iOS开发 app版本更新, 提醒

/**
     *  检测版本升级需要用到的参数
     */

   iFeverAPPID = @"1076057848”; //appId;

//调用检测版本更新的方法

    [selfcheckVersion];

*
 *  检测软件是否需要升级
 */
-(void)checkVersion
{
    //获取当前应用版本号
    NSDictionary *appInfo = [[NSBundlemainBundle] infoDictionary];
    NSString *currentVersion = [appInfoobjectForKey:@"CFBundleVersion"];
    //  用__block才能在局部作用域中改变变量的值
    __block NSString *newVersion = @"";
    NSString *updateUrlString = [NSStringstringWithFormat:@"http://itunes.apple.com/lookup?id=%ld",(long)[iFeverAPPIDintegerValue]];
   
    NSString * str = [updateUrlStringstringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManagermanager];
    [manager GET:str parameters:nil success:^(AFHTTPRequestOperation*operation, id responseObject) {
        NSLog(@"123 + %@", operation);
        NSDictionary *resultDic = responseObject;
        NSArray *resultArray = [resultDicobjectForKey:@"results"];
       
        for (idconfig in resultArray) {
            newVersion = [config valueForKey:@"version"];
        }
        if (newVersion) {
            NSLog(@"通过AppStore获取的版本号是：%@", newVersion);
        }
       

result == 1

        NSComparisonResult result = [newVersion compare:currentVersion];

        if (result == 1) { //appstore 版本大于当前版本
            NSString *versionMessageStr = [NSStringstringWithFormat:@"当前版本%@,最新版本为%@,请升级.",currentVersion,newVersion];
            UIAlertView *alert = [[UIAlertViewalloc] initWithTitle:@"升级提示!"message: versionMessageStr delegate:self cancelButtonTitle:@"下次再说"otherButtonTitles:@"现在升级",nil];
            alert.tag = kVersionNeedUpdateAlertTag;
            [alert show];
        }
       
    } failure:^(AFHTTPRequestOperation*operation, NSError *error) {
        NSLog(@"234 + %@", error);
    }];
}


#pragma mark - UIAlertDelegate Method
//收到推送时程序正在前台运行，则给出一个alert，用户选择查看，执行这个方法，并且跳转到指定页面
-(void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 1) {
        //软件需要更新提醒
        if (alertView.tag== kVersionNeedUpdateAlertTag) {
            NSURL *url = [NSURLURLWithString:[NSStringstringWithFormat:@"https://itunes.apple.com/cn/app/wan-zhuan-quan-cheng/id%@?mt=8",iFeverAPPID]];

            [[UIApplicationsharedApplication]openURL:url];

           

        }
    }

}