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å°†flex ä¸çš„æŸä¸ªç»„件放到显示列表顶层
// description of your code here
function toTop(obj:UIComponent):void{
if(obj.parent){
var parent:UIComponent = UIComponent(obj.parent);
parent.swapChildren(obj,parent.getChildAt(parent.numChildren-1));
if(!(parent is Application)){
toTop(parent);
}
}
}
