UI面板管理器-----PanelMgr

using UnityEngine;using System.Collections;using System.Collections.Generic;using System;public class PanelMgr : MonoBehaviour {    //单利    public static PanelMgr _instance;    //场景中的Canvas    PRivate GameObject canvas;    //存放已经打开的UI面板    public Dictionary<string, PanelBase> panelDic;    //存放各层级对应的父物体    private Dictionary<PanelLayer, Transform> layerDic;    void Awake()    {        _instance = this;        InitLayer();        panelDic = new Dictionary<string, PanelBase>();    }    //初始化层    private void InitLayer()    {        canvas = GameObject.Find("Canvas");        if (canvas == null) return;        layerDic = new Dictionary<PanelLayer, Transform>();        foreach (PanelLayer p1 in Enum.GetValues(typeof(PanelLayer)))        {            string name = p1.ToString();            Transform t = canvas.transform.Find(name);            layerDic.Add(p1, t);        }    }    //打开面板    public void OpenPanel<T>(string skinPath,params object[] args) where T:PanelBase    {        string name = typeof(T).ToString();        if (panelDic.ContainsKey(name)) return;        //面板脚本        PanelBase panel = canvas.AddComponent<T>();        panel.Init(args);        panelDic.Add(name, panel);        //加载皮肤        skinPath = (skinPath != "" ? skinPath : panel.skinPath);        GameObject skin = Resources.Load<GameObject>(skinPath);        if (skin == null) return;        panel.skin = (GameObject)Instantiate(skin);        //坐标        Transform skinTrans = panel.skin.transform;        PanelLayer layer = panel.layer;        Transform parent = layerDic[layer];        skinTrans.SetParent(parent, false);        //panel生命周期        panel.OnShowing();        panel.OnShowed();    }    //关闭面板    public void ClosePanel(string name)    {        PanelBase panel = (PanelBase)panelDic[name];        if (panel == null) return;        panel.OnShowing();        panelDic.Remove(name);        panel.OnClosed();        GameObject.Destroy(panel.skin);        Component.Destroy(panel);    }}public enum PanelLayer{    //面板    Panel,    //提示信息    Tips}