AsyncSocket 使用

　　今天使用AsyncSocket模拟及时通信，在这里记录一下，免得以后自己又犯相同的错误

　　1>创建客户端和服务器socket

 /**
  *  设置socket
  */
 - (void)setupSocket
 {
     //1.客户端socket
     _clientSocket = [[AsyncSocket alloc] initWithDelegate:self];
     //2. 启用定时器连接服务器

     [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(tryToConnect:) userInfo:nil repeats:YES];

     //3.实例化服务器
     _serverSocket = [[AsyncSocket alloc] initWithDelegate:self];

     [_serverSocket acceptOnPort: error:nil];
 }

　　定时器代码：

 - (void)tryToConnect:(NSTimer *)timer
 {
     if ([_clientSocket isConnected]) {
         [timer invalidate];
         return;
     }
     NSString *host = @"10.0.185.132";
     UInt16 port = ;
     [_clientSocket connectToHost:host onPort:port withTimeout:- error:nil];
 }

　　2>实现协议回调方法

 #pragma mark - socket协议

 - (void)onSocket:(AsyncSocket *)sock didAcceptNewSocket:(AsyncSocket *)newSocket
 {
     NSLog(@"接收到新的socket连接");
     [_connectArray addObject:newSocket];
     [newSocket readDataWithTimeout:- tag:];
 }
 /*
  * 客户端连接服务器失败时的回调
  */
 - (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err
 {
     NSLog(@"客户端连接失败，错误信息：%@", [err localizedDescription]);
 }

 /*
  * 客户端连接服务器成功时的回调
  */
 - (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
 {
     NSLog(@"客户端连接成功：host:%@ port :%d", host, port);
 }

 //接收客户端发送过来的数据

 - (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
 {
     NSString *message =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

     [self sendMessage:message messageType:MessageTypeOther];

     //特别注意这句话一定要写，不然只会读取第一条数据，写这句话表示不停的等待读取数据
     [sock readDataWithTimeout:- tag:];
 }

　　3>发送信息

 NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];

     //发送消息
     if ([_clientSocket isConnected]) {
         [_clientSocket writeData:data withTimeout: tag:];

     }else{
         NSLog(@"连接断开");
         //尝试重新连接
         [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(tryToConnect:) userInfo:nil repeats:YES];
     }