Audio Chat Room (iOS)

Last updated: 2021-08-30 14:31:50

    Demonstration

    You can download and install the demo we provide to try out TRTC’s audio chat room features, including seat management, low-latency audio interaction, text chat, etc.

    To quickly implement the audio chat room feature, you can modify the demo we provide and adapt it to your needs. You can also use the TRTCVoiceRoom component and customize your own UI.

    Using the Demo UI

    Step 1. Create an application

    1. Log in to the TRTC console and select Development Assistance > Demo Quick Run.
    2. Enter an application name such as TestVoiceRoom and click Create.
    Note:

    This feature uses two basic PaaS services of Tencent Cloud, namely TRTC and IM. When you activate TRTC, IM will be activated automatically. IM is a value-added service. See Value-added Service Pricing for its billing details.

    Step 2. Download the SDK and demo source code

    1. Download the SDK and demo source code for your platform.
    2. Click Next.

    Step 3. Configure demo project files

    1. In the Modify Configuration step, select the development platform in line with the source package downloaded.

    2. Find and open the iOS/TRTCScenesDemo/TXLiteAVDemo/Debug/GenerateTestUserSig.h file.

    3. Set parameters in GenerateTestUserSig.h:

      • SDKAPPID: 0 by default. Set it to the actual SDKAppID.
      • SECRETKEY: an empty string by default. Set it to the actual key.
    4. Click Next to complete the creation.

    5. After compilation, click Return to Overview Page.

    Note:

    The method for generating UserSig described in this document involves configuring SECRETKEY in client code. In this method, SECRETKEY may be easily decompiled and reversed, and if your key is leaked, attackers can steal your Tencent Cloud traffic. Therefore, this method is only suitable for the local execution and debugging of the demo.
    The correct UserSig distribution method is to integrate the calculation code of UserSig into your server and provide an application-oriented API. When UserSig is needed, your application can send a request to the business server for a dynamic UserSig. For more information, see How do I calculate UserSig on the server?.

    Step 4. Run the demo

    Use Xcode (version 11.0 or above) to open the iOS/TRTCScenesDemo/TXLiteAVDemo.xcworkspace project and click Run.

    Step 5. Modify the demo source code

    The TRTCVoiceRoomDemo folder in the source code contains two subfolders: ui and model. The ui subfolder contains UI code and UI-related logic. The table below lists the Swift files (folders) and the UI views they represent. You can refer to it when making UI changes.

    File or Folder Description
    TRTCVoiceRoomEnteryController The initialization method for all view controllers. You can use the instance to quickly get a ViewController object.
    NetworkRoomManager Logic for interactions with the business backend
    TRTCCreateVoiceRoomViewController Logic for the room creation view
    TRTCVoiceRoomListViewController Logic for the room list view
    TRTCVoiceRoomViewController Logic for the main room views for room owners and listeners

    Each TRTC'XXXX'ViewController folder contains ViewController, RootView, and ViewModel, whose use is described below.

    File Description
    ViewController Page controller, which is responsible for routing pages and binding RootView and ViewModel
    RootView Layout of all views
    ViewModel View controller, which is responsible for responding to users’ interactions with views and returning response status

    Customizing UI

    The TRTCVoiceRoomDemo folder in the source code contains two subfolders: ui and model. The model folder contains the reusable open-source component TRTCVoiceRoom. You can find the component’s APIs in TRTCVoiceRoom.swift and use them to customize your own UI.

    Step 1. Integrate the SDKs

    The audio chat room component TRTCVoiceRoom depends on the TRTC SDK and IM SDK. Follow the steps below to integrate the two SDKs into your project.

    Method 1: adding dependencies via CocoaPods

    pod 'TXIMSDK_iOS'
    pod 'TXLiteAVSDK_TRTC'
    
    Note:

    You can view the latest version numbers of the two SDKs by visiting their GitHub pages at TRTC and IM.

    Method 2: adding dependencies through local files
    If your access to the CocoaPods repository is slow, you can download the ZIP files of the SDKs and manually integrate them into your project as instructed in the documents below.

    SDK Download Page Integration Guide
    TRTC SDK Download Integration document
    IM SDK Download Integration document

    Step 2. Configure permission requests

    Configure the mic permission request by adding Privacy > Microphone Usage Description in info.plist.

    Step 3. Import the TRTCVoiceRoom component

    Copy all files in iOS/TRTCScenesDemo/TXLiteAVDemo/TRTCVoiceRoomDemo/model to your project.

