[游戏开发]unity资源(场景)初始化加载进度~

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

public class LoadABFiles : MonoBehaviour
{
    private Slider slider;
    public Text textName;
    public Text textProgress;

    bool isProgressing = false;
    UnityWebRequest pro;
    int abID = 0;

    string filepath;
    string[] dirs;

    private void Awake()
    {
        //当前文件同级目录，和Assets或exe同级
        filepath = System.Environment.CurrentDirectory + "/panoramaABs/";
        //panoramaABs文件夹所有子文件夹
        dirs = System.IO.Directory.GetFileSystemEntries(filepath);
    }

    private void Start()
    {
        slider = transform.Find("Slider").GetComponent<Slider>();
        StartCoroutine(LoadingAssetBundle());
        StartCoroutine(ChangeText());
        StartCoroutine(UpdateProgress());
    }

    private IEnumerator LoadingAssetBundle()
    {
        for (int i = 0; i < MainManager.instance.bundles.Count; i++)
        {
            if (i < dirs.Length)
            {
                string parh = filepath + i + "/" + i + ".unity3d";

                using (UnityWebRequest uwr = UnityWebRequestAssetBundle.GetAssetBundle(parh))
                {
                    isProgressing = true;
                    pro = uwr;
                    abID = i;
                    yield return uwr.SendWebRequest();
                    if (!uwr.isHttpError)
                    {
                        // MainManager中的:public List<AssetBundle> bundles = new List<AssetBundle>();
                        MainManager.instance.bundles[i] = DownloadHandlerAssetBundle.GetContent(uwr);
                        isProgressing = false;
                    }
                    yield return new WaitForFixedUpdate();
                }
            }
        }
        yield return new WaitForSeconds(0.1f);
        Debug.Log("资源加载完毕");
        //MainManager.instance.LoadMainCanvas();
        //Destroy(gameObject);
    }

    #region //当前包加载进度条
    IEnumerator UpdateProgress()
    {
        while (true)
        {
            if (isProgressing)
            {
                if (pro.downloadProgress < 0) yield break;
            }
            textProgress.text = ((int)(GetProgress * 10000)) / 100f + "%";
            slider.value = (((int)(GetProgress * 10000)) / 10000f);
            yield return 0;
        }
    }

    public float GetProgress
    {
        get
        {
            if (isProgressing)
                return pro.downloadProgress;
            else
                return 1;
        }
    }
    #endregion

    #region 开启文本动画
    int textAnim = 0;
    IEnumerator ChangeText()
    {
        while (true)
        {
            if (textAnim == 0 && dirs.Length > 0)
            {
                textName.text = "资源[" + (abID + 1) + "/" + dirs.Length + "]加载中";
                yield return new WaitForSeconds(0.2f);
                textName.text = "资源[" + (abID + 1) + "/" + dirs.Length + "]加载中.";
                yield return new WaitForSeconds(0.2f);
                textName.text = "资源[" + (abID + 1) + "/" + dirs.Length + "]加载中..";
                yield return new WaitForSeconds(0.2f);
                textName.text = "资源[" + (abID + 1) + "/" + dirs.Length + "]加载中...";
                yield return new WaitForSeconds(0.2f);
            }
            //if (textAnim == 1)
            //{
            //    textName.text = "资源[" + abID + "]加载中";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源[" + abID + "]加载中.";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源[" + abID + "]加载中..";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源[" + abID + "]加载中...";
            //    yield return new WaitForSeconds(0.2f);
            //}
            //if (textAnim == 2)
            //{
            //    textName.text = "资源加载中";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源加载中.";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源加载中..";
            //    yield return new WaitForSeconds(0.2f);
            //    textName.text = "资源加载中...";
            //    yield return new WaitForSeconds(0.2f);
            //}
        }
    }
    #endregion
/*
    #region 异步加载场景进度条

    int sliderValue; //当前进度
    //int objValue;  //目标进度
    private IEnumerator LoadingScene()
    {
        AsyncOperation ao = SceneManager.LoadSceneAsync("???");
        ao.allowSceneActivation = false;
        while (ao.progress < 0.9f) 
        {
            //objValue = (int)(ao.progress * 100);
            yield return LoadProgress();
        }
        //objValue = 100;
        yield return LoadProgress();
        ao.allowSceneActivation = true;
    }

    private IEnumerator<WaitForEndOfFrame> LoadProgress()
    {
        //while (sliderValue < objValue)
        while (sliderValue < 100)
        {
            ++sliderValue;
            slider.value = (float)sliderValue / 100;
            yield return new WaitForEndOfFrame();
        }
    }
    #endregion
    */
}