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Event.FRAME_CONSTRUCTED

 
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_oPBox是个MovieClip,共3帧,其中第1帧有个TextField,名字叫txt_leftTime。

 

_oPBox.gotoAndStop(1);

_oPBox.getChildByName("txt_leftTime") as TextField

 

在某些情况下,我发现getChildByName会失效,即取到的对象变成了null.

 

后来查到了原因,在MovieClip使用gotoAndStop切换帧的时候,都会重新初始化里面的变量和内容。当未初始化完毕时,去取getChildByName,就有可能取不到。

 

解决办法是:

_oPBox.addEventListener(Event.FRAME_CONSTRUCTED, constructedHandler);

_oPBox.gotoAndStop(1);

 

然后在constructedHandler中去取_oPBox.getChildByName("txt_leftTime") as TextField

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