CLC_createList.swift

  private func createList() {
    let context = CoreDataManager.shared.persistentContainer.viewContext
    let list = NSEntityDescription.insertNewObject(forEntityName: "List", into: context)
    list.setValue(nameTextField.text, forKey: "name")
    if let firstColor = firstColorData {
      list.setValue(firstColor, forKey: "firstColor")
    }
    if let secondColor = secondColorData {
      list.setValue(secondColor, forKey: "secondColor")
    }
    if let image = iconImage.image {
      let imageData = image.jpegData(compressionQuality: 0.8)
      list.setValue(imageData, forKey: "imageData")
      iconCellView.image = UIImage(data: imageData!)
    }
    do {
      try context.save()
      dismiss(animated: true) {
        self.delegate?.didAddList(list: list as! List)
      }
    } catch {
      let nserror = error as NSError
      fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
    }
  }