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import GoogleMaps import UIKit  class MyLocationViewController: UIViewController {    private let cameraLatitude: CLLocationDegrees = -33.868    private let cameraLongitude: CLLocationDegrees = 151.2086    private let cameraZoom: Float = 12    lazy var mapView: GMSMapView = {     let camera = GMSCameraPosition(       latitude: cameraLatitude, longitude: cameraLongitude, zoom: cameraZoom)     return GMSMapView(frame: .zero, camera: camera)   }()    var observation: NSKeyValueObservation?   var location: CLLocation? {     didSet {       guard oldValue == nil, let firstLocation = location else { return }       mapView.camera = GMSCameraPosition(target: firstLocation.coordinate, zoom: 14)     }   }    override func viewDidLoad() {     super.viewDidLoad()      mapView.delegate = self     mapView.settings.compassButton = true     mapView.settings.myLocationButton = true     mapView.isMyLocationEnabled = true     view = mapView      // Listen to the myLocation property of GMSMapView.     observation = mapView.observe(\.myLocation, options: [.new]) {       [weak self] mapView, _ in       self?.location = mapView.myLocation     }   }    deinit {     observation?.invalidate()   } }  extension MyLocationViewController: GMSMapViewDelegate {   func mapView(_ mapView: GMSMapView, didTapMyLocation location: CLLocationCoordinate2D) {     let alert = UIAlertController(       title: "Location Tapped",       message: "Current location: <\(location.latitude), \(location.longitude)>",       preferredStyle: .alert)     alert.addAction(UIAlertAction(title: "OK", style: .default))     present(alert, animated: true)   } }
MyLocationViewController.swift
       

#import "GoogleMapsDemos/Samples/MyLocationViewController.h"  #import <GoogleMaps/GoogleMaps.h>  @implementation MyLocationViewController {   GMSMapView *_mapView;   BOOL _firstLocationUpdate; }  - (void)viewDidLoad {   [super viewDidLoad];   GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868                                                           longitude:151.2086                                                                zoom:12];    _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];   _mapView.delegate = self;   _mapView.settings.compassButton = YES;   _mapView.settings.myLocationButton = YES;    // Listen to the myLocation property of GMSMapView.   [_mapView addObserver:self              forKeyPath:@"myLocation"                 options:NSKeyValueObservingOptionNew                 context:NULL];    self.view = _mapView;    // Ask for My Location data after the map has already been added to the UI.   GMSMapView *mapView = _mapView;   dispatch_async(dispatch_get_main_queue(), ^{     mapView.myLocationEnabled = YES;   }); }  - (void)mapView:(GMSMapView *)mapView didTapMyLocation:(CLLocationCoordinate2D)location {   NSString *message = [NSString stringWithFormat:@"My Location Dot Tapped at: [lat: %f, lng: %f]",                                                  location.latitude, location.longitude];   UIAlertController *alertController =       [UIAlertController alertControllerWithTitle:@"Location Tapped"                                           message:message                                    preferredStyle:UIAlertControllerStyleAlert];   UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK"                                                      style:UIAlertActionStyleDefault                                                    handler:^(UIAlertAction *action){                                                    }];   [alertController addAction:okAction];   [self presentViewController:alertController animated:YES completion:nil]; }  - (void)dealloc {   [_mapView removeObserver:self forKeyPath:@"myLocation" context:NULL]; }  #pragma mark - KVO updates  - (void)observeValueForKeyPath:(NSString *)keyPath                       ofObject:(id)object                         change:(NSDictionary *)change                        context:(void *)context {   if (!_firstLocationUpdate) {     // If the first location update has not yet been received, then jump to that location.     _firstLocationUpdate = YES;     CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey];     _mapView.camera = [GMSCameraPosition cameraWithTarget:location.coordinate zoom:14];   } }  @end
MyLocationViewController.m