我写的代码

             //图片名              NSData *nameDate = [@"61DD9人像__昵称__图片名21212122121.jpg
" dataUsingEncoding:kCFStringEncodingUTF8];             [asyncsocket writeData:nameDate withTimeout:-1 tag:0];                          //图片长度             uint64_t length =(uint64_t) imageData.length;             length = CFSwapInt64HostToBig(length);             NSData *lengthdata = [NSData dataWithBytes:&length length:8];             [asyncsocket writeData:lengthdata withTimeout:-1 tag:0];              //图片             [asyncsocket writeData:imageData withTimeout:-1 tag:0];