private void DestroyChild()
{
GameObject.Destroy(child);
week.RemoveListeners();
week = null;
// GC 会在任意时刻调用， ~TestInst 被调用
}
// Use this for initialization
void Start()
{
if (!isInitialid)
{
isInitialid = true;
child = new GameObject("Child");
EventTest test = child.AddComponent <EventTest>();
test.AddEvent();
InvokeRepeating("Send", 2, 2);
Invoke("DestroyChild", 5);
week = new TestInst();
week.AddListeners();
// 实际上，这里还是会调用 week 注册的事件
// 一定要 注销事件
// week = null;
}
}