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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