往php的服务器发送“username”并接收返回的数据
str_post = @"username";
NSString *ipdk = [[NSString alloc]initWithFormat:@"http://192.168.1.104/post_android_data.php"];
NSURL *url = [NSURL URLWithString:ipdk];

NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:@"%d", [str_post length]];
[req addValue:@"application/x-www-form-urlencoded"forHTTPHeaderField:@"Content-Type"];
[req addValue:msgLength forHTTPHeaderField:@"Content-Length"];
[req setHTTPMethod:@"POST"];
[req setHTTPBody: [str_post dataUsingEncoding:NSUTF8StringEncoding]];

conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];

NSLog(@"conn%@",conn);

if (conn) {
webData = [NSMutableData data];
NSLog(@"webdata-----%@",webData);
}

// 执行请求
NSData *data = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:nil];
// 输出返回数据
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"-----%@",returnString);

接收的返回数据为空什么都没有，我怀疑是根本就没有把username发到服务器上，请问这个怎么解决
[最优解释]
no problems~！
[其他解释]
自己顶一下，在线等
[其他解释]
怎么还没有人来回答这个问题
[其他解释]
哈哈哈哈哈哈哈哈