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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