Implementation of Factory design pattern in Swift 3.0 - ios

Question

I would like to implement the factory design pattern in Swift 3.0.
The basic solution that I am thinking of is:
Define a protocol that define as object creation method
Implement the protocol within the Object
Is this a sound approach?
Or are there alternative design patterns in Swift?

Answer 1

You can try to use this implementation as a reference.
https://redflowerinc.com/implementing-factory-design-pattern-in-swift/
import UIKit
import PlaygroundSupport
enum Maps : Int {
case google = 1
case apple
}
protocol Display {
func showMap()
}
class Map {
let type : Int = 0
func showMap(type : Maps) -> Display {
switch type {
case Maps.apple :
return AppleMap()
case Maps.google :
fallthrough
default:
return GoogleMap()
}
}
}
class AppleMap : Display {
func showMap() {
print("showing apple map")
}
}
class GoogleMap : Display {
func showMap() {
print("showing google map")
}
}
class MyViewController : UIViewController {
override func loadView() {
let view = UIView()
view.backgroundColor = .white
let label = UILabel()
label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
label.text = "Hello World!"
label.textColor = .black
view.addSubview(label)
self.view = view
let map = Map()
map.showMap(type: Maps.google)
map.showMap(type: Maps.apple)
}
}