    Step 4. Create an instance and log in

    1. Call the sharedInstance class method of TRTCVoiceRoom to create an instance that complies with TRTCVoiceRoom’s protocol, or call the shared class method to get a TRTCVoiceRoomImp instance. There is no difference between the two methods with respect to API usage.
    2. Call the setDelegate function to register event callbacks of the component.
    3. Call the login function to log in to the component. Set the key parameters as described below.
      ParameterDescription
      SDKAppID You can view the `SDKAppID` of your application in the TRTC console.
      userId ID of the current user, which is a string that can contain letters (a-z and A-Z), digits (0-9), hyphens (-), and underscores (_).
      userSig Tencent Cloud's proprietary security signature. To obtain one, see UserSig.
      callback Login callback. The code is 0 if login is successful.
      // Swift example
      // The class responsible for business logic in your code
      class YourController {
      // Calculate attributes to get a singleton object
      var voiceRoom: TRTCVoiceRoomImp {
      return TRTCVoiceRoomImp.shared()
      }

      // Other code logic
      ......
      }
      // Set a `voiceroom` delegate
      self.vocieRoom. setDelegate(delegate: voiceRoomDelegate)

      // Below is the calling method. We recommend you use `weak self` in the closure to prevent circular references. The `weak self` part is not included in the sample code below.
      self.vocieRoom.login(sdkAppId: sdkAppID, userId: userId, userSig: userSig) { [weak self] (code, message) in
      guard let `self` = self else { return }
      // Your callback business logic
      }

    Step 5. Create a room and become a speaker

    1. After performing step 4 to log in, call setSelfProfile to set your nickname and profile photo.
    2. Call createRoom to create an audio chat room, passing in room-related parameters such as room ID, whether to request your consent for listeners to speak, the number of seats, etc.
    3. After creating the room, call enterSeat to take a seat.
    4. You will receive an onSeatListChanget notification about the change of the seat list, and can update the change to the UI.
    5. You will also receive an onAnchorEnterSeat notification about the occupation of a seat, and mic capturing will be enabled automatically.

    Sample code:

    // 1. Set your nickname and profile photo
    self.voiceRoom.setSelfProfile(userName: userName, avatarUrl: avatarURL) { (code, message) in
      // Result callback           
    }
    
    // 2. Create a room
    let param = VoiceRoomParam.init()
    param.roomName = "Room ID"
    param.needRequest = true // Whether your consent is required for listeners to speak
    param.coverUrl = "Cover URL"
    param.seatCount = 7 // Number of room seats. In this example, the number is 7. 6 seats are available after you take one.
    param.seatInfoList = []
    for _ in 0..<param.seatCount {
      let seatInfo = VoiceRoomSeatInfo.init()
      param.seatInfoList.append(seatInfo)
    }
    self.voiceRoom.createRoom(roomID: yourRoomID, roomParam: param) { (code, message) in
      guard code == 0 else { reutrn }
      // Take a seat after creating the room
      self.voiceRoom.enterSeat(seatIndex: 0) { [weak self] (code, message) in
          guard let `self` = self else { return }
          if code == 0 {
              // Seat taken successfully
          } else {
              // Failed to take a seat
          }
      }
    }
    
    // 3. After taking a seat, you receive an `onSeatListChange` notification
    func onSeatListChange(seatInfoList: [VoiceRoomSeatInfo]) {
      // Refresh your seat list
    }
    
    // 4. You receive an `onAnchorEnterSeat` notification
    func onAnchorEnterSeat(index: Int, user: VoiceRoomUserInfo) {
      // Handle the seat taking event
    }
    

    Step 6. Enter a room as a listener

    1. After performing step 4 to log in, call setSelfProfile to set your nickname and profile photo.
    2. Get the latest audio chat room list from the backend.
      Note:

      The audio chat room list in the demo is for demonstration only. The logic of audio chat room lists varies significantly. Tencent Cloud does not provide list management services for the time being. Please manage the list by yourself.

    3. Call getRoomInfoList to get short descriptions of the rooms, which are provided by the room owner during room creation via the calling of createRoom.
      Note:

      If your audio chat room list already displays enough room information, you can skip the step of calling getRoomInfoList.

    4. Select an audio chat room, and call enterRoom with the room ID passed in to enter the room.
    5. After entering the room, you will receive an onRoomInfoChange notification about room change from the component. Record the room information, including room name, whether the room owner’s consent is required for listeners to speak, etc., and update it to the UI.
    6. You will receive an onSeatListChange notification about seat change from the component. Update the change to the UI.
    7. You will also receive an onAnchorEnterSeat notification about the occupation of a seat.

