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[Unity热更新]动态加载_instantiate和resources.load

作者：Gausst松鼠会 | 2024-05-14 00:02:50

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instantiate和resources.load

参考链接：

http://www.xuanyusong.com/archives/1919


对于动态加载，主要有两种方式：

1.使用Resources.Load

2.使用AssetBundle


在游戏中，有一个很常见的情况：

有多个场景，且一开始时场景中角色和摄像机的位置旋转是不同的。如果我们把角色都放在场景，然后打包，明显是不对的(会增加apk的体积)，所以需要把角色和场景分开，放在不同的包中。这时就需要根据配置信息来放置角色和摄像机的位置了。


生成配置文件：

  1. using UnityEngine;
  2. using System.Collections;
  3. using UnityEditor;
  4. using System.Collections.Generic;
  5. using System.Xml;
  6. using System.IO;
  7. using System.Text;
  8. using LitJson;
  9.  
  10. public class ExportScene : Editor {
  11.  
  12. 	//将所有游戏场景导出为XML格式
  13. 	[MenuItem ("Tool/ExportXML")]
  14. 	static void ExportXML ()
  15. 	{
  16. 		string filepath = Application.dataPath + @"/StreamingAssets/sceneInfoXML.xml";
  17. 		if(File.Exists (filepath))
  18. 		{
  19. 			File.Delete(filepath);
  20. 		}
  21. 		XmlDocument xmlDoc = new XmlDocument();
  22. 		XmlElement root = xmlDoc.CreateElement("scenes");
  23. 		//遍历所有的游戏场景
  24. 		foreach (UnityEditor.EditorBuildSettingsScene s in UnityEditor.EditorBuildSettings.scenes)
  25. 		{
  26. 			//当关卡启用
  27. 			if (s.enabled)
  28. 			{
  29. 				//得到关卡的名称
  30. 				string name = s.path;
  31. 				//打开这个关卡
  32. 				EditorApplication.OpenScene(name);
  33. 				XmlElement scene = xmlDoc.CreateElement("scene");
  34. 				scene.SetAttribute("name",name);
  35. 				foreach (GameObject obj in Object.FindObjectsOfType(typeof(GameObject)))
  36. 				{
  37. 					//因为场景内物体都制作为prefab，所以只需遍历父物体而无需遍历子物体(prefab已包含子物体的信息)
  38. 					if (obj.transform.parent == null)
  39. 					{
  40. 						XmlElement gameObject = xmlDoc.CreateElement("gameObject");
  41. 						gameObject.SetAttribute("name",obj.name);				
  42. 						gameObject.SetAttribute("asset",obj.name + ".prefab");
  43. 						XmlElement transform = xmlDoc.CreateElement("transform");
  44.  
  45. 						XmlElement position = xmlDoc.CreateElement("position");
  46. 						XmlElement position_x = xmlDoc.CreateElement("x");
  47. 						position_x.InnerText = obj.transform.position.x+"";
  48. 						XmlElement position_y = xmlDoc.CreateElement("y");
  49. 						position_y.InnerText = obj.transform.position.y+"";
  50. 						XmlElement position_z = xmlDoc.CreateElement("z");
  51. 						position_z.InnerText = obj.transform.position.z+"";
  52. 						position.AppendChild(position_x);
  53. 						position.AppendChild(position_y);
  54. 						position.AppendChild(position_z);
  55. 						
  56. 						XmlElement rotation = xmlDoc.CreateElement("rotation");
  57. 						XmlElement rotation_x = xmlDoc.CreateElement("x");
  58. 						rotation_x.InnerText = obj.transform.rotation.eulerAngles.x+"";
  59. 						XmlElement rotation_y = xmlDoc.CreateElement("y");
  60. 						rotation_y.InnerText = obj.transform.rotation.eulerAngles.y+"";
  61. 						XmlElement rotation_z = xmlDoc.CreateElement("z");
  62. 						rotation_z.InnerText = obj.transform.rotation.eulerAngles.z+"";
  63. 						rotation.AppendChild(rotation_x);
  64. 						rotation.AppendChild(rotation_y);
  65. 						rotation.AppendChild(rotation_z);
