问题
Is it possible to arrange (z) order of objects in Flash with ActionScript 3?
e.g. I have 3 symbol instances on a given layer, and I want to perform the equivalent of 'Bring to Front', 'Bring Forward', and/or target a certain z position.
回答1:
You can change the z-index (stacking order) of a movie clip within a same layer using action script like this.
parent.setChildIndex(childObject, i)
Change childObject to the name of the movie clip you want to change the z-index, change i to an integer (the desired z-index value).
If you want to make this happen on a mouse event, put above code inside a function and attach an event listener to a button to invoke this function on a mouse event.
回答2:
Bring to front would be something like:
myObject.parent.setChildIndex( myObject, myObject.parent.numChildren - 1);
Bring forward would be something like:
myObject.parent.setChildIndex( myObject, myObject.parent.getChildIndex( myObject ) + 1);
Setting a specific z index would be:
myObject.parent.setChildIndex( myObject, newZIndex);
来源：https://stackoverflow.com/questions/3865426/arrange-z-order-of-objects-in-flash-with-actionscript-3