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(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。r;
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