iOS開發 app版本更新, 提醒

/**
     *  檢測版本升級需要用到的參數
     */    iFeverAPPID = @"1076057848”; //appId; //調用檢測版本更新的方法     [selfcheckVersion];
*
 *  檢測軟體是否需要升級
 */
-(void)checkVersion
{
    //擷取當前應用版本號碼
    NSDictionary *appInfo = [[NSBundlemainBundle] infoDictionary];
    NSString *currentVersion = [appInfoobjectForKey:@"CFBundleVersion"];
    //  用__block才能在局部範圍中改變變數的值
    __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(@"通過AppStore擷取的版本號碼是：%@", newVersion);
        }
       

result == 1

        NSComparisonResult result = [newVersion compare:currentVersion];
        if ( result == 1 ) { //appstore 版本大於目前的版本
            NSString *versionMessageStr = [ NSString stringWithFormat : @" 目前的版本 %@, 最新版本為 %@, 請升級 ." ,currentVersion,newVersion];
            UIAlertView *alert = [[ UIAlertView alloc ] initWithTitle : @" 升級提示 !" message : versionMessageStr delegate : self cancelButtonTitle : @" 下次再說 " otherButtonTitles : @" 現在升級 " , nil ];
            alert. tag = kVersionNeedUpdateAlertTag ;
            [alert show ];
        }
       
    } failure :^( AFHTTPRequestOperation *operation, NSError *error) {
        NSLog ( @"234 + %@" , error);
    }];
}


#pragma mark - UIAlertDelegate Method
// 收到推送時程式正在前台運行，則給出一個 alert ，使用者選擇查看，執行這個方法，並且跳轉到指定頁面
-( void )alertView:( UIAlertView *)alertView clickedButtonAtIndex:( NSInteger )buttonIndex
{
    if (buttonIndex == 1 ) {
        // 軟體需要更新提醒
        if (alertView. tag == kVersionNeedUpdateAlertTag ) {
            NSURL *url = [ NSURL URLWithString :[ NSString stringWithFormat : @"https://itunes.apple.com/cn/app/wan-zhuan-quan-cheng/id%@?mt=8" , iFeverAPPID ]];             [[UIApplicationsharedApplication]openURL:url];                     }
    } }