//注册辅助函数
private void RegisterEvent(Dictionary <EventSignalEnum, List <ReceiverHolder> > eventDict, EventSignalEnum eventSignal, Object tag, Object receiver)
{
List <ReceiverHolder> receiverList = TryGetFromDict(eventDict, eventSignal);
//将接收器封装到Holder中
ReceiverHolder receiverHolder = new ReceiverHolder(receiver, receiverList);
receiverList.Add(receiverHolder);
//将相应接收器按tag进行记录
AddToTagList(tag, receiverHolder);
}
//记录对应Tag的接收器
private void AddToTagList(Object tag, ReceiverHolder receiverHolder)
{
List <ReceiverHolder> receiverHolderList = TryGetFromDict(mReceiverTagDict, tag);
receiverHolderList.Add(receiverHolder);
}