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我有一个带有一个的subview，主视图有一个。我已经将唯一添加到这样的视图中：imageviewPanGestureRecognizerLongPressGestureRecognizerlongpress

screenRecognize = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(screenTaped:)];
screenRecognize.minimumPressDuration = 0.0;
self.userInteractionEnabled = YES;
[self addGestureRecognizer:screenRecognize];

这是图像视图：

imageViewPanRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewPulled:)];

imageView = [[UIImageView alloc] initWithFrame:CGRectMake(310, 50, 10, 40)];
imageView.image = [UIImage imageNamed:@"image.png"];
imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:imageViewPanRecognizer];
[self addSubview:imageView];

当我触摸 时imageView，UILongPressRecognizer被触发。为什么是这样？

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2 回答 2

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答案已经在你的问题中了。你设置

screenRecognize.minimumPressDuration = 0.0;

这意味着，UILongPressGestureRecognizer 将像 UITapGestureRecognizer 一样工作。按线

[self addGestureRecognizer:screenRecognize];

你在整个自我上激活了这个手势。

现在，当您在self中添加imageView 时，imageView 还将响应 UILongPressGestureRecognizer 以及仅在 imageView 上处于活动状态的 UIPanGestureRecognizer。因此，触摸 imageView 会触发 UILongPressGestureRecognizer。


要解决此问题，您可以尝试增加minimumPressDuration值。

于 2013-07-04T12:06:27.630 回答
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1) 为什么要使用 minimumPressDuration=0 的长手势？不能正确使用平移手势？

2）如果您希望手势协同工作，请尝试以下操作：

longGesture.delegate = self;
...
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

3）如果您希望用户平移到 UIImageView 长手势禁用，请尝试以下操作：

self.tag = 1;
longGesture.delegate = self;
...
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    return touch.view.tag == 1;
}
于 2013-07-04T12:17:47.393 回答