Ios 如何知道是否已将UITapGestureRecognizer添加到子视图

我正在添加子视图。对于每个子视图，我将添加一个手势识别器：

UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    imageView.frame = CGRectMake((position*1024)+200,0,image.size.width,image.size.height);
    UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc]
                                               initWithTarget:self action:@selector(singleFingerTap:)];
    singleFingerTap.numberOfTapsRequired = 1;
    [imageView addGestureRecognizer:singleFingerTap];
    [singleFingerTap release];

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但是点击没有响应如何验证手势是否已被添加到子视图？

在代码后添加此项：

NSLog(@"imageView.gestureRecognizers: %@", [imageView.gestureRecognizers description]);

如果您正确添加了手势识别器，它会将每个手势识别器的描述打印到控制台。如果不是，它将在控制台中显示（NULL）或空数组

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您还可以设置手势识别器代理：

[singleFingerTap setDelegate:self];

然后添加委托方法并设置断点以确保调用它：

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    NSLog(@"gestureRecognizerShouldBegin: called");
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    NSLog(@"shouldReceiveTouch: called");
    return YES;
}

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如果要获取视图的属性，请点击。如何实现此方法：-（void）viewTap:（UIGestureRecognitor*）sender