我正在编写代码以在 View 上上下移动我的两根手指以更改某些状态。代码如下:
UISwipeGestureRecognizer *aSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
[aSwipeGesture setDirection:UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown];
aSwipeGesture.numberOfTouchesRequired = 2;
[self.View addGestureRecognizer:aSwipeGesture];
- (void)swipeGesture:(UISwipeGestureRecognizer *)sender {
NSLog(@"Swipe received.");
if (sender.direction==UISwipeGestureRecognizerDirectionUp) {
NSLog(@"swipe up");
} else if (sender.direction==UISwipeGestureRecognizerDirectionDown) {
NSLog(@"swipe down");
}
}
然而,我唯一能收到的打印日志是收到的刷卡,如下所示。我无法收到向上滑动或向下滑动的消息,我是不是错过了什么?谢谢
ViewController.m:228 Swipe received.
ViewController.m:228 Swipe received.
ViewController.m:228 Swipe received.
ViewController.m:228 Swipe received.
ViewController.m:228 Swipe received.
ViewController.m:228 Swipe received.
更新:我必须用两根手指才能完成滑动 Action 。
最佳答案
试试这个
UISwipeGestureRecognizer *aSwipeGestureUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
[aSwipeGesture setDirection:UISwipeGestureRecognizerDirectionUp];
aSwipeGestureUp.numberOfTouchesRequired = 2;
[self.View addGestureRecognizer:aSwipeGestureUp];
UISwipeGestureRecognizer *aSwipeGestureDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
[aSwipeGestureDown setDirection:UISwipeGestureRecognizerDirectionDown];
aSwipeGestureDown.numberOfTouchesRequired = 2;
[self.View addGestureRecognizer:aSwipeGestureDown];
关于ios - 无法正确获取 UISwipeGestureRecognizer 方向,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16184539/