How to make an iMessage app that only shows the current message?

Question

I am making a iMessage game. I want only the current iMessage session to show and all of the previous ones to be minimized. For a turn based game I don't want users to go back and see all the previous moves.

How might this be done with iOS 10 and Swift?

Answer 1

You want to use a single MSSession across all the messages in the conversation.

1. The session variable (declared in the main class)

class MessagesViewController: MSMessagesAppViewController {
    var session: MSSession?

    ...
}

2. Setting the session (when the app becomes active)

override func willBecomeActive(with conversation: MSConversation) {
    if let selected = conversation.selectedMessage {
        session = selected.session
    }
}

3. Use the session (when building the MSMessage)

if session == nil {
    session = MSSession()
}

let message = MSMessage(session: session!)

Full Code Example

class MessagesViewController: MSMessagesAppViewController {
    var session: MSSession?

    override func willBecomeActive(with conversation: MSConversation) {
        if let selected = conversation.selectedMessage {
            session = selected.session
        }
    }

    func buildMessage() {
        if session == nil {
            session = MSSession()
        }

        let message = MSMessage(session: session!)

        ...
    }
}