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UITapGestureRecognizer莫名其妙地停止识别轻击手势

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尽可能简单地说，我已经分配给 UIImageView 的 UITapGestureRecognizer 将不可避免地并且莫名其妙地停止触发它所针对的方法 .

它甚至更奇怪，因为有时它只会在一次敲击后停止识别手势，而其他时间则需要数十次敲击才能识别 . 但是，每次都没有失败，它将不可避免地停止 .

我已经尝试将轻拍手势设置为强关联属性，但这没有任何效果 .

我的选择器方法已经运行了，我删除了手势然后重新分配并重新初始化了一个新的 UITapGestureRecognizer 并且没有效果 . 这让我相信问题就在于 UIImageView 而不是 UITapGuestureRecognizer - 但话虽如此，我不知道 .

但是，我正在通过一些 UIView 动画，所以也许有什么可做的呢？

此外， UIImageView 已启用用户交互，我从不禁用它 .

有什么建议？我很乐意发布代码，如果这会有所帮助 . 这是一些代码：

设置UIImageView（图像视图和点击手势都已成为属性，以便我可以强烈关联它们）：

self.cardImageView = [[UIImageView alloc] initWithFrame:frame];
[self.cardImageView setContentMode:UIViewContentModeScaleAspectFill];
[self.cardImageView setClipsToBounds:TRUE];
[self.cardImageView setBackgroundColor:[UIColor nearBlack]];
[self.cardImageView.layer setBorderColor:[[UIColor fiftyGray]CGColor]];
[self.cardImageView.layer setBorderWidth:1.0];
[self.cardImageView setUserInteractionEnabled:TRUE];

self.imageFullScreenTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImageView)];
[self.cardImageView addGestureRecognizer:self.imageFullScreenTap];

[view addSubview:self.cardImageView];

动画：

[UIView animateWithDuration:0.2 animations:^
     {
         [self.cardImageView setFrame:[self frameForImageView]];

         [page setAlpha:!fullscreenTemplate];
         [saveExitButton setAlpha:!fullscreenTemplate];
         [optionsButton setAlpha:!fullscreenTemplate];

         if(fullscreenTemplate)
         {
             [self.cardImageView.layer setBorderColor:[UIColor clearColor].CGColor];
             [self.view setBackgroundColor:[UIColor blackColor]];
         }
         else
         {
             [self.cardImageView.layer setBorderColor:[UIColor fiftyGray].CGColor];
             [self.view setBackgroundColor:[UIColor clearColor]];
         }
     }
     completion:^(BOOL finished)
     {
         [scroller setScrollEnabled:!fullscreenTemplate];

         if (self.imageFullScreenTap)
         {
             [self.cardImageView removeGestureRecognizer:self.imageFullScreenTap];
             self.imageFullScreenTap = nil;
         }

         self.imageFullScreenTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImageView)];
         [self.cardImageView addGestureRecognizer:self.imageFullScreenTap];
     }];
iphone objective-c ios7 uitapgesturerecognizer

3 回答

  • 0
    [UIView transitionWithView:self.cardImageView
                  duration:0.2f 
                   options:UIViewAnimationOptionAllowUserInteraction |
                        UIViewAnimationOptionLayoutSubviews
                animations:^(void) {
                    [self.cardImageView setFrame:[self frameForImageView]];
                    [page setAlpha:!fullscreenTemplate];
                    [saveExitButton setAlpha:!fullscreenTemplate];
                    [optionsButton setAlpha:!fullscreenTemplate];
                    if(fullscreenTemplate) {
                        [self.cardImageView.layer setBorderColor:[UIColor clearColor].CGColor];
                        [self.view setBackgroundColor:[UIColor blackColor]];
                    } else {
                        [self.cardImageView.layer setBorderColor:[UIColor fiftyGray].CGColor];
                        [self.view setBackgroundColor:[UIColor clearColor]];
                    }
                } completion:^(BOOL finished) {
                    [scroller setScrollEnabled:!fullscreenTemplate];
                }];

    上面的代码用 transitionWithView:duration:options:animations:completion: 方法更改了 animateWithDuration:completion: 方法 . Importent keyWord这里是 UIViewAnimationOptionAllowUserInteraction . 这将允许在图像动画时进行userInteraction .

    如果TapGesture在一段时间后仍然停止识别，请向我显示 tapImageView 方法的代码 .

    回复于
  • 1

    使用 UIViewAnimationOptionAllowUserInteraction 和 bringSubviewToFront

    [view addSubview:self.cardImageView];
[view bringSubviewToFront:self.cardImageView];

    动画：

    [UIView animateWithDuration:0.2
                          delay:0.0         
                        options:UIViewAnimationOptionAllowUserInteraction
                     animations:^
                             {
                                [self.cardImageView setFrame:[self frameForImageView]];

                                [page setAlpha:!fullscreenTemplate];
                                [saveExitButton setAlpha:!fullscreenTemplate];
                                [optionsButton setAlpha:!fullscreenTemplate];

                                if(fullscreenTemplate)
                                {
                                  [self.cardImageView.layer setBorderColor:[UIColor clearColor].CGColor];
                                  [self.view setBackgroundColor:[UIColor blackColor]];
                                }
                                else
                                {
                                  [self.cardImageView.layer setBorderColor:[UIColor fiftyGray].CGColor];
                                  [self.view setBackgroundColor:[UIColor clearColor]];
                                }
                             }
                             completion:^(BOOL finished)
                             {
                               [scroller setScrollEnabled:!fullscreenTemplate];

                               if (self.imageFullScreenTap)
                               {
                                 [self.cardImageView removeGestureRecognizer:self.imageFullScreenTap];
                                 self.imageFullScreenTap = nil;
                                } 

                                self.imageFullScreenTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImageView)];
                                [self.cardImageView addGestureRecognizer:self.imageFullScreenTap];
                             }];
    回复于
  • 0

    如果你在某个时候将imageview添加到uiscrollview，那么我担心手势识别器大多数时候都不会工作 . 或者您尝试在父视图上启用userinteraction .

    回复于

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