  66. 						
  67. 						XmlElement scale = xmlDoc.CreateElement("scale");
  68. 						XmlElement scale_x = xmlDoc.CreateElement("x");
  69. 						scale_x.InnerText = obj.transform.localScale.x+"";
  70. 						XmlElement scale_y = xmlDoc.CreateElement("y");
  71. 						scale_y.InnerText = obj.transform.localScale.y+"";
  72. 						XmlElement scale_z = xmlDoc.CreateElement("z");
  73. 						scale_z.InnerText = obj.transform.localScale.z+"";			
  74. 						scale.AppendChild(scale_x);
  75. 						scale.AppendChild(scale_y);
  76. 						scale.AppendChild(scale_z);
  77. 						
  78. 						transform.AppendChild(position);
  79. 						transform.AppendChild(rotation);
  80. 						transform.AppendChild(scale);	
  81. 						
  82. 						gameObject.AppendChild(transform);
  83. 						scene.AppendChild(gameObject);
  84. 						root.AppendChild(scene);
  85. 						xmlDoc.AppendChild(root);
  86. 						xmlDoc.Save(filepath);				
  87. 					}
  88. 				}
  89. 			}
  90. 		}
  91. 		//刷新Project视图， 不然需要手动刷新哦
  92. 		AssetDatabase.Refresh();
  93. 	}
  94. 	
  95. 	//将所有游戏场景导出为JSON格式
  96. 	[MenuItem ("Tool/ExportJSON")]
  97. 	static void ExportJSON ()
  98. 	{
  99. 		string filepath = Application.dataPath + @"/StreamingAssets/sceneInfoJSON.txt";
  100. 		FileInfo t = new FileInfo(filepath);
  101. 		if(File.Exists (filepath))
  102. 		{
  103. 			File.Delete(filepath);
  104. 		}
  105. 		StreamWriter sw = t.CreateText();
  106. 		
  107. 		StringBuilder sb = new StringBuilder ();
  108. 		JsonWriter writer = new JsonWriter (sb);
  109. 		writer.WriteObjectStart ();
  110. 		writer.WritePropertyName ("scenes");
  111. 		writer.WriteArrayStart ();
  112. 		
  113. 		foreach (UnityEditor.EditorBuildSettingsScene s in UnityEditor.EditorBuildSettings.scenes)
  114. 		{
  115. 			if (s.enabled)
  116. 			{
  117. 				string name = s.path;
  118. 				EditorApplication.OpenScene(name);
  119. 				writer.WriteObjectStart();
  120. 				writer.WritePropertyName("scene");
  121. 				writer.WriteObjectStart();
  122. 				writer.WritePropertyName("name");
  123. 				writer.Write(name);
  124. 				writer.WritePropertyName("gameObjects");
  125. 				writer.WriteArrayStart ();
  126. 				
  127. 				foreach (GameObject obj in Object.FindObjectsOfType(typeof(GameObject)))
  128. 				{
  129. 					if (obj.transform.parent == null)
  130. 					{
  131. 						writer.WriteObjectStart();
  132. 						writer.WritePropertyName("name");
  133. 						writer.Write(obj.name);
  134. 						
  135. 						writer.WritePropertyName("position");
  136. 						writer.WriteArrayStart ();
  137. 						writer.WriteObjectStart();
  138. 						writer.WritePropertyName("x");
  139. 						writer.Write(obj.transform.position.x.ToString("F5"));
  140. 						writer.WritePropertyName("y");
  141. 						writer.Write(obj.transform.position.y.ToString("F5"));
  142. 						writer.WritePropertyName("z");
  143. 						writer.Write(obj.transform.position.z.ToString("F5"));
  144. 						writer.WriteObjectEnd();
  145. 						writer.WriteArrayEnd();
  146. 						
  147. 						writer.WritePropertyName("rotation");
  148. 						writer.WriteArrayStart ();
  149. 						writer.WriteObjectStart();
  150. 						writer.WritePropertyName("x");
