How to create a singleton class in swift? [duplicate]

Question

I need to create a singleton class in Swift. Can anyone help me with the code? I already know that singleton classes are very helpful in creating generic code.

Answer 1

There are many ways to create a Singleton Class in Swift. I am sharing with you one of the ways to implement this.

Write below code in Singleton Class.

import UIKit

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

   private override init() { }

   func foo() { }
}

To access Singleton Class referencefrom other class:

let glblData = GlobalData.sharedInstance

OR access method directly

GlobalData.sharedInstance.foo()

Now we can use glblData as a reference to your singleton Class.

Answer 2

class Singleton  {
   static let sharedInstance = Singleton()
}