libGDX : How check if the actor exist on stage or not

问题

How can I check the actor is removed or not on stage ?

like this:

if(actor.isRemoved) {
   // enter code here
}

回答1:

From the Documentation:

getStage

public Stage getStage() Returns the stage that this actor is currently in, or null if not in a stage.

So you can use it like:

if(actor.getStage() == null) {
    //actor not on stage
}

来源：https://stackoverflow.com/questions/33270598/libgdx-how-check-if-the-actor-exist-on-stage-or-not