Unity 异步加载场景

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class loadingAsync : MonoBehaviour {
    private AsyncOperation m_Ao;
    public string loadSceneName;
    private bool isLoading;
    public Text processText;
	// Use this for initialization
	void Start ()
    {
	
}

// Update is called once per frame
void Update ()
{
	
}
private void loading()
{
    StartCoroutine("loadScene");
}
IEnumerator loadScene()
{
    int startProcess = 0;
    int endProcess = 100;
    while (startProcess < endProcess)
    {
        startProcess++;
        showProcess(startProcess);         
        if (isLoading == false)
        {
            m_Ao = SceneManager.LoadSceneAsync(loadSceneName);
            
            m_Ao.allowSceneActivation = false;
            
            isLoading = true;
        }
        yield return new WaitForEndOfFrame();
    }
    if (startProcess == 100)
    {
        StopCoroutine("loadScene");//停止协程  应该用字符串,这样才能真正的停止协程，那么开启协程也应该用字符串
        m_Ao.allowSceneActivation = true;
    }
}
private void showProcess(int process)
{
    processText.text = process.ToString() + "%";
}

}