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

Similar to above but with AppDelegte call taken out and UIView variable used

var context: NSManagedObjectContext?
//deleting Message

func deleteMessages(entity: String) {
   do {
      let request = NSFetchRequest(entityName: entity)
      print(request)

      if let result = try context!.executeFetchRequest(request) as? [your class of NSManagedObject] {
          for message in result {
             context!.deleteObject(message)
             try context!.save()
             print(message)
             self.tableView.reloadData()
          }
      }
   } catch {
         print("miss")
   }
}

To use call function

self.deleteMessages("TimeMaster")