using UnityEngine;

using System.Collections;

using UnityEngine.SceneManagement;

using System;

public class LoadingPage : MonoBehaviour {

    public UISlider progressBar;

    // 目标进度

    float target = ;

    // 读取场景的进度，取值范围0~1

    float progress = ;

    // 异步对象

    AsyncOperation op = null;

    void Start () {

        Debug.Log("开始LoadScene");

        op = SceneManager.LoadSceneAsync("GamePlayScene");

        op.allowSceneActivation = false;

        progressBar.value = ;

        // 开启协程，开始调用加载方法

        StartCoroutine(processLoading());

    }

    float dtimer = ;

    void Update()

    {

        progressBar.value = Mathf.Lerp(progressBar.value, target, dtimer * 0.02f);

        dtimer += Time.deltaTime;

        if (progressBar.value > 0.99f)

        {

            progressBar.value = ;

            op.allowSceneActivation = true;

        }

    }

    // 加载进度

    IEnumerator processLoading()

    {

        while (true)

        {

            target = op.progress; // 进度条取值范围0~1

            if (target >= 0.9f)

            {

                target = ;

                yield break;

            }

            yield return ;

        }

    }

}