cocos2d-x 2.2 资源更新AssetsManager例子代码

//
//  UpgradeLayer.h
//  AmazeDemo
//
//  Created by lsw on 14-3-26.
//
//

#ifndef AmazeDemo_UpgradeLayer_h
#define AmazeDemo_UpgradeLayer_h
#include "cocos2d.h"
#include "AssetsManager.h"

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

static cocos2d::CCScene *scene();
virtual bool init();

void upgrade(cocos2d::CCObject *pSender);
void reset(cocos2d::CCObject *pSender);

/* @brief Call back function for error
@param errorCode Type of error
*/
virtual void onError(cocos2d::extension::AssetsManager::ErrorCode errorCode);
/** @brief Call back function for recording downloading percent
@param percent How much percent downloaded
@warn This call back function just for recording downloading percent.
AssetsManager will do some other thing after downloading, you should
write code in onSuccess() after downloading.
*/
virtual void onProgress(int percent);
/** @brief Call back function for success
*/
virtual void onSuccess();
CREATE_FUNC(UpgradeLayer);
private:
cocos2d::extension::AssetsManager *getAssetManager();
void initDownloadDir();
private:
std::string pathToSave;
cocos2d::CCLabelTTF *_showDownloadInfo;
};

#endif

//实现cpp

//
//  UpgradeLayer.cpp
//  AmazeDemo
//
//  Created by lsw on 14-3-26.
//
//

#include "UpgradeLayer.h"

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

USING_NS_CC;
USING_NS_CC_EXT;
using namespace std;

UpgradeLayer::UpgradeLayer()
:pathToSave("")
,_showDownloadInfo(NULL)
{

}

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

CCScene* UpgradeLayer::scene()
{
CCScene *scene = CCScene::create();
UpgradeLayer *layer = UpgradeLayer::create();
scene->addChild(layer);
return scene;
}

bool UpgradeLayer::init()
{
if (!CCLayer::init())
{
return false;
}

initDownloadDir();
_showDownloadInfo = CCLabelTTF::create("", "Arial", 25);
this->addChild(_showDownloadInfo);
_showDownloadInfo->setAnchorPoint(ccp(0, 0));
_showDownloadInfo->setPosition(ccp(20, 20));

CCMenuItemLabel *itemLabel1 = CCMenuItemLabel::create(CCLabelTTF::create("reset", "Arail", 20), this, menu_selector(UpgradeLayer::reset));

CCMenuItemLabel *itemLabel2 = CCMenuItemLabel::create(CCLabelTTF::create("upgrade", "Arail", 20), this, menu_selector(UpgradeLayer::upgrade));

CCMenu *menu = CCMenu::create(itemLabel1, itemLabel2, NULL);
this->addChild(menu);
CCSize winSize = CCDirector::sharedDirector()->getWinSize();
itemLabel1->setPosition(ccp(winSize.width/2, winSize.height/2 + 20));
itemLabel2->setPosition(ccp(winSize.width/2, winSize.height/2 - 20));

menu->setPosition(ccp(0, 0));

return true;
}

void UpgradeLayer::onError(AssetsManager::ErrorCode errorCode)
{
if (errorCode == AssetsManager::kNoNewVersion)
{
_showDownloadInfo->setString("no new version");
}
else if (errorCode == AssetsManager::kNetwork)
{
_showDownloadInfo->setString("network err");
}
}

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

void UpgradeLayer::onSuccess()
{
_showDownloadInfo->setString("download success");
}

AssetsManager* UpgradeLayer::getAssetManager()
{
static AssetsManager *assetManager = NULL;
if (!assetManager)
{
assetManager = new AssetsManager("https://raw.github.com/minggo/AssetsManagerTest/master/package.zip",
"https://raw.github.com/minggo/AssetsManagerTest/master/version",
pathToSave.c_str());
assetManager->setDelegate(this);
assetManager->setConnectionTimeout(3);
}
return assetManager;
}

void UpgradeLayer::initDownloadDir()
{
pathToSave = CCFileUtils::sharedFileUtils()->getWritablePath();
pathToSave += "tmpDir";

#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
}

void UpgradeLayer::reset(CCObject *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
string command = "rd /s /q ";
// Path may include space.
command += "\"" + pathToSave + "\"";
system(command.c_str());
#endif
getAssetManager()->deleteVersion();
initDownloadDir();
}

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

}