Raise Hand using PubSub - iOS

Let us see, how we can use PubSub to implement Raise Hand functionality. If you are not familiar with the PubSub mechanism and pubSub class, you can follow this guide.

Implementing Raise Hand

1. First step in raise hand is choosing the topic which all the participants will publish and subscribe to know some participant raise their hand. We will be using RAISE_HAND as the topic for this one.
2. On the raiseHand button, publish any message to that specific topic.

Swift

class MeetingViewController {
    //Button that will send the Raise Hand message when tapped
    @IBAction func raiseHandTapped(_ sender: Any) {
        // publish message
        self.meeting?.pubsub.publish(topic: "RAISE_HAND", message: "raise hand")
    }
}

3. Now let us show an alert to all the participants showing who raised the hand.

Swift

extension MeetingViewController: MeetingEventListener {
    func onMeetingJoined() {
    //subscribe to the topic 'CHAT' when onMeetingJoined is triggered
    meeting?.pubsub.subscribe(topic: "RAISE_HAND", forListener: self)
    }
}
extension MeetingViewController: PubSubMessageListener {
    // read message when it is received
    func onMessageReceived(_ message: PubSubMessage) {
        print(message.senderName, "just Raised the hand")
    }
}

API Reference

The API references for all the methods and events utilised in this guide are provided below.

• pubSub()