Unity 监听Button Interactable状态

通过继承Button 重写DoStateTransition方法来监测Button的Interactable状态，外部可以在InteractableChanged添加绑定监听方法

	
public class MyButton : Button


	
{


	
	public event Action<bool> InteractableChanged;


	
    protected override void DoStateTransition(SelectionState state, bool instant)


	
    {


	
        if (state == SelectionState.Disabled)


	
        {


	
            InteractableChanged?.Invoke(interactable);


	
        }


	
        else if (state == SelectionState.Normal)


	
        {


	
            InteractableChanged?.Invoke(interactable);


	
        }


	
    }


	
}