CoreData Helper to Delete All Entities

CoreDataHelper.swift

//
//  CoreDataHelper.swift
//  Xcode 8.0
//  Swift 3.0
//  Subclass of CoreDataStack - 
//  https://gist.github.com/bishalg/6e3a4fc4020b558f40b02c1d835aad8b
// 

import Foundation
import CoreData

class CoreDataHelper: CoreDataStack {
  
  // Singleton
  static let shared = CoreDataHelper()
  fileprivate override init() { }
  
  func deleteAllEntities() {
    let entities = managedObjectModel.entities
    for entitie in entities {
      debugPrint("Deleting Entitie - ", entitie.name)
      delete(entityName: entitie.name!)
    }
  }
  
  func delete(entityName: String) {
    let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: entityName)
    let deleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
    do {
      try persistentStoreCoordinator.execute(deleteRequest, with: managedObjectContext)
      debugPrint("Deleted Entitie - ", entityName)
    } catch let error as NSError {
      debugPrint("Delete ERROR \(entityName)")
      debugPrint(error)
    }
  }

}