Xcode:为什么我的翻转动画翻转两次?
问题描述:
我有一个小问题。我有一个拥有UILongPressGestureRecognicer的UILabel。当调用UILongPressGestureRecognizer时,我的应用程序应该使用翻转动画切换到新视图。Xcode:为什么我的翻转动画翻转两次?
这是我用过的GestureRecognizer代码:
UILongPressGestureRecognizer *labelLongPressRecognizer;
labelLongPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LoadLabelSettings:)];
labelLongPressRecognizer.numberOfTouchesRequired = 1;
labelLongPressRecognizer.minimumPressDuration = 2.0;
[NewLabel addGestureRecognizer:labelLongPressRecognizer];
,这是该视图的代码转换动画:
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:self.view cache:NO];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:1.0];
[self.view addSubview:LabelSettingsViewController.view];
[UIView commitAnimations];
if (self.interfaceOrientation == UIInterfaceOrientationLandscapeRight || self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
LabelSettingsViewController.view.frame = CGRectMake(0, 0, 480, 300);
}
我的问题是,当我按住我的UILabel开关动画开始,但是当我释放时,它会再次重复动画。所以基本上动画发生两次,我只希望它发生一次。
任何想法?
感谢提前:)
答
您检查发件人状态,例如,
- (void)LoadLabelSettings:(UILongPressGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded) // or whatever
// then do the flipping stuff
}
检查出的“UILongPressGestureRecognizer类参考”,其中谈到了长按是的“概述”连续的,我推测可能触发大量事件: