12.Unity3D商业游戏源码研究-变身吧主公-层级管理-LayerMgr

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;

public class LayerMgr : MonoBehaviour
{
#region 初始化
private static LayerMgr mInstance;
public static bool hasIntance
{
get
{
return mInstance != null;
}
}

/// <summary>
/// 是否正在删除，当程序退出时设置为true
/// </summary>
public static bool isDestorying = false;

public static LayerMgr GetInstance()
{
if (!hasIntance)
{
if (isDestorying)
{
return null;
}
mInstance = new GameObject("_LayerMgr").AddComponent<LayerMgr>();
}
return mInstance;
}
void OnApplicationQuit()
{
isDestorying = true;
}

private LayerMgr()
{
mLayerDic = new Dictionary<LayerType, GameObject>();

}
private void OnDestroy()
{
mLayerDic.Clear();
mLayerDic = null;
}
#endregion

private Dictionary<LayerType, GameObject> mLayerDic;
private Transform mParent;

public void SetLayer(GameObject current,LayerType type)
{
if(mLayerDic.Count < Enum.GetNames(typeof(LayerType)).Length)
{
//初始化
LayerInit();
}
current.transform.parent = mLayerDic[type].transform;
UIPanel[] panels = current.GetComponentsInChildren<UIPanel>(true);
foreach(UIPanel panel in panels)
{
panel.depth += (int)type;
}
}

public void LayerInit()
{
mParent = GameObject.Find("UI Root").transform;
int nums = Enum.GetNames(typeof(LayerType)).Length;
for (int i = 0; i < nums; i++)
{
object obj = Enum.GetValues(typeof(LayerType)).GetValue(i);
mLayerDic.Add((LayerType)obj, CreateLayerGameObject(obj.ToString(), (LayerType)obj));
}
}
GameObject CreateLayerGameObject(string name,LayerType type)
{
GameObject layer = new GameObject(name);
layer.transform.parent = mParent;
layer.transform.localEulerAngles = Vector3.zero;
layer.transform.localScale = Vector3.one;
layer.transform.localPosition = new Vector3(0, 0, ((int)type) * -1);
return layer;
}
}

public enum LayerType
{
/// <summary> 场景 </summary>
Scene = 50,
/// <summary> 面板 </summary>
Panel = 200,
/// <summary> 提示 </summary>
Tips = 400,
/// <summary> 公告跑马灯 </summary>
Notice = 1000,
}