Add a marker to a map

This example displays a map with pins for markers on Sydney and Melbourne, Australia.

Get started

Before you can try the sample code, you must configure your development environment. For more information, see Maps SDK for iOS code samples.

View the code

Swift

import GoogleMaps import UIKit  // Sample code for adding a marker. class MarkersViewController: UIViewController {   private lazy var sydneyMarker = GMSMarker(     position: CLLocationCoordinate2D(latitude: -33.8683, longitude: 151.2086))    private lazy var melbourneMarker = GMSMarker(     position: CLLocationCoordinate2D(latitude: -37.81969, longitude: 144.966085))    private lazy var mapView: GMSMapView = {     let camera = GMSCameraPosition(latitude: -37.81969, longitude: 144.966085, zoom: 4)     return GMSMapView(frame: .zero, camera: camera)   }()    override func loadView() {     view = mapView      sydneyMarker.title = "Sydney"     sydneyMarker.snippet = "Population: 4,605,992"     sydneyMarker.isFlat = false     sydneyMarker.rotation = 30     print("sydneyMarker: \(sydneyMarker)")      let australiaMarker = GMSMarker(       position: CLLocationCoordinate2D(latitude: -27.994401, longitude: 140.07019))     australiaMarker.title = "Australia"     australiaMarker.appearAnimation = .pop     australiaMarker.isFlat = true     australiaMarker.isDraggable = true     australiaMarker.groundAnchor = CGPoint(x: 0.5, y: 0.5)     australiaMarker.icon = UIImage(named: "australia")     australiaMarker.map = mapView      mapView.selectedMarker = sydneyMarker     navigationItem.rightBarButtonItem = UIBarButtonItem(       barButtonSystemItem: .add, target: self, action: #selector(tapAdd))   }    @objc func tapAdd() {     if sydneyMarker.map == nil {       sydneyMarker.map = mapView     } else {       sydneyMarker.map = nil     }     melbourneMarker.title = "Melbourne"     melbourneMarker.snippet = "Population: 4,169,103"     melbourneMarker.map = mapView   } }
MarkersViewController.swift

Objective-C

#import "GoogleMapsDemos/Samples/MarkersViewController.h"  #import <GoogleMaps/GoogleMaps.h>  @implementation MarkersViewController {   GMSMarker *_sydneyMarker;   GMSMarker *_melbourneMarker;   GMSMarker *_fadeInMarker; }  - (void)viewDidLoad {   [super viewDidLoad];   GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-37.81969                                                           longitude:144.966085                                                                zoom:4];   GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];    _sydneyMarker = [[GMSMarker alloc] init];   _sydneyMarker.title = @"Sydney";   _sydneyMarker.snippet = @"Population: 4,605,992";   _sydneyMarker.position = CLLocationCoordinate2DMake(-33.8683, 151.2086);   _sydneyMarker.flat = NO;   _sydneyMarker.rotation = 30.0;   NSLog(@"sydneyMarker: %@", _sydneyMarker);    GMSMarker *australiaMarker = [[GMSMarker alloc] init];   australiaMarker.title = @"Australia";   australiaMarker.position = CLLocationCoordinate2DMake(-27.994401, 140.07019);   australiaMarker.appearAnimation = kGMSMarkerAnimationPop;   australiaMarker.flat = YES;   australiaMarker.draggable = YES;   australiaMarker.groundAnchor = CGPointMake(0.5, 0.5);   australiaMarker.icon = [UIImage imageNamed:@"australia"];   australiaMarker.map = mapView;    _fadeInMarker = [[GMSMarker alloc] init];   _fadeInMarker.title = @"Australia";   _fadeInMarker.position = CLLocationCoordinate2DMake(-29.9959, 145.0719);   _fadeInMarker.appearAnimation = kGMSMarkerAnimationFadeIn;   _fadeInMarker.icon = [UIImage imageNamed:@"australia"];    // Set the marker in Sydney to be selected   mapView.selectedMarker = _sydneyMarker;    self.view = mapView;   self.navigationItem.rightBarButtonItem =       [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd                                                     target:self                                                     action:@selector(didTapAdd)]; }  - (void)didTapAdd {   if (_sydneyMarker.map == nil) {     _sydneyMarker.map = (GMSMapView *)self.view;   } else {     _sydneyMarker.map = nil;   }    _melbourneMarker.map = nil;   _melbourneMarker = [[GMSMarker alloc] init];   _melbourneMarker.title = @"Melbourne";   _melbourneMarker.snippet = @"Population: 4,169,103";   _melbourneMarker.position = CLLocationCoordinate2DMake(-37.81969, 144.966085);   _melbourneMarker.map = (GMSMapView *)self.view;    if (_fadeInMarker.map) {     _fadeInMarker.map = nil;   } else {     _fadeInMarker.map = (GMSMapView *)self.view;   } }  @end
MarkersViewController.m

Run the full sample app locally

The Maps SDK for iOS sample app is available as a download archive from GitHub. Follow these steps to install and try the Maps SDK for iOS sample app.

  1. Run git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git to clone the samples repository into a local directory.

  2. Open a terminal window, navigate to the directory where you cloned the sample files, and drill down into the GoogleMaps directory:

    Swift

    cd maps-sdk-for-ios-samples-main/GoogleMaps-Swift pod install open GoogleMapsSwiftDemos.xcworkspace

    Objective-C

    cd maps-sdk-for-ios-samples-main/GoogleMaps pod install open GoogleMapsDemos.xcworkspace
  3. In Xcode, press the compile button to build the app with the current scheme. The build produces an error, prompting you to enter your API key in the SDKConstants.swift file for Swift orSDKDemoAPIKey.h file for Objective-C.
  4. Get an API key from your project with the Maps SDK for iOS enabled.
  5. Edit the SDKConstants.swift file for Swift orSDKDemoAPIKey.h file for Objective-C and paste your API key into the definition of either the apiKey or kAPIKey constant. For example:

    Swift

    static let apiKey = "YOUR_API_KEY"

    Objective-C

    static NSString *const kAPIKey = @"YOUR_API_KEY";
  6. In the SDKConstants.swift file (Swift) orSDKDemoAPIKey.h file (Objective-C), remove the following line, because it's used to register the user-defined issue:

    Swift

    #error (Register for API Key and insert here. Then delete this line.)

    Objective-C

    #error Register for API Key and insert here.
  7. Build and run the project. The iOS simulator window appears, showing a list of Maps SDK Demos.
  8. Choose one of the options displayed, to experiment with a feature of the Maps SDK for iOS.
  9. If prompted to allow GoogleMapsDemos to access your location, choose Allow.