UIView 内 UIImageview 上的 UISwipeGestureRecognizer 检测到错误的滑动​​？

Question

我在检测 self.view 内的 UIImageView 上的滑动时遇​​到问题。

当我在 self.view 上应用 UISwipeGestureRecognizer 时，它工作正常，但是当我尝试在 UIImageview 上应用相同的操作时，它检测到错误的滑动​​方向。

代码：

{

//Swipe Up
swipeUpRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeUp:)];
swipeUpRecognizer.delegate = self;
swipeUpRecognizer = (UISwipeGestureRecognizer *)swipeUpRecognizer;
swipeUpRecognizer.numberOfTouchesRequired = 1;
swipeUpRecognizer.direction = UISwipeGestureRecognizerDirectionUp;
[imageView addGestureRecognizer:swipeUpRecognizer];
[swipeUpRecognizer release];

//swipe Down
swipeDownRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeDown:)];
swipeDownRecognizer.delegate = self;
swipeDownRecognizer = (UISwipeGestureRecognizer *)swipeDownRecognizer;
swipeDownRecognizer.numberOfTouchesRequired = 1;
swipeDownRecognizer.direction = UISwipeGestureRecognizerDirectionDown;
[imageView addGestureRecognizer:swipeDownRecognizer];
[swipeDownRecognizer release];

//swipe Left
swipeLeftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeLeft:)];
swipeLeftRecognizer.delegate = self;
swipeLeftRecognizer = (UISwipeGestureRecognizer *)swipeLeftRecognizer;
swipeLeftRecognizer.numberOfTouchesRequired = 1;
swipeLeftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[imageView addGestureRecognizer:swipeLeftRecognizer];
[swipeLeftRecognizer release];

//swipe Right
swipeRightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeRight:)];
swipeRightRecognizer.delegate = self;
swipeRightRecognizer = (UISwipeGestureRecognizer *)swipeRightRecognizer;
swipeRightRecognizer.numberOfTouchesRequired = 1;
swipeRightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[imageView addGestureRecognizer:swipeRightRecognizer];
[swipeRightRecognizer release];

}

Answer 1

您必须在 UIImageView 上启用用户交互。使用下面的代码

imageView.userInteractionEnabled = YES;