手势识别器和按钮动作

Question

我有一个看起来像这样的视图层次结构：

UIView (A)

UIView > UIImageView

UIView > UIView (B)

UIView > UIView (B) > Rounded Rect Button

UIView > UIView (B) > UIImageView

UIView > UIView (B) > UILabel

我已将手势识别器附加到我的UIView（B）。我面临的问题是我没有对UIView（B）内的Rounded Rect Button采取任何操作。singleTap手势识别器捕获/覆盖按钮的“ Touch Up Inside”事件。

我该如何运作？我认为响应者链层次结构将确保将优先考虑按钮触摸事件，并且它将被触发！我想念什么？

以下是一些相关代码：

#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__);

}

Answer 1

在“ shouldReceiveTouch”方法中，应添加一个条件，如果触摸按钮，则该条件将返回NO。这来自苹果的SimpleGestureRecognizers示例。- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {    // Disallow recognition of tap gestures in the segmented control.    if ((touch.view == yourButton)) {//change it to your condition        return NO;    }    return YES;}希望对你有帮助正如丹尼尔（Daniel）指出的那样，您必须遵守UIGestureRecognizerDelegate它才能正常工作。