    // 1. Set your nickname and profile photo
    self.voiceRoom.setSelfProfile(userName: userName, avatarUrl: avatarURL) { (code, message) in
    // Result callback
    }

    // 2. Get the room list from the backend. Suppose it is `roomList`.
    let roomList: [Int] = getRoomIDList() // The function you use to get the list of room IDs

    // 3. Call `getRoomInfoList` to get details of the rooms
    self.voiceRoom.getRoomInfoList(roomIdList: roomIdsInt) { (code, message, roomInfos: [VoiceRoomInfo]) in
    // Refresh the UI after getting the result
    }

    // 4. Select an audio chat room, and pass in the `roomId` to enter it
    self.voiceRoom.enterRoom(roomID: roomInfo.roomID) { (code, message) in
    // Callback of the room entry result
    if code == 0 {
    // Entered room
    }
    }

    // 5. After entering the room, you receive an `onRoomInfoChange` notification
    func onRoomInfoChange(roomInfo: VoiceRoomInfo) {
    // Update the room name and other information
    }

    // 6. You receive an `onSeatListChange` notification
    func onSeatListChange(seatInfoList: [VoiceRoomSeatInfo]) {
    // Refresh the seat list
    }

    // 7. You receive an `onAnchorEnterSeat` notification
    func onAnchorEnterSeat(index: Int, user: VoiceRoomUserInfo) {
    // Handle the seat taking event
    }

    Step 7. Manage seats

    1. A room owner can put a listener in a seat by passing in the userId of the listener and the seat number to pickSeat. All members in the room will receive an onSeatListChange notification and an onAnchorEnterSeat notification.
    2. A room owner can remove a speaker from a seat by passing in the seat number to kickSeat. All members in the room will receive an onSeatListChange notification and an onAnchorLeaveSeat notification.
    3. A room owner can mute or unmute a seat by passing in the seat number to muteSeat. All members in the room will receive an onSeatListChange notification and an onSeatMute notification.
    4. A room owner can block or unblock a seat by passing in the seat number to closeSeat. Listeners cannot take a blocked seat, and all members in the room will receive an onSeatListChange notification and an onSeatClose notification.

    Step 8. Use signaling for invitations

    In seat management, listeners can take and leave seats without the room owner’s consent, and the room owner can put listeners in seats without the listeners’ consent.
    If you want listeners and room owners to obtain each other’s consent before performing the above actions in your application, you can use signaling for invitation sending.

    1. A listener calls sendInvitation, passing in information including the room owner’s userId and custom command words. The API will return an inviteId, which should be recorded.
    2. The room owner receives an onReceiveNewInvitation notification, and a window pops up on the UI asking the room owner whether to accept the request.
    3. The room owner calls acceptInvitation with the inviteId passed in to accept the request.
    4. The listener receives an onInviteeAccepted notification and calls enterSeat to take a seat.

    // Listener
    // 1. Call sendInvitation to request to take seat 1
    let inviteId = self.voiceRoom.sendInvitation(cmd: "ENTER_SEAT", userId: ownerUserId, content: "1") { (code, message) in
    // Callback of the request sending result
    }
    // 2. Take the seat when the request is accepted by the room owner
    func onInviteeAccepted(identifier: String, invitee: String) {
    if identifier == selfID {
    self.voiceRoom.enterSeat(seatIndex: ) { (code, message) in
    // Callback of the seat taking result
    }
    }
    }

    // Room owner
    // 1. Receive the request
    func onReceiveNewInvitation(identifier: String, inviter: String, cmd: String, content: String) {
    if cmd == "ENTER_SEAT" {
    // 2. Accept the request
    self.voiceRoom.acceptInvitation(identifier: identifier, callback: nil)
    }
    }

    Step 9. Enable text chat and on-screen comments

    • Call sendRoomTextMsg to send common text messages. All users in the room will receive an onRecvRoomTextMsg callback.
      IM has its default content moderation rules. Text messages that contain restricted terms will not be forwarded by the cloud.
      // Sender: send text messages
      self.voiceRoom.sendRoomTextMsg(message: message) { (code, message) in


      }
      // Recipient: listen for text messages
      func onRecvRoomTextMsg(message: String, userInfo: VoiceRoomUserInfo) {
      // Handling of the messages received
      }
    • Call sendRoomCustomMsg to send custom (signaling) messages. All users in the room will receive an onRecvRoomCustomMsg callback.
      Custom messages are often used to transfer custom signals, e.g., giving and broadcasting likes.
      // For example, a sender can customize commands to distinguish on-screen comments and likes
      // For example, use "CMD_DANMU" to indicate on-screen comments and "CMD_LIKE" to indicate likes
      self.vocieRoom.sendRoomCustomMsg(cmd: “CMD_DANMU”, message: "hello world", callback: nil)
      self.voiceRoom.sendRoomCustomMsg(cmd: "CMD_LIKE", message: "", callback: nil)
      // Recipient: listen for custom messages
      func onRecvRoomCustomMsg(cmd: String, message: String, userInfo: VoiceRoomUserInfo) {
      if cmd == "CMD_DANMU" {
      // Receive an on-screen comment
      }
      if cmd == "CMD_LIKE" {
      // Receive a like
      }
      }