问openweathermap与移动应用程序的问题

EN

NSURL *URL = [NSURL URLWithString:@"http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=b1b15e88fa797225412429c1c50c122a&lang=en-US"];
    NSURLRequest *request = [NSURLRequest requestWithURL:URL];

    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
    {
        NSError* errorObj;
        NSDictionary* json = [NSJSONSerialization
                              JSONObjectWithData:data
                              options:kNilOptions
                              error:&errorObj];

        NSLog(@" response is %@",json);

    }];

    [task resume];