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。