UIImageView Tap Gesture在第二次点击时不起作用

Question

我已经在UIImageView上实现了UITapGestureRecognizer，它可以在第一次点击时工作。 首次点击时，我将隐藏该图像并开始动画。 动画完成后，我将再次显示图像。 但是，第二次，我没有得到该UIImageView的Tap事件。

以下是我正在使用的代码：

- (void)viewDidLoad{

[super viewDidLoad];

defaultDogView= [[UIImageView alloc] initWithFrame:CGRectMake(3, 270, 110, 210)];
[defaultDogView setImage:[UIImage imageNamed:@"dog1.png"]];
defaultDogView.userInteractionEnabled = YES;
[self addGestureRecognizersToPiece:defaultDogView];
[self.view addSubview:defaultDogView];

}

- (void)addGestureRecognizersToPiece:(UIImageView *)piece  
{
NSLog(@"in Gesture");
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapPiece:)];
[tapGesture setDelegate:self];    

[piece addGestureRecognizer:tapGesture];
[tapGesture release];

    UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc]  initWithTarget:self action:@selector(longPressPiece:)];
    [piece addGestureRecognizer:longPressGesture];
    [longPressGesture release];

    NSLog(@"%@", [piece gestureRecognizers]);

}
- (void)singleTapPiece:(UITapGestureRecognizer *)gestureRecognizer
{
NSLog(@"Image Tapped");

/** Hide the default Image and start the animation ***/

[defaultDogView setHidden:TRUE];

/***Animating the Dog***/
[dogArray addObject:[SpriteHelpers setupAnimatedDog:self.view numFrames:69        withFilePrefix:@"dog" withDuration:(12) ofType:@"png" withValue:0]];
dogView = [dogArray objectAtIndex:0];

[self performSelector:@selector(callBubbleUpdater) withObject:nil afterDelay:5.5];
}
-(void)showDogFrame{
    NSLog(@"%@",[defaultDogView gestureRecognizers]);
    [defaultDogView setHidden:FALSE];
    defaultDogView.userInteractionEnabled = YES;
}

Answer 1

发现故障。 这是因为我的动画视图重叠在UIImageView上。 完成动画后，我唯一需要做的就是将UIImageView zindex设置为0。我使用以下代码解决了该问题：

//animation stuff

//after animation complition
[self.view bringSubviewToFront:bubbleAlphabetView];