网络连接状态类型

typedef NS_ENUM(NSInteger, ARConnectionStateType) {
    /**
     1:网络连接断开
     */
    ARConnectionStateDisconnected = 1,
    /**
     2:建立网络连接中
     */
    ARConnectionStateConnecting = 2,
    /**
     3:网络已连接
     */
    ARConnectionStateConnected = 3,
    /**
     4:重新建立网络连接中
     */
    ARConnectionStateReconnecting = 4,
    /**
     5:网络连接失败
     */
    ARConnectionStateFailed = 5
};