Show UIPickerView like a keyboard, without UITextField

Question

I\'m looking for a way to present a UIPickerView when the user taps on a UIBarButtonItem. Imagine a filter for the table view results.

I know I

Answer 1

Attach a UIPickerView as the inputView of a 0-sized UITextField that you have added to your view.

        let picker = UIPickerView()
        picker.dataSource = self
        picker.delegate = self

        let dummy = UITextField(frame: CGRectZero)
        view.addSubview(dummy)

        dummy.inputView = picker
        dummy.becomeFirstResponder()