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iOS Build a Vending Machine App in Swift Loading Data From a Resource Finishing Touches

Matthew Ingram
PLUS
Matthew Ingram
Courses Plus Student 4,718 Points
Posted by Matthew Ingram
Matthew Ingram
Courses Plus Student 4,718 Points

it isn't printing the inventory

let vendingMachine: VendingMachine var currentSelection: VendingSelection? var quantity = 1

required init?(coder aDecoder: NSCoder) {
    do {
        let dictionary = try PlistConverter.dictionary(fromFile: "VendingInventory", ofType: "plist")
        let inventory = try InventoryUnarchiver.vendingInvendory(fromDictionary: dictionary)
        self.vendingMachine = FoodVendingMachine(inventory: inventory)
    } catch let error {
        fatalError("\(error)")
    }

    super.init(coder: aDecoder)
}


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    setupCollectionViewCells()

print(vendingMachine.inventory)

}

when I got to the console to see the inventory all I see is an empty dictionary [:]

Daniel Santos
Daniel Santos
34,969 Points

I don't think this is the problem because you would have a compiler error, but let inventory = try InventoryUnarchiver.vendingInvendory(fromDictionary: dictionary) has a typo. vendingInvendory

1 Answer

Leon Silcott
Leon Silcott
27,583 Points
Leon Silcott
Leon Silcott
27,583 Points

Hey, I'm not sure if you figured out how to solve this yet, but I was experiencing the same issue. I fixed it by ensuring I used the correct spelling in the if let statement in InventoryUnarchiver function.

if let itemDictionary = value as? [String: Any], let price = itemDictionary["price"] as? Double, let quantity = itemDictionary["quantity"] as? Int{
...
}

Initially I was using itemDictionary["quatity"] instead of itemDictionary["quantity"], it could not find the information needed to satisfy the if let and VendingItem protocol.

NOTE: I used a print statement in the PlistConverter before the return statement to ensure the dictionary is being populated. print(dictionary)

Hope this helps!