异步加载场景主要用于加载时的等待界面。

创建3个场景A、B、C。B场景为等待界面。

A场景代码，绑在摄像机上就好。

using UnityEngine;
using System.Collections;

public class A : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	void OnGUI()
	{
		if(GUILayout.Button("Click",GUILayout.Height(50)))
		{
			Globe.SceneName = "C";
			Application.LoadLevel("B");
		}
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}

B场景代码绑在摄像机上。

using UnityEngine;
using System.Collections;

public class B : MonoBehaviour {
	
	
	AsyncOperation async;
	
	// Use this for initialization
	void Start ()
	{
		StartCoroutine(loadScene());
	}
	
	IEnumerator loadScene()
	{
		async = Application.LoadLevelAsync(Globe.SceneName);
		yield return async;
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}

C场景代码同样绑在摄像机上。这里我们创建很多物体，模拟创建数据的创建。

using UnityEngine;
using System.Collections;

public class C : MonoBehaviour 
{

	public GameObject prefab;
	
	// Use this for initialization
	void Start () 
	{
		loadObject();
	}
	
	void loadObject()
	{
		for(int i =0;i < 10000;i++)
		{
			Instantiate(prefab);
			
		}
	
	}
	
	
	
	// Update is called once per frame
	void Update () {
	
	}
}