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Start your free trialCharlie O'Shea
18,737 PointsExtension Attempt: Display Available Stock
I thought it'd be a useful exercise to try and extend the vending machine by adding a label which displays the current stock for an item when selected, and decrements it when purchased. I've made a working implementation of it which I call during purchase() and didSelectItemAtIndexPath.
But I'm fairly sure that I've overcomplicated my code for something that should be relatively simple and I have had to resort to a ! when changing types within the function which I'd like help in getting rid of. Is there a more elegant solution?
func stockForCurrentSelection(selected: VendingSelection) -> String {
if let item = vendingMachine.inventory[selected],
let available: Double? = item.quantity {
let availableInt = Int(available!)
return String(availableInt)
}
print(String(vendingMachine.inventory[selected]!.quantity))
return "0"
}
@IBOutlet weak var availableLabel: UILabel!
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
updateCellBackgroundColor(indexPath, selected: true)
currentSelection = vendingMachine.selection[indexPath.row]
if let currentSelection = currentSelection {
availableLabel.text = stockForCurrentSelection(currentSelection)
}
reset()
}