/**　　　　　　　　　　主要实现思路*  1.创建主机地址,设置端口号2.连接到主机3.将c语言输入输出流转化为oc语言并代理4.打开输入输出流，并加入消息循环池　　　　  最后个根据代理方法来监听输入输出流的变化即可　*///设置主机地址和端口号根据服务端所给端口号设置NSString *host = @"127.0.0.1";int port = 12345;//创建c语言输入输出流
    CFReadStreamRef readStream;CFWriteStreamRef writeStream;//链接至主机CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);//将c语言输入输出流转化为oc对象，此处用到定义好的OC全局变量_outputStream = (__bridge NSOutputStream *)writeStream;_inputStream = (__bridge NSInputStream *)readStream;//设置代理_outputStream.delegate = self;_inputStream.delegate = self;//打开输入输出流通道并监听
    [_outputStream open];[_inputStream open];//加入消息循环池，若不放入消息循环池不能做到监听
    [_outputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];[_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode {switch (eventCode) {case NSStreamEventOpenCompleted:
//            NSLog(@"%@",[aStream class]);NSLog(@"连接到主机完成");break;case NSStreamEventHasBytesAvailable:
//            NSLog(@"%@",[aStream class]);NSLog(@"有字节可读");　　　　　　　//读取对应的字节[self readData];break;case NSStreamEventHasSpaceAvailable:NSLog(@"%@",[aStream class]);NSLog(@"可发送字节");break;case NSStreamEventErrorOccurred:NSLog(@"链接错误");break;case NSStreamEventEndEncountered:NSLog(@"断开链接");//链接断开后需要关闭输出输出流通道并将其移出消息循环池
            [_outputStream close];[_inputStream close];[_outputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];[_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];break;default:break;}
}

    //输出数据,此处name需要匹配服务器端输入格式要求NSString *name = [@"iam:" stringByAppendingString:@"lisi"];//做出对应的转化 NSData *data = [name dataUsingEncoding:NSUTF8StringEncoding];//将数据输出
    [_outputStream write:data.bytes maxLength:data.length];//有输出后输入端会监听到接收了新的数据此处就可以直接读取
- (void)readData {//设置一个字符数组用于接收字符数据uint8_t buff[1024];//获取字符数据并得到其长度NSUInteger length = [_inputStream read:buff maxLength:sizeof(buff)];//将接收的字符数组转化为OC对象NSString *receving = [[NSString alloc] initWithBytes:buff length:length encoding:NSUTF8StringEncoding];NSLog(@"%@",receving);
}