接 CocoaAsyncSocket 学习 （一）

实现自动逻辑回复功能

• 在 监听接入客户端的方法中 监听到接入后 写入客户端数据

- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket {
    NSLog(@"服务端  %@", sock);
    NSLog(@"客户端  %@", newSocket);
    [self.clientSockets addObject:newSocket];
    
    
    NSMutableString *mutableStr = [NSMutableString string];
    [mutableStr appendString:@"欢迎来到10086在线服务，请输入下面的数字选择服务\n"];
    [mutableStr appendString:@"[0]在线充值\n"];
    [mutableStr appendString:@"[1]在线投诉\n"];
    [mutableStr appendString:@"[2]优惠信息\n"];
    [mutableStr appendString:@"[3]special services\n"];
    
    [newSocket writeData:[mutableStr dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:0];
    
    // 监听客户端是否写入数据
    // timeOut: -1 暂时不需要 超时时间  tag暂时不需要 传0
    [newSocket readDataWithTimeout:-1 tag:0];
}

- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag {
    
    NSLog(@"客户端  %@", sock);
    NSString *dataStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"data --- %@", dataStr);
    
    
    NSInteger index = [dataStr integerValue];
    NSString *responseStr = nil;
    switch (index) {
        case 0:
            responseStr = @"充值服务暂停中...\n";
            break;
        case 1:
            responseStr = @"投诉服务暂停中...\n";
            break;
        case 2:
            responseStr = @"优惠信息没有...\n";
            break;
        case 3:
            responseStr = @"SB 怎么可能有特殊服务...\n";
            break;
        case 4:
            responseStr = @"退出成功...\n";
            break; 
      
        default:
            responseStr = @"指令无效...\n";
            break;
    }
    
#####退出连接的话  将客户端socket 从数组中移除即可
      if (index == 4) {
        [self.clientSockets removeObject:sock];
    }
    // 服务端接收到客户端发送的数据之后  返回数据给 客户端
    // 我们将接受到的数据返回回去
    [sock writeData:[responseStr dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:0];
    
    [sock readDataWithTimeout:-1 tag:0];
}