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iOS Build a Vending Machine App in Swift 2.0 Loading Data From a Resource Finishing Touches

Austin Hawks
PLUS
Austin Hawks
Courses Plus Student 3,003 Points
Posted by Austin Hawks
Austin Hawks
Courses Plus Student 3,003 Points

I'm getting the error cannot call non function type 'module<VendingMachine>'. Please help

let vendingMachine: VendingMachineType
    required init?(coder aDecoder: NSCoder) {
        do {
            let dictionary = try plistCoverter.dictionaryFromFile("VendingInventory", oftype: "plist")
            let inventory = try InventoryUnarchiver.vendingInventoryFromDictionary(dictionary)
            self.vendingMachine = VendingMachine(inventory: inventory)
            //using self outside of a init method ?
        } catch let error { fatalError("\(error)") }

Here is the code and the error is on the self.vendingMachine = VendingMachine(inventory: inventory) line. And here's the protocol vendingMachine is assigned to:

protocol VendingMachineType {
    var selection: [VendingSelection] { get }
    var inventory: [VendingSelection: ItemType] { get set }
    init(inventory: [VendingSelection: ItemType])
    func vend(selection: VendingSelection, quantity: Double) throws
    func deposit(amount: Double)
}

1 Answer

Martin Wilter
seal-mask
.a{fill-rule:evenodd;}techdegree
Martin Wilter
iOS Development Techdegree Student 8,782 Points
Martin Wilter
.a{fill-rule:evenodd;}techdegree
Martin Wilter
iOS Development Techdegree Student 8,782 Points

Hi Austin,

Hopefully you've found the issue by now, but if not, here's my guess.

On the line with the error

self.vendingMachine = VendingMachine(inventory: inventory)

the compiler should call the init method of the VendingMachine class (in VendingMachine.swift). To illustrate we can write it like this:

self.vendingMachine = VendingMachine.init(inventory: inventory)

However, from the error message it seems the compiler does not recognize the VendingMachine class.

To check if this actually is the case you can option-click on VendingMachine on the line

self.vendingMachine = VendingMachine(inventory: inventory)

and then the pop-up should show you something like this:

Declaration    class VendingMachine : VendingMachineType
Declared In    VendingMachine.swift

If the pop-up doesn't show you that, then it's time to double check the VendingMachine class (in VendingMachine.swift) for typos etc.

Hope this helps.