unity 异步加载进度条

一个超好用的游戏加载进度条脚本，调用简单

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

public class LoadSceneHandler : MonoBehaviour {

    public Slider processView;
    void Start () {
        StartLoadGame();
    }

    public void StartLoadGame()
    {
        StartCoroutine(StartLoading("targetScene"));
    }
    
    public IEnumerator StartLoading(string sceneName)
    {
        int displayProgress = 0;
        int toProgress = 0;
        AsyncOperation op = SceneManager.LoadSceneAsync(sceneName);
        op.allowSceneActivation = false;
        
        while (op.progress<0.9)
        {
            toProgress = (int)op.progress * 100;
            while (displayProgress<toProgress)
            {
                displayProgress++;
                SetLoadingPercentage(displayProgress);
                yield return new WaitForEndOfFrame(); 
            }
        }
        toProgress = 100;
        while (displayProgress < toProgress)
        {
            displayProgress++;
            SetLoadingPercentage(displayProgress);
            yield return new WaitForEndOfFrame();
        }
        op.allowSceneActivation = true;
    }

    public void SetLoadingPercentage(float v)
    {
        processView.value = v/100;
    }

}