// create a singleton and remember to set your app id
let agora = AgoraManager.shared
agora.appId = "yourAppId"

// call joinChannel to support people talk with microphone
agora.joinChannel(token: String, channelId: String, info: String? = nil, uid: UInt64, completion: (()->Void)? = nil)

// call leaveChannel to exit current channel
agora.leaveChannel()

// switch about microphone and listen remote audio voice
agora.changeMicrophone(true)
agora.listenAllRemoteAudioStreams(true)

// who is speaking
agora.speaking = { uid, volume in
    // the one(uid) speaking 
}