onclick event popup in mapkit xcode 8 [closed] - ios

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i have a project done with maps using Open Street Map in xcode mapkit i already added there map and created a polyline, polygon, markers with popups.
i have remaining two parts to do one is to add zoom buttons to map
second one is i need to add a onclick event when i touch somewhere in the map place on the map i need to show a
popup event showing "hey u touch this lat,long".
i used several ways doing researches but i could not archive my goal

Answer 1

First you need add a UITapGestureRecognizer to your MKMapView in your viewDidLoad method
like this
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.showPopup(tapGesture:)))
self.mapView.addGestureRecognizer(tapGestureRecognizer)
after that you need to implement the Tap selector method, the main issue you will found is get the real location based on the touch screen coordinates your can do that using the MKMapView convert method
like this
let coordinate = self.mapView.convert(tapGesture.location(in: self.mapView), toCoordinateFrom: self.mapView) //here we convert touch location from Screen location to map coordinates
Your full code for show an alert popup with coordinates touched
func showPopup(tapGesture:UITapGestureRecognizer)
{
let coordinate = self.mapView.convert(tapGesture.location(in: self.mapView), toCoordinateFrom: self.mapView)
let alertViewController = UIAlertController(title: "TOUCH IN MAP", message: "coordinate is lat: \(coordinate.latitude) long: \(coordinate.longitude)", preferredStyle: .alert)
let action = UIAlertAction(title: "Accept", style: .destructive, handler: nil)
alertViewController.addAction(action)
self.present(alertViewController, animated: true, completion: nil)
}