如何在 UIImageView 上设置 UIGestureRecognizer？

Question

如何添加 UIGestureRecognizer 来识别 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操作，在向右滑动时调用另一个操作。

Answer 1

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];

Answer 2

是否设置

@property(nonatomic, getter=isUserInteractionEnabled) BOOL userInteractionEnabled

在附加 UIGestureRecognizer 之前

为 true？如果不尝试，

如果这不起作用，您可以添加一个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