITapGestureRecognizer *tapGestureRecognize = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapGestureRecognizer:)];    tapGestureRecognize.delegate = self;    tapGestureRecognize.numberOfTapsRequired = 1;    [tapGestureRecognize requireGestureRecognizerToFail:dtapGestureRecognize];    [self.viewB addGestureRecognizer:tapGestureRecognize];    // add gesture recodgnizer to the grid view to start the edit mode    UILongPressGestureRecognizer *pahGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureRecognizerStateChanged:)];    pahGestureRecognizer.delegate = self;    pahGestureRecognizer.minimumPressDuration = 0.5;    [self.viewB addGestureRecognizer:pahGestureRecognizer];    [dtapGestureRecognize release];    [tapGestureRecognize release];    [pahGestureRecognizer release];}#pragma mark -#pragma mark Button actions- (IBAction)buttonTouchUpInside:(id)sender {    NSLog(@"%s, %@", __FUNCTION__, sender);}#pragma mark -#pragma mark Gesture recognizer actions- (void)singleTapGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer {    NSLog(@"%s", __FUNCTION__);}