Question

我在ViewController的viewDidLoad中有这段代码

UILongPressGestureRecognizer* gestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(_handleLongPress:)];
gestureRecognizer.numberOfTouchesRequired = 1;
gestureRecognizer.minimumPressDuration = 5.0;
gestureRecognizer.delegate = self;
[self.view addGestureRecognizer:gestureRecognizer];
NSLog(@"Gesture recognizers = %@",self.view.gestureRecognizers);

和方法

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    return YES;
}

- (void) _handleLongPress:(UIGestureRecognizer *)sender
{
     if (sender.state == UIGestureRecognizerStateBegan)
         NSLog(@"Started");
}

当我运行此应用并点击视图5秒钟时，_handleLongPress会触发，但是当我在设备上运行相同的应用时，它永远不会点击_handleLongPress方法。我是什么意思失踪？我确实看到了长按的输出：

2014-08-01 10:00:48.505 TestConsole[1343:60b] Gesture recognizers = ( "UILongPressGestureRecognizer: 0x14644d30; state = Possible; view = UIView 0x1453f950>; target= <(action= _handleLongPress:, target=MyViewController 0x1463a730>)>"

我把断点放在gestureRecognizer:shouldReceiveTouch:，它确实击中了UILongPressGestureRecognizer ..我傻眼了！

UILongPressGestureRecognizer适用于模拟器，但从不在设备上运行

0 个答案: