Cocos2d-x 3.2 自动更新 -- 使用AssetsManager更新游戏资源包

Android和win32已经测试通过，理论上IOS也可以。

1、AssetsManagerDelegateProtocol

AssetsManagerDelegateProtocol，用于与服务器校验版本号，更新下载资源包，并对成功、出错、下载进度等进行回调。

2、资源包名称

所下载资源包名称默认为：cocos2dx-update-temp-package.zip。

如果想要修改文件名，直接修改引擎下 extensions\assets-manager\AsetsManager.ccp中的TEMP_PACKAGE_FILE_NAME

3、服务器

下以是我的资源包路径和本版号。

http://shezzer.sinaapp.com/downloadTest/cocos2dx-update-temp-package.zip

http://shezzer.sinaapp.com/downloadTest/version.php

4、实现

 //  Upgrade.h
 //<img src="http://img.blog.csdn.net/20140728093037654?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvTGlhbmdzaGFvemU=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="" />
 //  Created by Sharezer on 14-07-26.
 //
 //

 #ifndef _UPGRADE_H_
 #define _UPGRADE_H_
 #include "cocos2d.h"
 #include "extensions/cocos-ext.h"

 class Upgrade : public cocos2d::CCLayer, public cocos2d::extension::AssetsManagerDelegateProtocol
 {
 public:
     Upgrade();
     virtual ~Upgrade();

     virtual bool init();

     void upgrade(cocos2d::Ref* pSender);    //检查版本更新
     void reset(cocos2d::Ref* pSender);      //重置版本

     virtual void onError(cocos2d::extension::AssetsManager::ErrorCode errorCode);       //错误信息
     virtual void onProgress(int percent);   //更新下载进度
     virtual void onSuccess();       //下载成功
     CREATE_FUNC(Upgrade);
 private:
     cocos2d::extension::AssetsManager* getAssetManager();
     void initDownloadDir();     //创建下载目录

 private:
     std::string _pathToSave;
     cocos2d::Label *_showDownloadInfo;
 };


 #endif

 //Upgrade.cpp

 #include "Upgrade.h"
 #include "HelloWorldScene.h"

 #if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
 #include <dirent.h>
 #include <sys/stat.h>
 #endif

 USING_NS_CC;
 USING_NS_CC_EXT;

 #define DOWNLOAD_FIEL       "download"  //下载后保存的文件夹名

 Upgrade::Upgrade():
 _pathToSave(""),
 _showDownloadInfo(NULL)
 {

 }

 Upgrade::~Upgrade()
 {
     AssetsManager* assetManager = getAssetManager();
     CC_SAFE_DELETE(assetManager);
 }

 bool Upgrade::init()
 {
     if (!CCLayer::init())
     {
         return false;
     }
     Size winSize = Director::getInstance()->getWinSize();
     initDownloadDir();
     _showDownloadInfo = Label::createWithSystemFont("", "Arial", 20);
     this->addChild(_showDownloadInfo);
     _showDownloadInfo->setPosition(Vec2(winSize.width / 2, winSize.height / 2 - 20));


     auto itemLabel1 = MenuItemLabel::create(
         Label::createWithSystemFont("Reset", "Arail", 20), CC_CALLBACK_1(Upgrade::reset, this));
     auto itemLabel2 = MenuItemLabel::create(
         Label::createWithSystemFont("Upgrad", "Arail", 20), CC_CALLBACK_1(Upgrade::upgrade, this));

     auto menu = Menu::create(itemLabel1, itemLabel2, NULL);
     this->addChild(menu);

     itemLabel1->setPosition(Vec2(winSize.width / 2, winSize.height / 2 + 20));
     itemLabel2->setPosition(Vec2(winSize.width / 2, winSize.height / 2 ));

     menu->setPosition(Vec2::ZERO);

     return true;
 }

 void Upgrade::onError(AssetsManager::ErrorCode errorCode)
 {
     if (errorCode == AssetsManager::ErrorCode::NO_NEW_VERSION)
     {
         _showDownloadInfo->setString("no new version");
     }
     else if (errorCode == AssetsManager::ErrorCode::NETWORK)
     {
         _showDownloadInfo->setString("network error");
     }
     else if (errorCode == AssetsManager::ErrorCode::CREATE_FILE)
     {
         _showDownloadInfo->setString("create file error");
     }
 }

 void Upgrade::onProgress(int percent)
 {
     if (percent < 0)
         return;
     char progress[20];
     snprintf(progress, 20, "download %d%%", percent);
     _showDownloadInfo->setString(progress);
 }

 void Upgrade::onSuccess()
 {
     CCLOG("download success");
     _showDownloadInfo->setString("download success");
     std::string path = FileUtils::getInstance()->getWritablePath() + DOWNLOAD_FIEL;
     //FileUtils::getInstance()->addSearchPath(path, true);
     auto scene = HelloWorld::scene();
     Director::getInstance()->replaceScene(scene);
 }

 AssetsManager* Upgrade::getAssetManager()
 {
     static AssetsManager *assetManager = NULL;
     if (!assetManager)
     {
         assetManager = new AssetsManager("http://shezzer.sinaapp.com/downloadTest/cocos2dx-update-temp-package.zip",
             "http://shezzer.sinaapp.com/downloadTest/version.php",
             _pathToSave.c_str());
         assetManager->setDelegate(this);
         assetManager->setConnectionTimeout(3);
     }
     return assetManager;
 }

 void Upgrade::initDownloadDir()
 {
     CCLOG("initDownloadDir");
     _pathToSave = CCFileUtils::getInstance()->getWritablePath();
     _pathToSave += DOWNLOAD_FIEL;
 CCLOG("Path: %s", _pathToSave.c_str());
 #if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
     DIR *pDir = NULL;
     pDir = opendir(_pathToSave.c_str());
     if (!pDir)
     {
         mkdir(_pathToSave.c_str(), S_IRWXU | S_IRWXG | S_IRWXO);
     }
 #else
     if ((GetFileAttributesA(_pathToSave.c_str())) == INVALID_FILE_ATTRIBUTES)
     {
         CreateDirectoryA(_pathToSave.c_str(), 0);
     }
 #endif
     CCLOG("initDownloadDir end");
 }

 void Upgrade::reset(Ref* pSender)
 {
     _showDownloadInfo->setString("");
     // Remove downloaded files
 #if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
     string command = "rm -r ";
     // Path may include space.
     command += "\"" + _pathToSave + "\"";
     system(command.c_str());
 #else
     std::string command = "rd /s /q ";
     // Path may include space.
     command += "\"" + _pathToSave + "\"";
     system(command.c_str());
 #endif
     getAssetManager()->deleteVersion();
     initDownloadDir();
 }

 void Upgrade::upgrade(Ref* pSender)
 {
     _showDownloadInfo->setString("");
     getAssetManager()->update();

 }

运行：

Reset：重置版本号，办删除下载资源。

Upgrad：校验版本号，当有更新时下载新资源。

_pathToSave保存着文件的下载路径，压缩包下载下来后，将被自动解压到_pathToSave中。

以win32为，在cocos2d-x\build\Debug.win32\  中，可以看到我们之前设置的下载目录download。

onSuccess中，当下载成功后，将跳转到HelloWorld。

这时可以在HelloWorld中直接使用已下载的资源。

具体实现代码见下载地址：点击打开链接

转自：http://blog.csdn.net/liangshaoze/article/details/38224013