xcode 如何在 UIImageView 上设置 UIGestureRecognizer？
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How can I set up a UIGestureRecognizer on a UIImageView?
提问by pixelbitlabs
How can I add a UIGestureRecognizer to recognise left or right swipes on top of a UIImageView? I just need an action to be called when the swipe is left and another action for when the swipe is right.
如何添加 UIGestureRecognizer 以识别 UIImageView 顶部的向左或向右滑动？我只需要在向左滑动时调用一个动作，在向右滑动时调用另一个动作。
回答by Louie
Create 2 swipe gestures and add them to your image view.
创建 2 个滑动手势并将它们添加到您的图像视图中。
UISwipeGestureRecognizer * recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(myRightAction)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
[myImageView addGestureRecognizer:recognizer];
[recognizer release];
UISwipeGestureRecognizer * recognizer2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(myLeftAction)];
[recognizer2 setDirection:(UISwipeGestureRecognizerDirectionLeft)];
[myImageView addGestureRecognizer:recognizer2];
[recognizer2 release];
回答by DanZimm
Have you set
你设置了吗
@property(nonatomic, getter=isUserInteractionEnabled) BOOL userInteractionEnabled
to true before you attach the UIGestureRecognizer?
在附加之前为真UIGestureRecognizer？
If not try that
如果不试试
If that doesn't work, you could add a temp view and add the gesture recognizer to the temp view and then add the imageview to the temp view
如果这不起作用，您可以添加临时视图并将手势识别器添加到临时视图，然后将图像视图添加到临时视图
