Set up custom Info Window in Google Maps iOS SDK

infowindow.swift

extension ViewController: GMSMapViewDelegate{
    /* handles Info Window tap */
    func mapView(_ mapView: GMSMapView, didTapInfoWindowOf marker: GMSMarker) {
        print("didTapInfoWindowOf")
    }
    
    /* handles Info Window long press */
    func mapView(_ mapView: GMSMapView, didLongPressInfoWindowOf marker: GMSMarker) {
        print("didLongPressInfoWindowOf")
    }

    /* set a custom Info Window */
    func mapView(_ mapView: GMSMapView, markerInfoWindow marker: GMSMarker) -> UIView? {
        let view = UIView(frame: CGRect.init(x: 0, y: 0, width: 200, height: 70))
        view.backgroundColor = UIColor.white
        view.layer.cornerRadius = 6
        
        let lbl1 = UILabel(frame: CGRect.init(x: 8, y: 8, width: view.frame.size.width - 16, height: 15))
        lbl1.text = "Hi there!"
        view.addSubview(lbl1)
        
        let lbl2 = UILabel(frame: CGRect.init(x: lbl1.frame.origin.x, y: lbl1.frame.origin.y + lbl1.frame.size.height + 3, width: view.frame.size.width - 16, height: 15))
        lbl2.text = "I am a custom info window."
        lbl2.font = UIFont.systemFont(ofSize: 14, weight: .light)
        view.addSubview(lbl2)

        return view
    }
}

FYR, If we have implemented

func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {}

then should return false from it.