[Unity热更新]03.加载方式

参考链接&＃xff1a;

https://blog.csdn.net/qq_40338728/article/details/87880870

https://docs.unity3d.com/Manual/AssetBundles-Building.html

https://docs.unity3d.com/Manual/AssetBundles-Native.html

1.BuildAssetBundleOptions

三种压缩方式&＃xff1a;

a.None

使用LZMA算法压缩&＃xff0c;打出的包体积最小&＃xff0c;加载时间最长。使用这种方式压缩的包&＃xff0c;在使用前需要整个包解压&＃xff0c;从而导致加载时间变长。当整个包解压后&＃xff0c;会使用LZ4算法再次压缩

b.UncompressedAssetBundle

不压缩&＃xff0c;打出的包体积最大&＃xff0c;加载时间最短

c.ChunkBasedCompression

使用LZ4算法压缩&＃xff0c;打出的包体积中等&＃xff0c;加载时间中等(即介于None和UncompressedAssetBundle之间)。使用这种方式压缩的包&＃xff0c;在使用前不需要整个包解压&＃xff0c;即要用哪个资源才解压哪个&＃xff0c;局部解压

测试(这里只测试了包体积&＃xff0c;因为测试的包比较小加载时间差别不大就不贴出来了)&＃xff1a;

None&＃xff1a;

UncompressedAssetBundle&＃xff1a;

ChunkBasedCompression&＃xff1a;

2.加载AB包的方式(同步 or 异步)

a.AssetBundle.LoadFromMemoryAsync

1 using System.Collections;
2 using System.IO;
3 using UnityEngine;
4
5 public class TestAB : MonoBehaviour
6 {
7 void Start()
8 {
9 StartCoroutine(Load());
10 }
11
12 IEnumerator Load()
13 {
14 AssetBundleCreateRequest request &＃61; AssetBundle.LoadFromMemoryAsync(File.ReadAllBytes("Assets/AB/cube"));
15 yield return request;
16 AssetBundle cubeAB &＃61; request.assetBundle;
17 if (cubeAB !&＃61; null)
18 {
19 GameObject go &＃61; Instantiate(cubeAB.LoadAsset("cube"));
20 go.transform.localScale &＃61; Vector3.one * 2;
21 }
22 }
23 }

b.AssetBundle.LoadFromFile

1 using UnityEngine;
2
3 public class TestAB : MonoBehaviour
4 {
5 void Start()
6 {
7 AssetBundle cubeAB &＃61; AssetBundle.LoadFromFile("Assets/AB/cube");
8 if (cubeAB !&＃61; null)
9 {
10 GameObject go &＃61; Instantiate(cubeAB.LoadAsset("cube"));
11 go.transform.localScale &＃61; Vector3.one * 2;
12 }
13 }
14 }

c.WWW.LoadFromCacheOrDownload(废弃接口&＃xff0c;新接口UnityWebRequest)

1 using System.Collections;
2 using System.IO;
3 using UnityEngine;
4
5 public class TestAB : MonoBehaviour
6 {
7 void Start()
8 {
9 StartCoroutine(Load());
10 }
11
12 IEnumerator Load()
13 {
14 string path &＃61; Application.dataPath &＃43; "/AB/cube";
15 Debug.Log(path);
16 WWW www &＃61; WWW.LoadFromCacheOrDownload(path, 1);
17 yield return www;
18 AssetBundle cubeAB &＃61; www.assetBundle;
19 if (www.error !&＃61; null)
20 {
21 Debug.Log(www.error);
22 }
23 if (cubeAB !&＃61; null)
24 {
25 GameObject go &＃61; Instantiate(cubeAB.LoadAsset("cube"));
26 go.transform.localScale &＃61; Vector3.one * 2;
27 }
28 }
29 }

d.UnityWebRequest

1 using System.Collections;
2 using UnityEngine;
3 using UnityEngine.Networking;
4
5 public class TestAB : MonoBehaviour
6 {
7 void Start()
8 {
9 StartCoroutine(Load());
10 }
11
12 IEnumerator Load()
13 {
14 string path &＃61; "file:///" &＃43; Application.dataPath &＃43; "/AB/cube";
15 Debug.Log(path);
16 UnityWebRequest request &＃61; UnityWebRequestAssetBundle.GetAssetBundle(path);
17 yield return request.SendWebRequest();
18 AssetBundle cubeAB &＃61; DownloadHandlerAssetBundle.GetContent(request);
19 if (cubeAB !&＃61; null)
20 {
21 GameObject go &＃61; Instantiate(cubeAB.LoadAsset("cube"));
22 go.transform.localScale &＃61; Vector3.one * 2;
23 }
24 }
25 }