动态修改UGUI渲染顺序

//雨松大神的方法

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

public class UIDepth : MonoBehaviour {

    public int order;
    public bool isUI = true;
	// Use this for initialization
	void Start () {
        if (isUI)
        {
            Canvas canvas = GetComponent<Canvas>();
            if (canvas == null)
            {
                canvas = gameObject.AddComponent<Canvas>();
            }
            canvas.overrideSorting = true;
            canvas.sortingOrder = order;
        }
        else
        {
            Renderer[] renders = GetComponentsInChildren<Renderer>();
            foreach (Renderer render in renders)
            {
                render.sortingOrder = order;
            }
        }
	}
	
}