打印服务器返回数据 NSURLConnectionDelegate

- (void)connectionDidFinishLoading:(NSURLConnection __unused *)connection 

{

    self.responseData = [self.outputStream propertyForKey:NSStreamDataWrittenToMemoryStreamKey];

    NSString *data = [[NSString alloc] initWithData:self.responseData encoding:NSASCIIStringEncoding];

    NSLog(@"%@", data);

    

    [self.outputStream close];

    [self finish];

     self.connection = nil;

}