我需要在iOS应用程序和Java套接字服务器之间实现简单的套接字通信（字符串）。我设法将两者连接起来，但是我无法发送任何消息。Java服务器是从该示例中获取的，这是我的代码的一部分，在该代码中我建立连接并（尝试）向服务器发送消息：
- (void)initNetworkCommunication {
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"192.168.0.10", 2004, &readStream, &writeStream);
self.inputStream = objc_unretainedObject(readStream);
self.outputStream = objc_unretainedObject(writeStream);
[self.inputStream setDelegate:self];
[self.outputStream setDelegate:self];
[self.inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[self.outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[self.inputStream open];
[self.outputStream open];
}
- (void)sendMessage {
NSString *response = [NSString stringWithFormat:@"aaa"];
NSData *data = [[NSData alloc] initWithData:[response dataUsingEncoding:NSASCIIStringEncoding]];
[self.outputStream write:[data bytes] maxLength:[data length]];
}
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
NSLog(@"stream event %i", streamEvent);
switch (streamEvent) {
case NSStreamEventOpenCompleted:
NSLog(@"Stream opened");
break;
case NSStreamEventHasBytesAvailable:
if (theStream …