在寫(xiě)代碼時(shí)，發(fā)現(xiàn)原來(lái)3.1.3下經(jīng)常用的uiview動(dòng)畫(huà)結(jié)束后調(diào)用事件的方法居然不起作用了，摸索了一下，發(fā)現(xiàn)ios4下對(duì)uivew的animation處理已經(jīng)有新的方式了，和大家分享一下：

代碼功能：在myview向下移出屏幕的動(dòng)畫(huà)結(jié)束后，觸發(fā)事件再將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已經(jīng)明確說(shuō)了setAnimationDidStopSelector ：”Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block-based animation methods instead.“，看來(lái)這種方法是行不通了，反正在我的模擬器上是不行了，以下是ios4中的實(shí)現(xiàn)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];

}

}

];

看起來(lái)更加簡(jiǎn)潔方便了，但邏輯似乎沒(méi)有原來(lái)好理解了。

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