cocos2d-x 下载网络视频、音乐保存到沙盒

@H_696_1@2015.12.19
在此前完成的一个APP中有下载网络视频、音乐的客户需求，我自己封装了一个类。希望能够帮到大家。我使用的cocos2d-x的版本是3.4。

Downloader

@H_696_1@这是cocos2d封装的一个用于下载网络数据的类，支持同步以及异步下载。更详细的类方法大家可以进去看。
使用时加上头文件。#include “extensions/assets-manager/Downloader.h”

实际调用：

@H_696_1@第一个参数：音乐名的字符串，例如”song.mp3”
第二个参数：连接地址，例如”www.fffffffffffff.mp3”
httpDownLoadingHelper::geTinstance()->DownloadMusicToSandBox(“song.mp3”,“www.fffffffffffff.mp3”);

以下将我封装的httpDownLoadingHelper类源码贴上,下载音乐和下载视频的用法是一样。

@H_696_1@httpDownLoadingHelper.h

#include <stdio.h>
#include "extensions/assets-manager/Downloader.h"
#include "cocos2d.h"
USING_NS_Cc;

typedef std::function<void(int progress)> myProgressCallBACk;

class httpDownLoadingHelper : public Node
{
public:
    virtual bool init();
    CREATE_FUNC(httpDownLoadingHelper);
    static httpDownLoadingHelper *geTinstance();
public:
    //video
    void DownloadVideoToSandBox(std::String videoNameStirng,std::String urlLink);
    //music
    void DownloadMusicToSandBox(std::String musicNameStirng,std::String urlLink);

private:
    //video
    void errorCallBACk(const cocos2d::extension::Downloader::Error& error);
    void VideoprogressCallBACk(double @R_552_10586@lToDownload,double nowDownloaded,const std::String& url,const std::String& customId);
    void VideosuccessCallBACk(const std::String& url,const std::String& path,const std::String& customId);

   //music
    void MusicprogressCallBACk(double @R_552_10586@lToDownload,const std::String& customId);
    void MusicerrorCallBACk(const cocos2d::extension::Downloader::Error& error);
    void MusicsuccessCallBACk(const std::String& url,const std::String& customId);

private:
    std::shared_ptr<cocos2d::extension::Downloader> _myVideoDownloader;
    std::shared_ptr<cocos2d::extension::Downloader> _mymusicDownloader;
};

@H_696_1@httpDownLoadingHelper.cpp

#include "httpDownLoadingHelper.hpp"
#include "XMLUIVideoPlayer.hpp"
#include "XMLUIMusicPlayer.hpp"
static httpDownLoadingHelper *g_instance = NULL;
//static int g_imageCount = 1;

httpDownLoadingHelper *httpDownLoadingHelper::geTinstance()
{
    if (g_instance == NULL) {
        g_instance = httpDownLoadingHelper::create();
        g_instance->retain();
    }
    return g_instance;
}

bool httpDownLoadingHelper::init()
{
    if ( !Node::init() )
    {
        return false;
    }

    return true;
}
void httpDownLoadingHelper::DownloadVideoToSandBox(std::string videoNameStirng,std::string urlLink)
{
    _myVideoDownloader = std::shared_ptr<cocos2d::extension::Downloader>(new cocos2d::extension::Downloader);
// std::shared_ptr<cocos2d::extension::Downloader> myDownloader(new cocos2d::extension::Downloader);

    _myVideoDownloader->setErrorCallBACk(std::bind(&httpDownLoadingHelper::errorCallBACk,g_instance,std::placeholders::_1));

    _myVideoDownloader->setProgressCallBACk(std::bind(&httpDownLoadingHelper::VideoprogressCallBACk,std::placeholders::_1,std::placeholders::_2,std::placeholders::_3,std::placeholders::_4));

    _myVideoDownloader->setsuccessCallBACk(std::bind(&httpDownLoadingHelper::VideosuccessCallBACk,std::placeholders::_3));

    _myVideoDownloader->setConnectionTimeout(5);

    std::string path = FileUtils::geTinstance()->getWritablePath() + videoNameStirng;

    std::string remote = urlLink;

    cocos2d::log("Downloading '%s' into '%s'",remote.c_str(),path.c_str());

    _myVideoDownloader->downloadAsync(remote,path,videoNameStirng);
}

void httpDownLoadingHelper::errorCallBACk(const cocos2d::extension::Downloader::Error& error)
{
    cocos2d::log("error downloading: %s - %s",error.url.c_str(),error.message.c_str());
}

void httpDownLoadingHelper::VideoprogressCallBACk(double @R_552_10586@lToDownload,double nowDownloaded,const std::string& url,const std::string& customId)
{
    cocos2d::log("%s",customId.c_str());
    cocos2d::log("video(%s) download progress: %d%% - %s",customId.c_str(),(int)((nowDownloaded/@R_552_10586@lToDownload)*100),url.c_str());
    XMLUIVideoPlayer::SetDownloadProgress({
        @H_549_26@mAX(1,static_cast<float>((int)((nowDownloaded/@R_552_10586@lToDownload)*100))),customId
    });
}

void httpDownLoadingHelper::VideosuccessCallBACk(const std::string& url,const std::string& path,const std::string& customId)
{
    cocos2d::log("download finished: %s",path.c_str());
}

//music
void httpDownLoadingHelper::DownloadMusicToSandBox(std::string musicNameStirng,std::string urlLink)
{
    _mymusicDownloader = std::shared_ptr<cocos2d::extension::Downloader>(new cocos2d::extension::Downloader);

    _mymusicDownloader->setErrorCallBACk(std::bind(&httpDownLoadingHelper::MusicerrorCallBACk,std::placeholders::_1));

    _mymusicDownloader->setProgressCallBACk(std::bind(&httpDownLoadingHelper::MusicprogressCallBACk,std::placeholders::_4));

    _mymusicDownloader->setsuccessCallBACk(std::bind(&httpDownLoadingHelper::MusicsuccessCallBACk,std::placeholders::_3));

    _mymusicDownloader->setConnectionTimeout(5);

    std::string path = FileUtils::geTinstance()->getWritablePath() + musicNameStirng;

    std::string remote = urlLink;

    cocos2d::log("Downloading '%s' into '%s'",path.c_str());

    _mymusicDownloader->downloadAsync(remote,musicNameStirng);

}
void httpDownLoadingHelper::MusicprogressCallBACk(double @R_552_10586@lToDownload,const std::string& customId)
{
    cocos2d::log("music(%s) download progress: %d%% - %s",url.c_str());

    XMLUIMusicPlayer::MusicSetDownloadProgress({
        @H_549_26@mAX(1,customId
    });
}
void httpDownLoadingHelper::MusicerrorCallBACk(const cocos2d::extension::Downloader::Error& error)
{
    cocos2d::log("error downloading: %s - %s",error.message.c_str());

}
void httpDownLoadingHelper::MusicsuccessCallBACk(const std::string& url,path.c_str());
}