Singleton in Swift

Question

I\'ve been trying to implement a singleton to be used as a cache for photos which I uploaded to my iOS app from the web. I\'ve attached three variants in the code below. I

Answer 1

Swift-5

To create a singleton class:

import UIKit

final class SharedData: NSObject {
   static let sharedInstance = SharedData()

   private override init() { }

   func methodName() { }
}

To access

let sharedClass = SharedClass.sharedInstance

OR

SharedClass.sharedInstance.methodName()