行为树 （1）--UIToolKit

1、node 

public abstract class Node{

    pubic Enum State{
        Running,
        Success,
        Failure
    }    

    pubic bool started;
    pubic State state=State.Running;
    pubic State Update{
        if (!started){
            started=true;
            Onstart();    
            
        }
       state=  OnUpdate();
       if(state==State.Success||state==State.Failure){

            started=false;
            OnStop();
       }
        return state;
    }

    pubic State abstract OnUpdate;
    pubic void  abstract OnStop;
    pubic void  asbtract OnStart;

}