Unity3D异步加载游戏场景

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour
{
    public UISlider slider;
    AsyncOperation async;
    bool flag = false;

    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (flag)
        {
            slider.value = async.progress;
        }
    }

    void OnClick()
    {
        StartCoroutine(LoadScene());
    }

    IEnumerator LoadScene()
    {
        async = Application.LoadLevelAsync("Scene");
        yield return async;
        flag = true;
    }
}

加载场景但不激活

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour
{
    public UISlider progressSlider;
    bool flag = false;
    AsyncOperation async;
    // Use this for initialization
    void Start()
    {
        StartCoroutine(LoadScene());
    }

    // Update is called once per frame
    void Update()
    {
        if (flag && progressSlider.value!=1)
        {
            progressSlider.value = async.progress;
        }
    }


    void OnClick()
    {
        async.allowSceneActivation = true;
    }

    IEnumerator LoadScene()
    {
        async = Application.LoadLevelAsync("Scene");
        async.allowSceneActivation = false;
        flag = true;
        yield return async;
    }
}

此处有个bug，或许是我做的不对，async.progress最大只能到9。

http://forum.unity3d.com/threads/using-allowsceneactivation.166106/

导出webplayer版发现进入第一个场景后，第二个场景没有预加载，原因是勾选了Streamed。