Apple Game Frameworks and Technologies

Save and Load the Number of Continues

In Chapter 15, ​Adding More Scenes and Saving the Game​, you learned how to securely save and load game data by creating a custom GameData class. Rather than recreate the wheel, you’ll copy the resource file, GameData.swift, from the resources folder into the gloopdropproject. Note that this file is a bare-bones copy of what you made earlier.

Open Finder and drag the GameData.swift file into the Project Navigator; place it below the AdMobHelper.swift file.

Go back to Xcode, open the GameData.swift file, and below the line that reads // var propertyName: type = value, add the following:

var freeContinues: Int = 1 {
  didSet {
    saveDataWithFileName("gamedata.json")
  }
}

Here, you’re making sure ...