Swift 4.2 : How to select/deselect multiple marker on google map - swift

Question

I'm implementing multiple markers on google map using swift in iOS. I've successfully placed all the markers on the map and can select the marker using 'didTap marker'method. But I'm unable to deselect it. When user select on one marker than the rest of the markers should be deselected.
extension MapVC {
// Mark:- Create Marker and set position
fileprivate func setMarkerOnMap() {
if self.markerArray.count != 0 {
for i in 0...self.markerArray.count - 1 {
let data = self.markerArray[i]
guard let lat = data.lat else {
return
}
guard let lon = data.long else {
return
}
let camera: GMSCameraPosition = GMSCameraPosition.camera(withLatitude: Double(lat)!, longitude: Double(lon)!, zoom: zoomLevel)
showMarker(position: camera.target, index: i)
}
}
}
// Mark:- Show marker on map
fileprivate func showMarker(position: CLLocationCoordinate2D, inde x: Int) {
let marker = GMSMarker()
marker.position = position
marker.icon = UIImage(named: "marker-unselected-icon")
marker.accessibilityLabel = "\(index)" // get index from array when click on each marker to identify
marker.map = self.mapView
}
}
//MARK - Map
extension MapVC: GMSMapViewDelegate {
// MARK:- DidTap marker
func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker)-> Bool {
if let markerLbl = marker.accessibilityLabel{
index = Int(markerLbl)
}
if marker != self.userMarker{
marker.icon = UIImage(named: "marker-selected-icon")
self.restaurantDetailView.isHidden = false
self.distanceView.isHidden = true
self.infoView.isHidden = true
}
var isReturn = true
mapView.selectedMarker = nil
if self.markerArray.count != 0 {
for i in 0...markerArray.count - 1 {
if i == index {
let storeInfo = markerArray[i]
storeInfo.isSelected = !storeInfo.isSelected
self.destinationLat = Double(storeInfo.lat!)!
self.destinationLng = Double(storeInfo.long!)!
marker.icon = UIImage(named: "marker-selected-icon")
markerArray[i] = storeInfo
} else {
marker.icon = UIImage(named: "marker-unselected-icon")
let storeInfo = markerArray[i]
storeInfo.isSelected = false
markerArray[i] = storeInfo
}
}
} else {
mapView.selectedMarker = nil
isReturn = true
return isReturn
}
return isReturn
}
}
I'm changing the selected marker image in did tap method but unfortunately, it is not working. I don't know what I'm doing wrong. Thanks in Advance.

Answer 1

When user want to select one marker and want to deselect all the other markers then following code would be usefull.
To Deselect all Marker on Map:
for (marker in self.markerArray) {
self.mapview.selectedMarker = nil
}
To Select Marker on Map:
self.mapView.selectedMarker = self.userMarker