  151. 						writer.Write(obj.transform.rotation.eulerAngles.x.ToString("F5"));
  152. 						writer.WritePropertyName("y");
  153. 						writer.Write(obj.transform.rotation.eulerAngles.y.ToString("F5"));
  154. 						writer.WritePropertyName("z");
  155. 						writer.Write(obj.transform.rotation.eulerAngles.z.ToString("F5"));
  156. 						writer.WriteObjectEnd();
  157. 						writer.WriteArrayEnd();
  158. 						
  159. 						writer.WritePropertyName("scale");
  160. 						writer.WriteArrayStart ();
  161. 						writer.WriteObjectStart();
  162. 						writer.WritePropertyName("x");
  163. 						writer.Write(obj.transform.localScale.x.ToString("F5"));
  164. 						writer.WritePropertyName("y");
  165. 						writer.Write(obj.transform.localScale.y.ToString("F5"));
  166. 						writer.WritePropertyName("z");
  167. 						writer.Write(obj.transform.localScale.z.ToString("F5"));
  168. 						writer.WriteObjectEnd();
  169. 						writer.WriteArrayEnd();
  170. 						
  171. 						writer.WriteObjectEnd();
  172. 					}
  173. 				}
  174. 				
  175. 				writer.WriteArrayEnd();//end gameObjects
  176. 				writer.WriteObjectEnd();//end name
  177. 				writer.WriteObjectEnd();//end scene
  178. 			}
  179. 		}
  180. 		writer.WriteArrayEnd();//end scenes
  181. 		writer.WriteObjectEnd ();//end root
  182. 		
  183. 		sw.WriteLine(sb.ToString());
  184. 		sw.Close();
  185. 		sw.Dispose();
  186. 		AssetDatabase.Refresh();
  187. 	}
  188.  
  189. 	//将所有游戏场景导出为Binary格式
  190. 	[MenuItem ("Tool/ExportBinary")]
  191. 	static void ExportBinary ()
  192. 	{
  193. 		string filepath = Application.dataPath + @"/StreamingAssets/sceneInfoBinary.txt";
  194. 		if(File.Exists (filepath))
  195. 		{
  196. 			File.Delete(filepath);
  197. 		}
  198. 		FileStream fs = new FileStream(filepath, FileMode.Create);
  199. 		BinaryWriter bw = new BinaryWriter(fs);
  200. 		foreach (UnityEditor.EditorBuildSettingsScene s in UnityEditor.EditorBuildSettings.scenes)
  201. 		{
  202. 			if (s.enabled)
  203. 			{
  204. 				string sceneName = s.path;
  205. 				EditorApplication.OpenScene(sceneName);
  206. 				bw.Write(sceneName);
  207.  
  208. 				foreach (GameObject obj in Object.FindObjectsOfType(typeof(GameObject)))
  209. 				{
  210. 					if (obj.transform.parent == null)
  211. 					{
  212. 						bw.Write(obj.name);
  213. 						//将float转化为short，这样传输的字节数就会变少
  214. 						//接收时将short转化为float就可以了
  215. 						bw.Write((short)(obj.transform.position.x * 100));
  216. 						bw.Write((short)(obj.transform.position.y * 100));
  217. 						bw.Write((short)(obj.transform.position.z * 100));
  218. 						bw.Write((short)(obj.transform.rotation.eulerAngles.x * 100));
  219. 						bw.Write((short)(obj.transform.rotation.eulerAngles.y * 100));
  220. 						bw.Write((short)(obj.transform.rotation.eulerAngles.z * 100));
  221. 						bw.Write((short)(obj.transform.localScale.x * 100));
  222. 						bw.Write((short)(obj.transform.localScale.y * 100));
  223. 						bw.Write((short)(obj.transform.localScale.z * 100));		
  224. 					}
  225. 				}
  226. 			}
  227. 		}
  228. 		
  229. 		bw.Flush();
  230. 		bw.Close();
  231. 		fs.Close();
  232. 		AssetDatabase.Refresh();
  233. 	}
  234. }

