using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.SceneManagement;

public class LoadingPags : MonoBehaviour

{

    public UISlider progressBar;            //进度条的引用

    private string ScenceName="C";       //加载场景的名字

    private  float dtimer = ;

    private  float target = ;

    AsyncOperation op = null;

    private void Start()

    {

        Debug.Log("进入异步");

        //op = SceneManager.LoadSceneAsync(ScenceName);          //进入loadScene方法

        //op.allowSceneActivation = false;

        progressBar.value = ;                                      //弃用前将其进行初始化了

        StartCoroutine(ProcessLoading());

    }

    private void Update()

    {

        dtimer += Time.deltaTime;

        progressBar.value = Mathf.Lerp(progressBar.value, target, dtimer * 0.2f);

        //乘以的数值用来控制加载的速度，当新场景比较小的时候可以使用较小的值，有一定的效果，当场景加载较大的时候就不建议这么使用了

        if(progressBar.value>=0.99f)

        {

            progressBar.value = ;                          //使其的值达到完整

            op.allowSceneActivation = true;             //为true 的时候才可以进行加载新的场景

        }

    }

    IEnumerator ProcessLoading()

    {

        op = SceneManager.LoadSceneAsync(ScenceName);          //进入loadScene方法

        op.allowSceneActivation = false;

        while (true)                        //死循环，使其在场景没有加载完成时就不退出了

        {

            target = op.progress;

            if(target>=0.9f)                //当场景加载了90%了

            {

                target = ;

                yield break;

            }

            yield return ;

        }

    }

}

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.SceneManagement;

public class Loadign : MonoBehaviour {

    public UISlider uislider;

    private AsyncOperation asyn=null;

    public static string LoadingName;           //声明一个静态的字符串变量俩保存要加载的场景名称

    void Start ()

    {

        if(uislider)

        {

            //进度条丢失了

        }

        StartCoroutine(Loading());

    }

    // Update is called once per frame

    void Update ()

    {

        uislider.value = asyn.progress;

        //Debug.Log(uislider.value);

        //if (uislider.value>=0.8)

        //{

        //    uislider.value = 1;

        //    asyn.allowSceneActivation = true;

        //}

    }

    IEnumerator Loading()

    {

        asyn = SceneManager.LoadSceneAsync();          //加载第三个尝尽

        asyn.allowSceneActivation = false;

        //uislider.value = asyn.progress;         //赋值

        yield return asyn;

    }

    //封装好的静态函数

    public static void LoadNewScene(string value)

    {

        LoadingName = value;

        SceneManager.LoadScene("Loadign");

    }

}