iOS 检测版本更新

iOS 检测版本更新

如果我们要检测app版本的更新,那么我们必须获取当前运行app版本的版本信息和AppStore 上发布的最新版本的信息。


当前运行版本信息可以通过info.plist文件中的bundle version中获取:

NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];  
    CFShow(infoDic);  
      
    NSString *appVersion = [infoDic objectForKey:@"CFBundleVersion"];

这样就获取到当前运行的app的版本了


要获取当前app store上的最新的版本,有两种方法,

一、在某特定的服务器上,发布和存储app最新的版本信息,需要的时候向该服务器请求查询。


二、从app store上查询,可以获取到app的作者,连接,版本等。官方相关文档

www.apple.com/itunes/affiliates/resources/documentation/itunes-store-web-service-search-api.htm


具体步骤如下:
1,用 POST 方式发送请求:
http://itunes.apple.com/search?term=你的应用程序名称&entity=software

更加精准的做法是根据 app 的 id 来查找:
http://itunes.apple.com/lookup?id=你的应用程序的ID

#define APP_URL http://itunes.apple.com/lookup?id=你的应用程序的ID

你的应用程序的ID 是 itunes connect里的 Apple ID

2,从获得的 response 数据中解析需要的数据。因为从 appstore 查询得到的信息是 JSON 格式的,所以需要经过解析。解析之后得到的原始数据就是如下这个样子的:

{
    resultCount = 1;
    results =     (
                {
            artistId = 开发者 ID;
            artistName = 开发者名称;
            price = 0;
            isGameCenterEnabled = 0;
            kind = software;
            languageCodesISO2A =             (
                EN
            );
            trackCensoredName = 审查名称;
            trackContentRating = 评级;
            trackId = 应用程序 ID;
            trackName = 应用程序名称";
            trackViewUrl = 应用程序介绍网址;
            userRatingCount = 用户评级;
            userRatingCountForCurrentVersion = 1;
            version = 版本号;
            wrapperType = software;
      }
    );
}


然后从中取得 results 数组即可,具体代码如下所示:

NSDictionary *jsonData = [dataPayload JSONValue];
NSArray *infoArray = [jsonData objectForKey:@"results"];
NSDictionary *releaseInfo = [infoArray objectAtIndex:0];
NSString *latestVersion = [releaseInfo objectForKey:@"version"];
NSString *trackViewUrl = [releaseInfo objectForKey:@"trackViewUrl"];
 
如果你拷贝 trackViewUrl 的实际地址,然后在浏览器中打开,就会打开你的应用程序在 appstore 中的介绍页面。当然我们也可以在代码中调用 safari 来打开它。
UIApplication *application = [UIApplication sharedApplication];
[application openURL:[NSURL URLWithString:trackViewUrl]];


代码如下:

-(void)onCheckVersion
{
    NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
    //CFShow((__bridge CFTypeRef)(infoDic));
    NSString *currentVersion = [infoDic objectForKey:@"CFBundleVersion"];

    NSString *URL = @"http://itunes.apple.com/lookup?id=你的应用程序的ID";
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:URL]];
    [request setHTTPMethod:@"POST"];
    NSHTTPURLResponse *urlResponse = nil;
    NSError *error = nil;
    NSData *recervedData = [NSURLConnection sendSynchronousRequest:requestreturningResponse:&urlResponse error:&error];
    
    NSString *results = [[NSString alloc] initWithBytes:[recervedData bytes] length:[recervedData length] encoding:NSUTF8StringEncoding];
    NSDictionary *dic = [results JSONValue];
    NSArray *infoArray = [dic objectForKey:@"results"];
    if ([infoArray count]) {
        NSDictionary *releaseInfo = [infoArray objectAtIndex:0];
        NSString *lastVersion = [releaseInfo objectForKey:@"version"];
        
        if (![lastVersion isEqualToString:currentVersion]) {
            //trackViewURL = [releaseInfo objectForKey:@"trackVireUrl"];
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"更新" message:@"有新的版本更新,是否前往更新?" delegate:self cancelButtonTitle:@"关闭" otherButtonTitles:@"更新",nil];
            alert.tag = 10000;
            [alert show];
        }
        else
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"更新" message:@"此版本为最新版本" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            alert.tag = 10001;
            [alert show];
        }
    }
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView.tag==10000) {
        if (buttonIndex==1) {
            NSURL *url = [NSURL URLWithString:@"https://itunes.apple.com"];
            [[UIApplication sharedApplication]openURL:url];
        }
    }
}


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