iOS获取当前AppStore版本号与更新

- (void)checkUpdateWithAppID:(NSString *)appID success:(void (^)(NSDictionary *resultDic , BOOL isNewVersion ,NSString * newVersion , NSString * currentVersion))success failure:(void (^)(NSError *error))failure{
    AFHTTPSessionManager *manager = [AFHTTPSessionManagermanager];
    manager.requestSerializer=[AFHTTPRequestSerializerserializer];
    manager.responseSerializer=[AFHTTPResponseSerializerserializer];

    //
    NSString *encodingUrl=[[@"http://itunes.apple.com/lookup?id=" stringByAppendingString:@"APP的唯一ID"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    
    [manager GET:encodingUrl parameters:nilprogress:^(NSProgress *_Nonnull downloadProgress) {
        
    } success:^(NSURLSessionDataTask *_Nonnull task, id _Nullable responseObject) {
        
        NSDictionary *resultDic=[NSJSONSerializationJSONObjectWithData:responseObject options:NSJSONReadingMutableLeaveserror:nil];
 
//获取AppStore的版本号
        NSString * versionStr =[[[resultDic objectForKey:@"results"]objectAtIndex:0]valueForKey:@"version"];
        
        NSString *versionStr_int=[versionStr stringByReplacingOccurrencesOfString:@"."withString:@""];

        int version=[versionStr_intintValue];
        
//获取本地的版本号
        NSDictionary *infoDic=[[NSBundle mainBundle] infoDictionary];
        
        NSString * currentVersion = [infoDic valueForKey:@"CFBundleShortVersionString"];
        
        NSString *currentVersion_int=[currentVersion stringByReplacingOccurrencesOfString:@"."withString:@""];
        
        int current=[currentVersion_int intValue];
        
        if(version>current){
            success(resultDic,YES, versionStr,currentVersion);
        }else{
            success(resultDic,NO ,versionStr,currentVersion);
        }
    } failure:^(NSURLSessionDataTask *_Nullable task, NSError *_Nonnull error) {
        failure(error);
    }];
}


//  调用


VersionUpdate *tool=[[VersionUpdatealloc]init];
    __weaktypeof(self)weakSelf=self;
    [tool checkUpdateWithAppID:@""success:^(NSDictionary *resultDic,BOOL isNewVersion, NSString *newVersion , NSString * currentVersion) {
        if (isNewVersion) {//表示要更新版本
            NSMutableDictionary *dict=[[NSMutableDictionary alloc]init];
            NSString *key=[NSString stringWithFormat:@"%@%@",currentVersion,newVersion];
            NSString *value=[s.versionUpdateMessage objectForKey:key];
            int time =[value intValue];
            if (time<3&&_versionUpdateVC==nil) {//小于三次可以继续弹框
                time+=1;
                [dict setValue:[NSString stringWithFormat:@"%d",time]forKey:key];
                s.versionUpdateMessage=[NSDictionary dictionaryWithDictionary:dict];
                _versionUpdateVC = [[VersionUpdateController alloc]initWithContent:[[[resultDic objectForKey:@"results"]firstObject]objectForKey:@"releaseNotes"]];//releaseNotes,AppStore上面的APP更新内容
                [_versionUpdateVC addSelfFromSuperWithVersionStr:newVersion];
            }else{//大于三次不做任何操作
                [weakSelf joinGroupView];
            }
        }
    } failure:^(NSError *error) {
        [weakSelf joinGroupView];
    }];