iOS: Delete ALL Core Data Swift

Question

I am a little confused as to how to delete all core data in swift. I have created a button with an IBAction linked. On the click of the button I have the follow

Answer 1

For Swift 3.0

func DeleteAllData(){


    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    let managedContext = appDelegate.persistentContainer.viewContext
    let DelAllReqVar = NSBatchDeleteRequest(fetchRequest: NSFetchRequest(entityName: "Entity"))
    do {
        try managedContext.execute(DelAllReqVar)
    }
    catch {
        print(error)
    }
}