- (id) requestWithURL:(NSURL *)urlWithString parameterWithString:(NSString *)parameterWithString didFailWithError:(NSError **)didFailWithError
{
    // URLRequest
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:urlWithString];
    // set header XML
    [request setValue:@"application/xml" forHTTPHeaderField:@"Content-type"];
    // set POST
    [request setHTTPMethod:@"POST"];
    // set XML to body
    [request setHTTPBody:[parameterWithString dataUsingEncoding:NSUTF8StringEncoding]];
    // response（結果）
    NSHTTPURLResponse *response = nil;
    // error
    NSError *error = nil;
 
    // 戻り値, 送信
    NSData *data = [NSURLConnection sendSynchronousRequest:request
                                         returningResponse:&response
                                                     error:&error];
 
    // error
    if (error)
    {
        data = nil;
        NSString *errorMessage = [NSString stringWithFormat:@"サーバ通信エラー {%ld}", (long)error.code];
 
        NSDictionary *info = nil;
        if (error.localizedDescription == nil) {
            info = @{NSLocalizedDescriptionKey: errorMessage};
        } else {
            info = @{NSLocalizedDescriptionKey: errorMessage,
                     NSLocalizedRecoverySuggestionErrorKey: error.localizedDescription};
        }
 
        *didFailWithError = [[NSError alloc] initWithDomain:@"com.example.applicationname" code:123 userInfo:info];
    }
 
    return data;
}

- (id) requestWithURL:(NSURL *)urlWithString parameterWithString:(NSString *)parameterWithString didFailWithError:(NSError **)didFailWithError { // URLRequest NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:urlWithString]; // set header XML [request setValue:@"application/xml" forHTTPHeaderField:@"Content-type"]; // set POST [request setHTTPMethod:@"POST"]; // set XML to body [request setHTTPBody:[parameterWithString dataUsingEncoding:NSUTF8StringEncoding]]; // response（結果） NSHTTPURLResponse *response = nil; // error NSError *error = nil; // 戻り値, 送信 NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; // error if (error) { data = nil; NSString *errorMessage = [NSString stringWithFormat:@"サーバ通信エラー {%ld}", (long)error.code]; NSDictionary *info = nil; if (error.localizedDescription == nil) { info = @{NSLocalizedDescriptionKey: errorMessage}; } else { info = @{NSLocalizedDescriptionKey: errorMessage, NSLocalizedRecoverySuggestionErrorKey: error.localizedDescription}; } *didFailWithError = [[NSError alloc] initWithDomain:@"com.example.applicationname" code:123 userInfo:info]; } return data; }