iOS 应用版本对比

本文的目的就一个,通过对比 App Store 成功发布的App 版本号 来确认当前手机中安装的客户端版本号是否有区别.

如果有区别,那么可以提示用户可以去App Store 升级了.

首先是获取App Store 某个应用的版本号,提供App ID  即可,返回Json形式的字符串

http://itunes.apple.com/lookup?id=507704613

接下来通过 NSMutableURLRequest 和NSURLConnection  访问上面的Url  获取Json串,代码如下:

NSString *post=nil;
post=[[NSString alloc]initWithFormat:@"id=%@",_appID];//testid为你的appid
NSData *postData=[post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength=[NSString stringWithFormat:@"%d",[postData length]];
NSMutableURLRequest *request=[[NSMutableURLRequest alloc]init];
[request setURL:[NSURL URLWithString:@"http://itunes.apple.com/lookup?"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];    

NSURLConnection *conn=[[NSURLConnection alloc]initWithRequest:request delegate:self];
[request release];
[conn release];
[post release];

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [_appInfoData appendData:data];
}
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSString *jsonString=[[NSString alloc] initWithData:_appInfoData encoding:NSUTF8StringEncoding];
    SBJsonParser *jsonParser = [[SBJsonParser alloc] init];
    NSDictionary *jsonData = (NSDictionary *)[jsonParser objectWithString:jsonString error:NULL];
}

将NSDictionary打印出如下结构数据

{

    resultCount = 1;

    results =(

                {

            artistId =公司 ID;

            artistName = "公司名称";

            artistViewUrl = "公司地址,可以看到本公司发布的其他App";

            artworkUrl100 = "大版的App ICON 1024*1024";

            artworkUrl512 = "大版的App ICON 1024*1024";

            artworkUrl60 = "小版的App ICON 57*57";

            bundleId = "com.flyrise.FEOA";//App Identifier

            contentAdvisoryRating = "4+";

            currency = USD;

            description = "描述";

            features = ();

            fileSizeBytes = 4166039;

            formattedPrice = Free;

            genreIds = (

                6000,

                6015

            );

            genres = (

                Business,

                Finance

            );

            ipadScreenshotUrls = (

            );

            isGameCenterEnabled = 0;

            kind = software;

            languageCodesISO2A = (

                ZH

            );

            price = 0;

            primaryGenreId = 6000;

            primaryGenreName = Business;

            releaseDate = "2012-05-18T10:36:58Z";

            releaseNotes = "新版本发布描述";

            screenshotUrls =(

                "介绍图片1",

                "介绍图片2",

                "介绍图片3",

                "介绍图片4",

                "介绍图片5"

            );

            sellerName = "ZHUHAI FLYRISE Co.,LTD";

            supportedDevices =             (

                all

            );

            trackCensoredName = "App 名称";

            trackContentRating = "4+";

            trackId =App ID;

            trackName = "App 名称";

            trackViewUrl = "http://itunes.apple.com/us/app/ye-wu-xie-zuo-ping-tai/id507704613?mt=8&uo=4";//App Store 某个App 的地址

            version = "5.5.1";//App 当前版本号,进行版本对比的重点

            wrapperType = software;

        }

    );

}

通过转换后的NSDictionary 获取App Store发布成功的App 版本号

NSArray *infoArrays=[jsonData objectForKey:@"results"];
NSDictionary *releaseInfo=[infoArrays objectAtIndex:0];
NSString *releaseVersion =[releaseInfo objectForKey:@"version"];

NSString *localVersion =[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];