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更改uiswitch上的text

為要更改text的uiswitch建立ib連接：例如myswitch,在代碼中改變文字：

((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在寫代碼時，發現原來3.1.3下經常用的uiview動畫結束后調用事件的方法居然不起作用了，摸索了一下，發現ios4下對uivew的animation處理已經有新的方式了，和大家分享一下：

代碼功能：在myview向下移出屏幕的動畫結束后，觸發事件再將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已經明確說了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中的實現方法：

[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];

}

}

];

看起來更加簡潔方便了，但邏輯似乎沒有原來好理解了。r;

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