One of event management

public enum EUIMgrEvent
{
    onUILogInOpend,
    onUILogInClose,

    onUIHintOpend,
    onUIHintClose,

    onUIWorkOpend, 
    onUIWorkClose,

    onUIShopOpend,
    onUIShopClose

}

First create several event types , Then add the event type , Trigger , Delete and other operations ..........

1. Create a dictionary to save events

 Dictionary<EUIMgrEvent, Action<object, object[]>> _phList = new Dictionary<EUIMgrEvent, Action<object, object[]>>();

2. Add event

 public void addEventHandler(EUIMgrEvent eventID,Action<object, object[]> handler)
    {
        if (_phList == null) return;
        if (_phList.ContainsKey(eventID))
        {
            Debug.LogError(string.Format("error: event[ {0} ] already exists", eventID));
            return;
        }
        _phList[eventID] = handler;
    }

3. Delete event

public void delEventHandler(EUIMgrEvent eventID)
    {
        if (_phList == null) return;
        if (!_phList.ContainsKey(eventID))
        {
            Debug.LogError(string.Format("error: event[ {0} ] not exists", eventID));
            return;
        }
        _phList.Remove(eventID);
    }

4. Triggering event  

public void fireEvent(EUIMgrEvent eventID,object sender ,object[] args)
    {
        if (_phList == null) return;
        if (!_phList.ContainsKey(eventID)){
            return;
        }

        var action = _phList[eventID];
        if (action == null) return;
            action(sender, args);
    }

5. Reset event system

public void Reset()
    {
        if (_phList == null) return;
        _phList.Clear();
        _phList = null;
    }