flash as3拖动剪辑时，提供的DisplayObject必须是调用者的子节点
所有我想要做的就是设置拖动我的电影剪辑，但我一直收到这个错误：
The supplied DisplayObject must be a child of the caller.
projectThumb.addEventListener( MouseEvent.MOUSE_DOWN, onThumbPress );
projectThumb.addEventListener( MouseEvent.MOUSE_UP, onThumbRelease );
function onThumbPress( e:MouseEvent ):void
{
setChildIndex( e.target as MovieClip, numChildren - 1 );
e.target.startDrag();
}
function onThumbRelease( e:MouseEvent ):void
{
e.target.stopDrag();
}
没有找到相关结果
已邀请:
2 个回复
体悉
。很可能正在返回。 确保你保证始终是有效的（如果类型不匹配，请记住将返回），或在那里添加的支票。目浆搽
以查看ti是什么。如果要转换非相关类（非MovieClip或MovieClip派生类），那么您将获得null。 你可以做一个while语句来查找作为projectThumb的父项，或者只是假设它是父项。另一种方法是添加透明按钮，覆盖projectThumb的大小，以便你知道调用click事件监听器是什么 尝试...projectThumb.addEventListener( MouseEvent.MOUSE_DOWN, onThumbPress ); projectThumb.addEventListener( MouseEvent.MOUSE_UP, onThumbRelease ); function onThumbPress( e:MouseEvent ):void { var target:MovieClip = findPT(e.target as DisplayObject) as MovieClip; if(target){ setChildIndex(target, numChildren - 1 ); target.startDrag(); } } function onThumbRelease( e:MouseEvent ):void { var target:MovieClip = findPT(e.target as DisplayObject) as MovieClip; if(target){ target.stopDrag(); } } function findPT($mc:DisplayObject):DisplayObject{ while (1){ if ($mc is ProjectThumb){ // <- this is to check for the right class return $mc; }else if($mc.parent == null){ return null }else{ $mc = $mc.parent as DisplayObject; } } return null }