Unity使用委托，事件

public class EventSender : MonoBehaviour {

    //定义一个委托
    public delegate void delGameOver();
    //事件是委托的实例，该实例可在外部持有方法的引用
    public event delGameOver GameOver;
    private int score=0;
    private bool isGameOver = false;

    // Update is called once per frame
    void Update () {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            score++;
        }
        if (score >= 5&&!isGameOver)
        {
            //发送游戏结束事件到各个类中
            GameOver();
            isGameOver = true;
        }
	}
}

public class EventListener : MonoBehaviour {

	void Start () {
        //监听该事件，事件启动则调用OnGameOver方法
        GetComponent<EventSender>().GameOver += OnGameOver;
	}
	
    void OnGameOver()
    {
        Debug.Log("GameOver");
    }

}