提高代码质量的几个方法！52个，先罗列几个自己看

enum EOCConnectionState {
     EOCConnectionStateDisconnected,
     EOCConnectionStateConnecting,
     EOCConnectionStateConnected,
};

编译器会为每个枚举值分配一个独有的编号，从0开始，依次加1。一个字节最多可表示0~255共256种(2^8)枚举变量。

switch (_currentState) {
    EOCConnectionStateDisconnected:
      //...
      break;
    EOCConnectionStateConnecting:
      //...
      break;
    EOCConnectionStateConnected:
      //...
      break;
}