UIPicker detect tap on currently selected row

Question

I have a UIPickerView and The method didSelectRow is not called when tapping on a selected row. I need to handle

Answer 1

Here's Nikolay's trick in Swift v3:

First, make your UIViewController implement protocol UIGestureRecognizerDelegate, and add this method to it:

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

Then, apply a UITapGestureRecognizer on the picker, and when your target is called, call the following extension method:

extension UIPickerView {
    func pickerTapped(nizer: UITapGestureRecognizer, onPick: @escaping (Int) -> ()) {
        if nizer.state == .ended {
            let rowHeight = self.rowSize(forComponent: 0).height
            let selectedRowFrame = self.bounds.insetBy(dx: 0, dy: (self.frame.height - rowHeight) / 2)

            // check if begin and end tap locations both fall into the row frame:
            if selectedRowFrame.contains(nizer.location(in: self)) &&
                   selectedRowFrame.contains(nizer.location(ofTouch: 0, in: self)) {
                onPick(self.selectedRow(inComponent: 0))
            }
        }
    }
}