cocos2d-js 热更新模块 使用AssetsManager

原帖子地址：http://cn.cocos2d-x.org/tutorial/show?id=1186

在这个文章中原作者已经说的很清楚，我在这个其他改动一些适用我项目中需求

1.满足Web和Native一套工程：为了维护方便

2.检测更新每天只执行一次：每次打开会等待,一天打开多次会卡多次。这个改动只适合自己的

AssetsManager 类：

1. var __failCount = 0;
2. toFix = function(num, length) {
3. return ('' + num).length < length ? ((new Array(length + 1)).join('0') + num).slice(-length) : '' + num;
4. };
5. var AssetsManagerLoaderScene = cc.Scene.extend({
6. _am:null,
7. _progress:null,
8. _percent:0,
9. _percentByFile:0,
10. _progressText : "",
11. run:function(){
12. if (!cc.sys.isNative){
13. this.loadGame();
14. return;
15. }
16. else{
17. var myDate = new Date();
18. var year = myDate.getFullYear();
19. var month = toFix(myDate.getMonth() + 1,2);
20. var day = toFix(myDate.getDate(),2);
21. var nowDate = year + "" + month + "" + day;
22. var lastDate = cc.sys.localStorage.getItem("kAssetsDate");
23. //一天只检测一次
24. if(parseInt(nowDate) > parseInt(lastDate)
25. || lastDate == null
26. || lastDate == undefined
27. || lastDate == ""){
28. cc.sys.localStorage.setItem("kAssetsDate",nowDate);
29. }
30. else{
31. this.loadGame();
32. return;
33. }
34. }
35. var layer = new cc.Layer();
36. this.addChild(layer);
37. this._progressText = "升级中 ";
38. if(cc.sys.language == cc.sys.LANGUAGE_ENGLISH){
39. this._progressText = "UPDATING ";
40. }
41. this._progress = new cc.LabelTTF(this._progressText +"0.00%", "Arial", 40);
42. this._progress.x = cc.winSize.width / 2;
43. this._progress.y = cc.winSize.height / 2 + 50;
44. layer.addChild(this._progress);
45. // android: /data/data/com.huanle.magic/files/
46. var storagePath = (jsb.fileUtils ? jsb.fileUtils.getWritablePath() : "/");
47. cc.log("AssetsManagerLoaderScene storagePath="+storagePath);
48. this._am = new jsb.AssetsManager("res/project.manifest", storagePath);
49. this._am.retain();
50. if (!this._am.getLocalManifest().isLoaded())
51. {
52. cc.log("Fail to update assets, step skipped.");
53. this.loadGame();
54. }
55. else
56. {
57. //            cc.log("packageUrl = "+);
58. var that = this;
59. var listener = new jsb.EventListenerAssetsManager(this._am, function(event) {
60. cc.log("listener................");
61. switch (event.getEventCode()){
62. case jsb.EventAssetsManager.ERROR_NO_LOCAL_MANIFEST:
63. cc.log("No local manifest file found, skip assets update.");
64. that.loadGame();
65. break;
66. case jsb.EventAssetsManager.UPDATE_PROGRESSION:
67. that._percent = event.getPercent();
68. that._percentByFile = event.getPercentByFile();
69. cc.log(that._percent + "%");
70. var msg = event.getMessage();
71. if (msg) {
72. cc.log(msg);
73. }
74. break;
75. case jsb.EventAssetsManager.ERROR_DOWNLOAD_MANIFEST:
76. case jsb.EventAssetsManager.ERROR_PARSE_MANIFEST:
77. cc.log("Fail to download manifest file, update skipped.");
78. that.loadGame();
79. break;
80. case jsb.EventAssetsManager.ALREADY_UP_TO_DATE:
81. case jsb.EventAssetsManager.UPDATE_FINISHED:
82. cc.log("Update finished.");
83. that.loadGame();
84. break;
85. case jsb.EventAssetsManager.UPDATE_FAILED:
86. cc.log("Update failed. " + event.getMessage());
87. __failCount ++;
88. if (__failCount < 5)
89. {
90. that._am.downloadFailedAssets();
91. }
92. else
93. {
94. cc.log("Reach maximum fail count, exit update process");
95. __failCount = 0;
96. that.loadGame();
97. }
98. break;
99. case jsb.EventAssetsManager.ERROR_UPDATING:
100. cc.log("Asset update error: " + event.getAssetId() + ", " + event.getMessage());
101. //                        that.loadGame();
102. break;
103. case jsb.EventAssetsManager.ERROR_DECOMPRESS:
104. cc.log(event.getMessage());
105. that.loadGame();
106. break;
107. default:
108. break;
109. }
110. });
111. cc.eventManager.addListener(listener, 1);
112. this._am.update();
113. cc.director.runScene(this);
114. }
115. this.schedule(this.updateProgress, 0.5);
116. },
117. loadGame:function(){
118. cc.log("loadGame");
119. if (cc.sys.isNative){
120. cc.loader.loadJs(["src/files.js"], function(err){
121. cc.loader.loadJs(jsFiles, function(err){
122. cc.LoaderScene.preload(g_resources, function () {
123. cc.director.runScene(new MainScene());
124. }, this);
125. });
126. });
127. }
128. else{
129. cc.LoaderScene.preload(g_resources, function () {
130. cc.director.runScene(new MainScene());
131. }, this);
132. }
133. },
134. updateProgress:function(dt){
135. this._progress.string = this._progressText + this._percent.toFixed(2)+"%";//"" + this._percent;
136. },
137. onExit:function(){
138. cc.log("AssetsManager::onExit");
139. this._am.release();
140. this._super();
141. }
142. });