xcode 停止 UIView 动画
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Stop an UIView Animation
提问by alexclp
Possible Duplicate:
Cancel a UIView animation?
可能的重复：
取消 UIView 动画？
I have the following animation and i want to stop it when i press a button. Can you please tell me how can i do it? I can't figure it out how. Thanks.
我有以下动画，我想在按下按钮时停止它。你能告诉我我该怎么做吗？我想不通怎么办 谢谢。
-(void)animationLoop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
[UIView beginAnimations:@"Move randomly" context:nil];
[UIView setAnimationDuration:1];
// [UIView setAnimationBeginsFromCurrentState:NO];
CGFloat x = (CGFloat) (arc4random() % (int) self.bounds.size.width);
CGFloat y = (CGFloat) (arc4random() % (int) self.bounds.size.height);
CGPoint squarePostion = CGPointMake(x, y);
strechView.center = squarePostion;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationLoop:finished:context:)];
[UIView commitAnimations];
}
回答by gdavis
Try this:
尝试这个：
[myView.layer removeAllAnimations];
and be sure to import the Quartz framework as well:
并确保导入 Quartz 框架：
#import <QuartzCore/QuartzCore.h>
Animations are applied using CoreAnimation in the QuartzCore framework, even the UIView animation methods. Just target the view's layer that you want to stop animating, and remove its animations.
使用 QuartzCore 框架中的 CoreAnimation 应用动画，甚至是 UIView 动画方法。只需定位要停止动画的视图层，并删除其动画。
回答by pasawaya
You could do this:
你可以这样做：
[self.view.layer removeAnimationForKey:@"Move randomly"];
This is more effective than calling [self.view.layer removeAllAnimations]because this can potentially remove other animations that you would want to keep.
这比调用更有效，[self.view.layer removeAllAnimations]因为这可能会删除您想要保留的其他动画。
回答by folex
You can just change the object/property that currently animated. It will stop animation.
您可以更改当前动画的对象/属性。它会停止动画。
回答by TedCheng
I suggest you use NSTimer.
我建议你使用 NSTimer。
NSTimer *myTimer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(yourAnimation) userInfo:nil repeats:YES];
- (void)responseToButton:(UIButton *) _button {
//when you want to stop the animation
[myTimer invalidate];
}
- (void)yourAnimation {
// move the view to a random point
}
Besides, you can set the NSTimer works on another thread so that the main thread can response when you press even your TimeInterval value is very small
此外，您可以将 NSTimer 设置在另一个线程上工作，这样即使您的 TimeInterval 值很小，主线程也可以响应
