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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;
随便看

 

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更新时间:2025/5/17 6:02:24