读取配置文件： 

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.Xml;
  4. using System.IO;
  5.  
  6. //建立一个空物体，然后挂上此脚本
  7. public class ResolveSceneInfoXML : MonoBehaviour {
  8.  
  9. 	// Use this for initialization
  10. 	void Start () 
  11. 	{
  12. 		//电脑和iphone上的路径是不一样的，这里用标签判断一下。
  13. 		#if UNITY_EDITOR
  14. 		string filepath = Application.dataPath +"/StreamingAssets"+"/sceneInfoXML.xml";
  15. 		#elif UNITY_IPHONE
  16. 		string filepath = Application.dataPath +"/Raw"+"/sceneInfoXML.xml";
  17. 		#endif
  18. 		//如果文件存在话开始解析。
  19. 		if(File.Exists (filepath))
  20. 		{
  21. 			XmlDocument xmlDoc = new XmlDocument();
  22. 			xmlDoc.Load(filepath);
  23. 			XmlNodeList nodeList = xmlDoc.SelectSingleNode("scenes").ChildNodes;
  24. 			foreach(XmlElement scene in nodeList)
  25. 			{
  26. 				//因为我的XML是把所有游戏对象全部导出， 所以这里判断一下只解析需要的场景中的游戏对象
  27. 				//JSON和它的原理类似
  28. 				if(!scene.GetAttribute("name").Equals("Assets/s1.unity"))
  29. 				{
  30. 					continue;
  31. 				}
  32.  
  33. 				//prefab放置在Resources/Prefab文件夹下
  34. 				//遍历所有gameobject
  35. 				foreach(XmlElement gameObject in scene.ChildNodes)
  36. 				{				
  37. 					string asset = "Prefab/" + gameObject.GetAttribute("name");
  38. 					Vector3 pos = Vector3.zero;
  39. 					Vector3 rot = Vector3.zero;
  40. 					Vector3 sca = Vector3.zero;
  41. 					XmlNode transform = gameObject.SelectSingleNode("transform");
  42.  
  43. 					foreach(XmlElement prs in transform.ChildNodes)
  44. 					{
  45. 						if(prs.Name == "position")
  46. 						{
  47. 							foreach(XmlElement position in prs.ChildNodes)
  48. 							{
  49. 								switch(position.Name)
  50. 								{
  51. 								case "x":
  52. 									pos.x = float.Parse(position.InnerText);
  53. 									break;
  54. 								case "y":
  55. 									pos.y = float.Parse(position.InnerText);
  56. 									break;
  57. 								case "z":
  58. 									pos.z = float.Parse(position.InnerText);
  59. 									break;
  60. 								}
  61. 							}
  62. 						}else if(prs.Name == "rotation")
  63. 						{
  64. 							foreach(XmlElement rotation in prs.ChildNodes)
  65. 							{
  66. 								switch(rotation.Name)
  67. 								{
  68. 								case "x":
  69. 									rot.x = float.Parse(rotation.InnerText);
  70. 									break;
  71. 								case "y":
  72. 									rot.y = float.Parse(rotation.InnerText);
  73. 									break;
  74. 								case "z":
  75. 									rot.z = float.Parse(rotation.InnerText);
  76. 									break;
  77. 								}
  78. 							}
  79. 						}else if(prs.Name == "scale")
  80. 						{
  81. 							foreach(XmlElement scale in prs.ChildNodes)
  82. 							{
  83. 								switch(scale.Name)
  84. 								{
  85. 								case "x":
  86. 									sca.x = float.Parse(scale.InnerText);
  87. 									break;
  88. 								case "y":
  89. 									sca.y = float.Parse(scale.InnerText);
  90. 									break;
  91. 								case "z":
  92. 									sca.z = float.Parse(scale.InnerText);
  93. 									break;
  94. 								}
  95. 							}
  96. 						}
  97. 					}	
  98. 					//拿到 旋转 缩放 平移 以后克隆新游戏对象
  99. 					GameObject ob = (GameObject)Instantiate(Resources.Load(asset),pos,Quaternion.Euler(rot));
  100. 					ob.transform.localScale = sca;
  101. 				}
  102. 			}
  103. 		}
  104. 	}
  105. }

