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

Rea Rahhal
PLUS
Rea Rahhal
Courses Plus Student 4,732 Points
Posted by Rea Rahhal
Rea Rahhal
Courses Plus Student 4,732 Points

Use of unresolved identifier FoodVendingMachine. I followed all the steps .don't know what's wrong

let vendingMachine:VendingMachine

required init?(coder aDecoder: NSCoder) {
    do{

        let dictionary = try PListConverter.dictionary(fromFile: "VendingInventory", ofType: "plist")

        let inventory = try InventoryUnarchiver.vendingInventory(fromDictionary: dictionary)
        self.vendingMachine = FoodVendingMachine(inventory:inventory)

    }catch let error{
        fatalError("\(error)")
    }
    super.init(coder: aDecoder)
}
Taylor Smith
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Taylor Smith
iOS Development Techdegree Graduate 14,153 Points
Taylor Smith
.a{fill-rule:evenodd;}techdegree seal-36
Taylor Smith
iOS Development Techdegree Graduate 14,153 Points

Hi Rea! So this error means it's not seeing your FoodVendingMachine object. This could be because of a typo, or maybe you named it something else by accident. Can you upload you FoodVendingMachine object code so I can see it?

Rea Rahhal
Rea Rahhal
Courses Plus Student 4,732 Points
Rea Rahhal
Rea Rahhal
Courses Plus Student 4,732 Points

Here is VendingMachine.swift

import Foundation enum VendingSelection: String{ case soda case dietSoda case chips case cookie case sandwich case wrap case candyBar case popTart case water case fruitJuice case sportsDrink case gum

}

protocol VendingItem{ var price:Double {get} var quantity: Int{get set} } protocol VendingMachine{ var selection:[VendingSelection]{get} var inventory:[VendingSelection:VendingItem]{get set} var amountDeposited:Double {get set} init(inventory:[VendingSelection:VendingItem])

func vend(_ quantity:Int,_ selection:VendingSelection) throws

func deposit(_ amount:Double)

}

struct Item:VendingItem{ let price: Double var quantity: Int } enum InventoryError:Error{ case invalidResource case conversionFailure case invalidSelection } class PListConverter{ static func dictionary(fromFile name: String, ofType type: String) throws ->[String:AnyObject]{

    guard let path = Bundle.main.path(forResource: name, ofType: type)else {
        throw InventoryError.invalidResource
    }
    guard let dictionary = NSDictionary(contentsOfFile: path) as? [String:AnyObject] else{

        throw InventoryError.conversionFailure
    }
    return dictionary
}

} class InventoryUnarchiver{ static func vendingInventory(fromDictionary dictionary:[String: AnyObject]) throws ->[VendingSelection:VendingItem]{ var inventory:[VendingSelection:VendingItem]=[:]

    for(key,value) in dictionary{
        if let itemDictionary = value as? [String:Any],let price = itemDictionary["price"] as? Double ,let quantity = itemDictionary["quantity"] as? Int{


    let item = Item(price: price, quantity: quantity)
            guard let selection = VendingSelection(rawValue:key)else{


                throw InventoryError.invalidSelection
            }
            inventory.updateValue(item, forKey: selection)
    }
}

    return inventory

} class FoodVendingMachine:VendingMachine{

func vend(_ quantity: Int, _ selection: VendingSelection) throws {
}

func deposit(_ amount: Double) {
}

let selection:[VendingSelection]=[.soda, .dietSoda, .chips, .cookie, .sandwich, .candyBar, .popTart, .water,.wrap, .fruitJuice,.sportsDrink, .gum, .wrap]//read only property var inventory:[VendingSelection:VendingItem] var amountDeposited = 10.0 required init(inventory: [VendingSelection : VendingItem]) { self.inventory = inventory } } }