标题 | iOS4下实现UIView动画结束后调用 |
范文 | 在写代码时,发现原来3.1.3下经常用的uiview动画结束后调用事件的方法居然不起作用了,摸索了一下,发现ios4下对uivew的animation处理已经有新的方式了,和大家分享一下: 代码功能:在myview向下移出屏幕的动画结束后,触发事件再将myview移除掉。 ios4以前的用法: [UIView beginAnimations:@"View Remove" context:nil]; UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(animationFinish:animationID:finished:context:)]; [UIView setAnimationDuration:0.3f]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; myView.center = CGPointMake(myView.center.x, myView.center.y+480.0); UIView commitAnimations]; - (void)animationFinish:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context { if (animationID == @"View Remove") { [myView removeFromSuperview]; } } Xcode的document已经明确说了setAnimationDidStopSelector :”Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block-based animation methods instead.“,看来这种方法是行不通了,反正在我的模拟器上是不行了,以下是ios4中的实现方法: [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{ settingView.center = CGPointMake(myView.center.x, myView.center.y+480.0); } completion:^(BOOL finished){ if (finished){ [myView removeFromSuperview]; } } ]; 看起来更加简洁方便了,但逻辑似乎没有原来好理解了。 |
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