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.IO;
  4. using LitJson;
  5.  
  6. public class ResolveSceneInfoJSON : MonoBehaviour {
  7.  
  8. 	// Use this for initialization
  9. 	void Start () 
  10. 	{
  11. 		#if UNITY_EDITOR
  12. 		string filepath = Application.dataPath +"/StreamingAssets"+"/sceneInfoJSON.txt";
  13. 		#elif UNITY_IPHONE
  14. 		string filepath = Application.dataPath +"/Raw"+"/json.txt";
  15. 		#endif	
  16. 		
  17. 		StreamReader sr  = File.OpenText(filepath);
  18. 		string strLine = sr.ReadToEnd();
  19. 		JsonData jd = JsonMapper.ToObject(strLine);
  20. 		JsonData scenes = jd["scenes"];
  21. 		int i,j;
  22. 		for (i = 0; i < scenes.Count; i++)
  23. 		{
  24. 			JsonData scene = scenes[i]["scene"];
  25. 			string sceneName = (string)scene["name"];
  26. 			if(!sceneName.Equals("Assets/s1.unity"))
  27. 			{
  28. 				continue;
  29. 			}
  30. 			JsonData gameObjects = scene["gameObjects"];
  31.  
  32. 			for (j = 0; j < gameObjects.Count; j++)
  33. 			{
  34. 				string objectName = (string)gameObjects[j]["name"];
  35. 				string asset = "Prefab/" + objectName;
  36. 				Vector3 pos = Vector3.zero;
  37. 				Vector3 rot = Vector3.zero;
  38. 				Vector3 sca = Vector3.zero;
  39. 				
  40. 				JsonData position = gameObjects[j]["position"];
  41. 				JsonData rotation = gameObjects[j]["rotation"];
  42. 				JsonData scale = gameObjects[j]["scale"];
  43.  
  44. 				pos.x = float.Parse((string)position[0]["x"]);
  45. 				pos.y = float.Parse((string)position[0]["y"]);
  46. 				pos.z = float.Parse((string)position[0]["z"]);
  47. 				
  48. 				rot.x = float.Parse((string)rotation[0]["x"]);
  49. 				rot.y = float.Parse((string)rotation[0]["y"]);
  50. 				rot.z = float.Parse((string)rotation[0]["z"]);
  51. 				
  52. 				sca.x = float.Parse((string)scale[0]["x"]);
  53. 				sca.y = float.Parse((string)scale[0]["y"]);
  54. 				sca.z = float.Parse((string)scale[0]["z"]);
  55. 				
  56. 				GameObject go = (GameObject)Instantiate(Resources.Load(asset),pos,Quaternion.Euler(rot));
  57. 				go.transform.localScale = sca;
  58. 			}
  59. 		}
  60. 	}
  61. }

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.IO;
  4. using System.Text;
  5. using System;
  6.  
  7. public class ResolveSceneInfoBinary : MonoBehaviour {
  8.  
  9. 	// Use this for initialization
  10. 	void Start () 
  11. 	{
  12. 		string filepath = Application.dataPath + @"/StreamingAssets/sceneInfoBinary.txt";
  13. 		
  14. 		if (File.Exists (filepath)) 
  15. 		{
  16. 			FileStream fs = new FileStream (filepath, FileMode.Open);
  17. 			BinaryReader br = new BinaryReader (fs);
  18.  
  19. 			string sceneName = br.ReadString();
  20. 			while(fs.Position < fs.Length)
  21. 			{
  22. 				string objName = br.ReadString();
  23. 				float px = br.ReadInt16() / 100f;
  24. 				float py = br.ReadInt16() / 100f;
  25. 				float pz = br.ReadInt16() / 100f;
  26. 				float rx = br.ReadInt16() / 100f;
  27. 				float ry = br.ReadInt16() / 100f;
  28. 				float rz = br.ReadInt16() / 100f;
  29. 				float sx = br.ReadInt16() / 100f;
  30. 				float sy = br.ReadInt16() / 100f;
  31. 				float sz = br.ReadInt16() / 100f;
  32.  
  33. 				string asset = "Prefab/" + objName;
  34. 				Vector3 pos = new Vector3 (px,py,pz);
  35. 				Vector3 rot = new Vector3(rx,ry,rz);
  36. 				Vector3 sca = new Vector3(sx,sy,sz);
  37. 				GameObject go = (GameObject)Instantiate(Resources.Load(asset),pos,Quaternion.Euler(rot));
  38. 				go.transform.localScale = sca;
  39. 			}
  40. 		}
  41. 	}
  42. }


