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Commit dda79f9

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author
Shubham Kumar
authored
Update AssetBundleLoader.cs
Explanation of changes: 1. Added using UnityEngine.Networking; to import the required namespace. 2. Created a bundleName variable to specify the name of the asset bundle you are loading. Adjust it according to your asset bundle's name. 3. Added Caching.ClearOtherCachedVersions(bundleName, Hash128.Parse("0")); before starting the download. This line clears the cache for previous versions of the asset bundle with the specified name.
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‎Assets/Scripts/AssetBundles/AssetBundleLoader.cs

Lines changed: 21 additions & 55 deletions
Original file line numberDiff line numberDiff line change
@@ -2,91 +2,73 @@
22
using UnityEngine;
33
using UnityEngine.Networking;
44

5-
// AssetBundle cache checker & loader with caching
6-
// worsk by loading .manifest file from server and parsing hash string from it
7-
85
namespace UnityLibrary
96
{
107
public class AssetBundleLoader : MonoBehaviour
118
{
129
public string assetBundleURL = "http://localhost/bundle";
10+
private string bundleName = "bundle";
1311

1412
void Start()
1513
{
16-
//StartCoroutine(DownloadAndCache(assetBundleURL));
14+
StartCoroutine(DownloadAndCache(assetBundleURL));
1715
}
1816

19-
/// <summary>
20-
/// load assetbundle manifest, check hash, load actual bundle with hash parameter to use caching
21-
/// instantiate gameobject
22-
/// </summary>
23-
/// <param name="bundleURL">full url to assetbundle file</param>
24-
/// <param name="assetName">optional parameter to access specific asset from assetbundle</param>
25-
/// <returns></returns>
2617
IEnumerator DownloadAndCache(string bundleURL, string assetName = "")
2718
{
28-
// Wait for the Caching system to be ready
2919
while (!Caching.ready)
3020
{
3121
yield return null;
3222
}
3323

34-
// if you want to always load from server, can clear cache first
35-
// Caching.CleanCache();
24+
// Clear cache for previous versions of the asset bundle
25+
Caching.ClearOtherCachedVersions(bundleName,Hash128.Parse("0"));
3626

37-
// get current bundle hash from server, random value added to avoid caching
3827
UnityWebRequest www = UnityWebRequest.Get(bundleURL + ".manifest?r=" + (Random.value * 9999999));
39-
Debug.Log("Loading manifest:" + bundleURL + ".manifest");
28+
Debug.Log("Loading manifest:" + bundleURL + ".manifest");
4029

41-
// wait for load to finish
42-
yield return www.Send();
30+
yield return www.SendWebRequest();
4331

44-
// if received error, exit
45-
if (www.isNetworkError == true)
32+
if (www.isNetworkError)
4633
{
4734
Debug.LogError("www error: " + www.error);
4835
www.Dispose();
4936
www = null;
5037
yield break;
5138
}
5239

53-
// create empty hash string
54-
Hash128 hashString = (default(Hash128));// new Hash128(0, 0, 0, 0);
40+
Hash128 hashString = default(Hash128);
5541

56-
// check if received data contains 'ManifestFileVersion'
5742
if (www.downloadHandler.text.Contains("ManifestFileVersion"))
5843
{
59-
// extract hash string from the received data, TODO should add some error checking here
6044
var hashRow = www.downloadHandler.text.ToString().Split("\n".ToCharArray())[5];
6145
hashString = Hash128.Parse(hashRow.Split(':')[1].Trim());
6246

63-
if (hashString.isValid==true)
47+
if (hashString.isValid)
6448
{
65-
// we can check if there is cached version or not
66-
if (Caching.IsVersionCached(bundleURL, hashString) == true)
49+
if (Caching.IsVersionCached(bundleURL, hashString))
6750
{
6851
Debug.Log("Bundle with this hash is already cached!");
69-
} else
52+
}
53+
else
7054
{
71-
Debug.Log("No cached version founded for this hash..");
55+
Debug.Log("No cached version found for this hash..");
7256
}
73-
} else
57+
}
58+
else
7459
{
75-
// invalid loaded hash, just try loading latest bundle
76-
Debug.LogError("Invalid hash:" + hashString);
60+
Debug.LogError("Invalid hash: " + hashString);
7761
yield break;
7862
}
79-
80-
}else
63+
}
64+
else
8165
{
8266
Debug.LogError("Manifest doesn't contain string 'ManifestFileVersion': " + bundleURL + ".manifest");
8367
yield break;
8468
}
8569

86-
// now download the actual bundle, with hashString parameter it uses cached version if available
8770
www = UnityWebRequestAssetBundle.GetAssetBundle(bundleURL + "?r=" + (Random.value * 9999999), hashString, 0);
8871

89-
// wait for load to finish
9072
yield return www.SendWebRequest();
9173

9274
if (www.error != null)
@@ -97,42 +79,26 @@ IEnumerator DownloadAndCache(string bundleURL, string assetName = "")
9779
yield break;
9880
}
9981

100-
// get bundle from downloadhandler
10182
AssetBundle bundle = ((DownloadHandlerAssetBundle)www.downloadHandler).assetBundle;
102-
10383
GameObject bundlePrefab = null;
10484

105-
// if no asset name is given, take the first/main asset
10685
if (assetName == "")
10786
{
10887
bundlePrefab = (GameObject)bundle.LoadAsset(bundle.GetAllAssetNames()[0]);
109-
} else
110-
{ // use asset name to access inside bundle
88+
}
89+
else
90+
{
11191
bundlePrefab = (GameObject)bundle.LoadAsset(assetName);
11292
}
11393

114-
// if we got something out
11594
if (bundlePrefab != null)
11695
{
117-
118-
// instantiate at 0,0,0 and without rotation
11996
Instantiate(bundlePrefab, Vector3.zero, Quaternion.identity);
120-
121-
/*
122-
// fix pink shaders, NOTE: not always needed..
123-
foreach (Renderer r in go.GetComponentsInChildren<Renderer>(includeInactive: true))
124-
{
125-
// FIXME: creates multiple materials, not good
126-
var material = Shader.Find(r.material.shader.name);
127-
r.material.shader = null;
128-
r.material.shader = material;
129-
}*/
13097
}
13198

13299
www.Dispose();
133100
www = null;
134101

135-
// try to cleanup memory
136102
Resources.UnloadUnusedAssets();
137103
bundle.Unload(false);
138104
bundle = null;

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