标题 | ios4下实现uiview动画结束后调用 |
内容 | 更改uiswitch上的text 为要更改text的uiswitch建立ib连接:例如myswitch,在代码中改变文字: ((uilabel *)[[[[[[self.myswitch subviews] lastobject] subviews] objectatindex:2] subviews] objectatindex:0]).text = @foo; ((uilabel *)[[[[[[self.myswitch subviews] lastobject] subviews] objectatindex:2] subviews] objectatindex:1]).text = @ba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。r; |
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