上面使用的是Resources.Load，下面就使用AssetBundle吧！这里本人使用的是unity5的打包系统，先从本地服务器下载AB包到本地，再加载。

测试场景很简单，AB包有六个：总的AB包，3个物体的包，cube的材质，材质的纹理，下载后就把文件放在Application.streamingAssetsPath下，加载时就加载camera、cube和灯光。服务器是tomcat服务器，当然也可以跳过下载的过程，直接本地加载AB包。要注意的是，测试最好使用new WWW，而不是WWW.LoadFromCacheOrDownload，因为LoadFromCacheOrDownload需要提供一个版本号，如果不更改版本号就不会下载新的AB包了。




创建AB：

  1. using UnityEngine;
  2. using System.Collections;
  3. using UnityEditor;
  4.  
  5. /*
  6.  * 注意：
  7.  * 1.prefab的名称以及生成的AB包的名称最好不要带空格，否则从服务器下载AB包时,下载到本地的AB包可能为空。
  8.  * 2.prefab的名称最好全部小写，因为在设置AB包的名称时，unity会将设置的名称全部改为小写。
  9.  * 这样prefab的名称就可以与AB包的名称一一对应了
  10.  */
  11. public class CreateAssetBundle : Editor {
  12.  
  13. 	[MenuItem("Tool/SetFileBundleName")]
  14. 	static void SetBundleName()
  15. 	{
  16. 		#region 设置资源的AssetBundle的名称和文件扩展名
  17. 		UnityEngine.Object[] selects = Selection.objects;
  18. 		foreach (UnityEngine.Object selected in selects)
  19. 		{
  20. 			string path = AssetDatabase.GetAssetPath(selected);
  21. 			AssetImporter asset = AssetImporter.GetAtPath(path);
  22. 			asset.assetBundleName = selected.name; //设置Bundle文件的名称
  23. 			asset.assetBundleVariant = "unity3d";//设置Bundle文件的扩展名
  24. 			asset.SaveAndReimport();		
  25. 		}
  26. 		AssetDatabase .Refresh();
  27. 		#endregion
  28. 	}
  29.  
  30. 	[MenuItem("Tool/BuildAll")]
  31. 	static void Build()
  32. 	{
  33. 		BuildPipeline.BuildAssetBundles(Application.dataPath + "/AB");
  34. 	}
  35. }

下载AB： 

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.IO;
  4. using System.Text;
  5.  
  6. [RequireComponent(typeof(LoadAssetbBundle))]
  7. public class DownLoadAssetbBundle : MonoBehaviour {
  8.  
  9. 	//要下载的AB包
  10. 	string[] s = new string[]{"AB","directionallight","cube","camera","m1","t1"};
  11. 	
  12. 	// Use this for initialization
  13. 	void Start () 
  14. 	{
  15. 		//print (Application.dataPath);
  16. 		//print (Application.persistentDataPath);
  17. 		//print (Application.streamingAssetsPath);
  18. 		//print (Application.temporaryCachePath);
  19. 		
  20. 		StartCoroutine (DownLoad(s));
  21. 	}
  22. 	
  23. 	IEnumerator DownLoad(string[] assetBundleNames)
  24. 	{
  25. 		FileStream fs = null;
  26. 		for (int i = 0; i < assetBundleNames.Length; i++) 
  27. 		{
  28. 			string savePath;
  29. 			string url;
  30. 			if(assetBundleNames[i].Equals("AB"))
  31. 			{
  32. 				savePath = Application.streamingAssetsPath + "/" + assetBundleNames[i];
  33. 				url = "http://172.25.225.24:8080/UpdateServer" + "/" + assetBundleNames[i];
  34. 			}
  35. 			else
  36. 			{
  37. 				savePath = Application.streamingAssetsPath + "/" + assetBundleNames[i] + ".unity3d";
  38. 				url = "http://172.25.225.24:8080/UpdateServer" + "/" + assetBundleNames[i] + ".unity3d";
  39. 			}
  40. 			
  41. 			//如果不存在则下载AB，并保存到指定文件夹中
  42. 			if (!File.Exists (savePath)) 
  43. 			{
  44. 				fs = new FileStream(savePath, FileMode.Create);
  45. 				WWW www = new WWW (url);
  46. 				yield return www;
  47. 				byte[] bytes = www.bytes;
  48. 				print(assetBundleNames[i] + "   " + bytes.Length);
  49. 				fs.Write(bytes,0,bytes.Length);
  50. 			}
  51. 		}
  52. 		if (fs != null) 
  53. 		{
  54. 			fs.Close ();
  55. 			fs.Dispose ();
  56. 		}
  57.  
  58. 		//加载AB
  59. 		LoadAssetbBundle lab = GetComponent<LoadAssetbBundle> ();
  60. 		if (lab != null) 
  61. 		{
  62. 			lab.StartLoad("file://" + Application.streamingAssetsPath + "/",
  63.                           new string[] { "camera", "cube", "directionallight"});//要加载的AB包
  64. 		}
  65. 	}
  66. }

