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Jatinder Singh Saini
iOS Development Techdegree Student 1,317 PointsI always get error message Type 'VendingMachine' does not conform to protocol 'VendingMachineType'
// // VendingMachine.swift // VendingMachine // // Created by Jatinder Singh Saini on 15/06/16. // Copyright © 2016 Treehouse. All rights reserved. //
import Foundation
protocol VendingMachineType { var selection : [VendingSelection] { get } var inventory : [VendingSelection : ItemType] { get set } var amountdeposited: Double { get set }
init(inventory :[VendingSelection : ItemType])
func vend(selection: VendingSelection, quantity :Double ) throws
func deposit(amount : Double)
}
protocol ItemType { var price :Double { get} var quantity : Double { get set}
}
enum InventoryError :ErrorType {
case InvalidResource
case ConversionError
case InvalidKey
}
class PlistConverter { class func dictionayFromfile(resource: String, OfType type: String ) throws -> [String :AnyObject] { guard let path = NSBundle.mainBundle().pathForResource(resource, ofType: type)else { throw InventoryError.InvalidResource
}
guard let dictionary = NSDictionary(contentsOfFile: path),let castDictionary = dictionary as? [String:AnyObject] else {
throw InventoryError.ConversionError
}
return castDictionary
}
} class InventoryUnarchiver{ class func vendingInventoryFromDictionary(dictionary: [String : AnyObject]) throws -> [VendingSelection:ItemType]{
var inventory: [VendingSelection : ItemType] = [:]
for (key,value) in dictionary {
if let itemDict = value as? [String :Double],
let price = itemDict["price"], let quantity = itemDict["quantity"] {
let item = VendingItem(price: price, quantity: quantity)
guard let key = VendingSelection(rawValue: key) else {
throw InventoryError.InvalidKey
}
inventory.updateValue(item, forKey: key)
}
}
return inventory
} } enum VendingSelection : String { case Tea case Coffee case Coke case Maggi case SamoseCholle case BillUnits case CandyBar case Holidays }
struct VendingItem : ItemType { let price : Double var quantity :Double }
class VendingMachine: VendingMachineType {
let selection: [VendingSelection] = [.Tea, .Coffee, .Coke, .Maggi, .SamoseCholle, .BillUnits, .CandyBar, .Holidays]
var inventory: [VendingSelection : ItemType]
var amountDeposited: Double = 100.0
required init(inventory : [VendingSelection :ItemType]) {
self.inventory = inventory
}
func vend(selection: VendingSelection, quantity: Double) throws {
}
func deposit(amount: Double) {
}
}
2 Answers
Mohamed Moukhtar
Courses Plus Student 6,151 PointsThe name of property "amount deposited" in the protocol declaration doesn't match the class declaration. You named it once (in the protocol) like this: "amountdeposited" while in the class declaration you named it like this: "amountDeposited". Use the same name and you are good to go.
Mohamed Moukhtar
Courses Plus Student 6,151 Pointsyou are welcome, I'm really glad I could help
Jatinder Singh Saini
iOS Development Techdegree Student 1,317 PointsJatinder Singh Saini
iOS Development Techdegree Student 1,317 Pointsits working now ! Thank you bro for helping me out