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iMessage game - send hidden value

I follow this tutorial to learn iMessage app.
Everything seems ok.

However, I want to develop a game like BattleShip kind of game.
That means I need to send in the value which is hidden from the other player.

How can I do that?

Solution

  • You could put the hidden parameters as part of the URL, like 

    message.url = URL(string: "http://battleship.example.com/?state=AAAAAA==")!

    Note that the URL cannot be more than 5000 characters long (i.e. at most about 3.5 KiB of data after base-64.)

    You may want to checkout the tutorial on https://www.shinobicontrols.com/blog/ios-10-day-by-day-day-1-messages.

    To prevent cheaters from easily modifying the URL parameters, you might want to encrypt and/or sign the URL parameters.