Accessibility accessibilityDecrement() not getting

Question

Why are not accessibilityDecrement() and accessibilityIncrement() getting called in my custom UITextView when performing the appropriate gestures?

class CustomTextView: UITextView  {

   required init?(coder aDecoder: NSCoder) {
      super.init(coder: aDecoder)
      accessibilityTraits = accessibilityTraits | UIAccessibilityTraitAdjustable
   }

   override func accessibilityDecrement() {
      print("Decrement")
   }

   override func accessibilityIncrement() {
      print("Increment")
   }
}

Answer 1

Try with:

isAccessibilityElement = true

accessibilityTraits = super.accessibilityTraits | UIAccessibilityTraitAdjustable

Answer 2

My bad. Turns out I had forgotten that I was setting textView.accessibilityTraits = UIAccessibilityTraitStaticText in the ViewController.viewDidLoad. Duhh...