Swift 3 Google Maps iOS SDK - Add Marker via Touch

Question

Hello Everyone!
I have a Google maps in my iOS app, what i'm trying to do is when i tap or longtouch i add a marker in the map and also save the coordinates in an Array
For example: In Android i have the method mMap.setOnLongClickListener() and save those markers in a Latlng Array type

Any help would be useful! Thanks

Answer 1

First you need to add a UILongPressGestureRecognizer to your GMSMapView and implementing the UIGestureDelegate protocol to make it work simultaneously with all gestures of GMSMapView after that in longPress action you should translate the CGPoint of touch and convert it in CLLocationCoordinate2Dthe remain is trivial

Use this as example

//
//  DashedOverlayViewController.swift
//  GoogleMapsExample
//
//  Created by Reinier Melian on 17/07/2017.
//  Copyright © 2017 Pruebas. All rights reserved.
//

import UIKit
import GoogleMaps
import GooglePlaces



class DashedOverlayViewController: UIViewController {

    @IBOutlet weak var mapView: GMSMapView!

    var arrayCoordinates : [CLLocationCoordinate2D] = []

    var longPressRecognizer = UILongPressGestureRecognizer()

    @IBAction func longPress(_ sender: UILongPressGestureRecognizer) {
        debugPrint("You tapped at YES")
        let newMarker = GMSMarker(position: mapView.projection.coordinate(for: sender.location(in: mapView)))
        self.arrayCoordinates.append(newMarker.position)
        newMarker.map = mapView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        longPressRecognizer = UILongPressGestureRecognizer(target: self,
                                                           action: #selector(self.longPress))
        longPressRecognizer.minimumPressDuration = 0.5
        longPressRecognizer.delegate = self
        mapView.addGestureRecognizer(longPressRecognizer)

        mapView.isMyLocationEnabled = true
        mapView.settings.compassButton = true

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

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