加载AB： 

  1. using UnityEngine;
  2. using System.Collections;
  3.  
  4. public class LoadAssetbBundle : MonoBehaviour {
  5. 	
  6. 	public void StartLoad(string assetBundlePath, string[] assetBundleNames)
  7. 	{
  8. 		StartCoroutine(LoadGo(assetBundlePath,assetBundleNames));
  9. 	}
  10.  
  11. 	/*
  12. 	 * assetBundlePath:Assetbundle的文件夹，末尾要加"/"
  13. 	 * assetBundleNames:要加载的AssetBundle的名字，不用加后缀
  14. 	 * 注意：www需要加后缀，而AssetBundle.LoadAsset不需要
  15. 	 * */
  16. 	IEnumerator LoadGo(string assetBundlePath, string[] assetBundleNames)
  17. 	{
  18. 		AssetBundleManifest manifest = null;
  19. 		//首先加载Manifest文件;
  20.         WWW mwww = new WWW(assetBundlePath + "AB");
  21. 		yield return mwww;
  22. 		if (!string.IsNullOrEmpty (mwww.error)) 
  23. 		{
  24. 			Debug.LogError (mwww.error);
  25. 		} 
  26. 		else 
  27. 		{
  28. 			AssetBundle ab = mwww.assetBundle;
  29. 			manifest = (AssetBundleManifest)ab.LoadAsset ("AssetBundleManifest");
  30. 			ab.Unload (false);
  31. 		}
  32.  
  33. 		for (int i = 0; i < assetBundleNames.Length; i++) 
  34. 		{
  35. 			//获取依赖文件列表;
  36. 			string[] depends = manifest.GetAllDependencies(assetBundleNames[i] + ".unity3d");
  37. 			AssetBundle[] dependsAssetBundle = new AssetBundle[depends.Length];
  38. 			
  39. 			for(int index = 0;index < depends.Length;index++)
  40. 			{
  41. 				//加载所有的依赖文件;
  42. 				WWW dwww = new WWW(assetBundlePath + depends[index]);
  43. 				yield return dwww;
  44. 				dependsAssetBundle[index] = dwww.assetBundle;
  45. 			}
  46. 			
  47. 			//加载我们需要的文件;
  48. 			WWW gowww = new WWW(assetBundlePath + assetBundleNames[i] + ".unity3d");
  49. 			yield return gowww;
  50. 			if(!string.IsNullOrEmpty(gowww.error))
  51. 			{
  52. 				Debug.LogError(gowww.error);
  53. 			}
  54. 			else
  55. 			{
  56. 				AssetBundle goAB = gowww.assetBundle;
  57.                 GameObject go = goAB.LoadAsset(assetBundleNames[i]) as GameObject;
  58. 				if(go != null)
  59. 				{
  60. 					Instantiate(go);
  61. 				}
  62. 				goAB.Unload(false);
  63. 			}
  64. 			
  65. 			//卸载依赖文件的包
  66. 			for(int index = 0;index < depends.Length;index++)
  67. 			{
  68. 				dependsAssetBundle[index].Unload(false);
  69. 			}
  70. 		}
  71. 	}
  72. }


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