Apple Game Frameworks and Technologies

Modify the GameScene Class to Handle Paid Continues

Similar to how you added the numberOfFreeContinues property in ​Save and Load the Number of Continues​, you need to add a property to track the number of paid continues; one that uses a custom getter and setter.

Open the GameScene.swift file, and below the code that adds the numberOfFreeContinues property, add the following code:

var numberOfPaidContinues: Int {
  get {
    var qty: Int = 0
    for product in GameData.shared.products {
      if product.id.contains("continue") {
        qty += product.quantity
      }
    }
    return qty
  }

  set(newValue) {
    let product = GameData.shared.products.filter(
    {$0.id.contains("continue")}).first
 product?.quantity = newValue ...