游戏里建筑深度调整代码（做个记录）

/**

* 深度

*/

public function changeDepth(obj:DisplayObject):void

{

var index:int = this.getChildIndex(obj);

var num:int = this.numChildren;

var nextObj:DisplayObject = index < num - 1 ? this.getChildAt(index + 1):obj;

if (obj.y > nextObj.y)

{

while (index < num - 1)

{

if (obj.y > this.getChildAt(index + 1).y)

{

this.swapChildrenAt(index, index + 1);

index++;

} else {

break;

}

}

} else {

while (index > 0)

{

if (obj.y < this.getChildAt(index - 1).y)

{

this.swapChildrenAt(index, index - 1);

index--;

} else {

break;

}

}

}

}