Enumeration members
CONNECTION_STATE_CONNECTED
CONNECTION_STATE_CONNECTED: = 3
CONNECTION_STATE_CONNECTING
CONNECTION_STATE_CONNECTING: = 2
CONNECTION_STATE_DISCONNECTED
CONNECTION_STATE_DISCONNECTED: = 1
CONNECTION_STATE_FAILED
CONNECTION_STATE_FAILED: = 5
CONNECTION_STATE_RECONNECTING
CONNECTION_STATE_RECONNECTING: = 4
当前房间的连接状态