WWW緩存方式

緩存方式

使用WWW.LoadFromCacheOrDownload接口。AssetBundles將保存在本地設備的Unity的緩存文件夾中。WebPlayer 有50MB的緩存上限，PC/Mac/Android/IOS應有有4 GB的緩存上限。這種方式也是加載AssetBundle推薦的方式。我們使用這種方式來實踐一下。在Scripts文件夾中新建腳本：

 

using System;
using UnityEngine;
using System.Collections;

public class CacheBundle : MonoBehaviour
{
	public static readonly string BundleURL =
#if UNITY_ANDROID
		"jar:file://" + Application.dataPath + "!/assets/MyAssetBundles/shape/cube";
#elif UNITY_IPHONE
		Application.dataPath + "/Raw/MyAssetBundles/shape/cube";
#elif UNITY_STANDALONE_WIN || UNITY_EDITOR
		//我們將加載以前打包好的cube
 "file://" + Application.dataPath + "/MyAssetBundles/shape/cube";//由於是編輯器下，我們使用這個路徑。
#else
        string.Empty;
#endif

	//還記得嗎？在cube這個AssetBundle中有兩個資源，Cube1和Cube2
	private string AssetName = "Cube2";

	//版本號
	public int version;

	void Start()
	{
		StartCoroutine(DownloadAndCache());
	}

	IEnumerator DownloadAndCache()
	{
		// 需要等待緩存准備好
		while (!Caching.ready)
			yield return null;

		// 有相同版本號的AssetBundle就從緩存中獲取，否則下載進緩存。
		using (WWW www = WWW.LoadFromCacheOrDownload(BundleURL, version))
		{
			yield return www;
			if (www.error != null)
				throw new Exception("WWW download had an error:" + www.error);
			AssetBundle bundle = www.assetBundle;
			GameObject cube = Instantiate(bundle.LoadAsset(AssetName)) as GameObject;
			cube.transform.position = new Vector3(1.5f, 0f, 0f);
			// 卸載加載完之后的AssetBundle，節省內存。
			bundle.Unload(false);

		} //由於使用using語法，www.Dispose將在加載完成后調用，釋放內存
	}
}

　　

博主注：版本號可按天來，比如

int version;

version = DateTime.dayOfYears;

 

 

http://baizihan.me/2016/03/unity-assetbundle03/