iphone网络连接

 -(void)URLMessage { NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; [request setURL: url ]; NSString* filepath = [[NSString alloc] initWithFormat:@"%@/body.txt",[[NSBundle mainBundle] bundlePath]]; NSData *body = [NSData dataWithContentsOfFile:filepath]; [filepath release]; [request setHTTPBody: body]; [request setHTTPMethod: @"POST"]; [request setValue:@"Close" forHTTPHeaderField:@"Connection"]; [request setValue:@"www.baidu.com" forHTTPHeaderField:@"Host"]; [request setValue:@"688" forHTTPHeaderField:@"Content-Length"]; NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:true]; [urlConnection start]; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@"接收完响应:%@",response); } //接收到的数据主要是在这里处理 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"接收完数据:"); NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoy=[paths objectAtIndex:0]; NSString *filename=[documentsDirectoy stringByAppendingPathComponent:@"file.txt"]; [data writeToFile:filename atomically:NO]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"数据接收错误:%@",error); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"连接完成:%@",connection); }

 调用的时候先发送消息到URLMessage,然后在- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data这个方法里处理数据,我是直接写成了一个文件.