Question

如何添加UIGestureRecognizer来识别UIImageView顶部的左右滑动？我只需要在离开滑动时调用一个动作，而在滑动时则需要另一个动作。

Answer 1

创建2个滑动手势并将其添加到图像视图中。

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

你有没有设置

@property(nonatomic, getter=isUserInteractionEnabled) BOOL userInteractionEnabled

在附加UIGestureRecognizer之前

为true？

如果没有尝试

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imageview添加到临时视图

如何在UIImageView上设置UIGestureRecognizer？

2 个答案: