private void Start()
{
cardManager = new CardManager();
Task task = new Task();
//设置任务目标5张牌
task.SetTarget(5);
//绑定监听
cardManager.AddGetCardListener(task.TaskCallback);
_action = () => { Debug.Log("第一次绑定委托"); };
_action += () => { Debug.Log("第二次绑定委托"); };
_action += () => { Debug.Log("第三次绑定委托"); };
}