UISelectionFeedbackGenerator iOS 9 compatible

gistfile1.txt

import UIKit

@available(iOS 10.0, *)
private var _generator: UISelectionFeedbackGenerator?

class SelectionFeedbackGenerator {

  init() {
    if #available(iOS 10, *) {
      _generator = UISelectionFeedbackGenerator()
      _generator?.prepare()
    }
  }

  func selectionChanged() {
    if #available(iOS 10, *) {
      _generator?.selectionChanged()
      _generator?.prepare()
    }
  }

  deinit {
    if #available(iOS 10, *) {
      _generator = nil
    }
  }

}