unity3d UIButton添加点击事件

public UIButton startButtonUser;//开始界面用户登录按钮
void Awake()
{
    //初始化参数
    startButtonUser = transform.FindChild("start/ButtonUser").GetComponent<UIButton>();

    //定义事件
    EventDelegate btnUserEvent = new EventDelegate(this,"OnStartButtonUserClick");
    startButtonUser.onClick.Add (btnUserEvent);
}

定义事件

public void OnStartButtonUserClick()
{
    Debug.Log ("On StartButtonUser Click...");
}