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:8888 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 = 8080;
    [_clientSocket connectToHost:host onPort:port withTimeout:-1 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:-1 tag:300];
}
/*
 * 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:-1 tag:300];
}

　　3>发送信息

NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];
    
    //发送消息
    if ([_clientSocket isConnected]) {
        [_clientSocket writeData:data withTimeout:60 tag:100];
        
    }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];
    }