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This example displays a map with two markers. When a marker is tapped, the
camera zooms and rotates to focus on the selected marker.
Get started
Before you can try the sample code, you must configure your development environment.
For more information, seeMaps SDK for iOS code samples.
View the code
Swift
importGoogleMapsimportUIKitfinalclassMarkerEventsViewController:UIViewController{privatelazyvarmapView:GMSMapView={letcamera=GMSCameraPosition(latitude:-37.81969,longitude:144.966085,zoom:4)returnGMSMapView(frame:.zero,camera:camera)}()privatevarmelbourneMarker=GMSMarker(position:CLLocationCoordinate2D(latitude:-37.81969,longitude:144.966085))overridefuncloadView(){letsydneyMarker=GMSMarker(position:CLLocationCoordinate2D(latitude:-33.8683,longitude:151.2086))sydneyMarker.map=mapViewmelbourneMarker.map=mapViewmapView.delegate=selfview=mapView}}extensionMarkerEventsViewController:GMSMapViewDelegate{funcmapView(_mapView:GMSMapView,markerInfoWindowmarker:GMSMarker)->UIView?{ifmarker==melbourneMarker{returnUIImageView(image:UIImage(named:"Icon"))}returnnil}funcmapView(_mapView:GMSMapView,didTapmarker:GMSMarker)->Bool{// Animate to the markerCATransaction.begin()CATransaction.setAnimationDuration(3)letcamera=GMSCameraPosition(target:marker.position,zoom:8,bearing:50,viewingAngle:60)mapView.animate(to:camera)CATransaction.commit()// Melbourne marker has a InfoWindow so return false to allow markerInfoWindow to// fire. Also check that the marker isn't already selected so that the InfoWindow// doesn't close.ifmarker==melbourneMarker&&mapView.selectedMarker!=melbourneMarker{returnfalse}returntrue}}
#import "GoogleMapsDemos/Samples/MarkerEventsViewController.h"#import <QuartzCore/QuartzCore.h>#import <GoogleMaps/GoogleMaps.h>@implementationMarkerEventsViewController{GMSMapView*_mapView;GMSMarker*_melbourneMarker;BOOL_rotating;}-(void)viewDidLoad{[superviewDidLoad];GMSCameraPosition*camera=[GMSCameraPositioncameraWithLatitude:-37.81969longitude:144.966085zoom:4];_mapView=[GMSMapViewmapWithFrame:CGRectZerocamera:camera];GMSMarker*sydneyMarker=[[GMSMarkeralloc]init];sydneyMarker.position=CLLocationCoordinate2DMake(-33.8683,151.2086);sydneyMarker.map=_mapView;_melbourneMarker=[[GMSMarkeralloc]init];_melbourneMarker.position=CLLocationCoordinate2DMake(-37.81969,144.966085);_melbourneMarker.map=_mapView;_mapView.delegate=self;self.view=_mapView;}#pragma mark - GMSMapViewDelegate-(UIView*)mapView:(GMSMapView*)mapViewmarkerInfoWindow:(GMSMarker*)marker{if(marker==_melbourneMarker){return[[UIImageViewalloc]initWithImage:[UIImageimageNamed:@"Icon"]];}returnnil;}-(BOOL)mapView:(GMSMapView*)mapViewdidTapMarker:(GMSMarker*)marker{GMSCameraPosition*camera=[[GMSCameraPositionalloc]initWithTarget:marker.positionzoom:8bearing:50viewingAngle:60];// Animate to the marker[CATransactionbegin];[CATransactionsetAnimationDuration:3.f];// 3 second animation[CATransactionsetCompletionBlock:^{if(_rotating){// Animation was interrupted by orientation change.[CATransactionsetDisableActions:true];// Disable animation to avoid interruption from rotation.[_mapViewanimateToCameraPosition:camera];}}];[mapViewanimateToCameraPosition:camera];[CATransactioncommit];// Melbourne marker has a InfoWindow so return NO to allow markerInfoWindow to fire. Also check// that the marker isn't already selected so that the InfoWindow doesn't close.if(marker==_melbourneMarker&&mapView.selectedMarker!=_melbourneMarker){returnNO;}// The Tap has been handled so return YESreturnYES;}-(void)viewWillTransitionToSize:(CGSize)sizewithTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator{_rotating=true;[coordinatoranimateAlongsideTransition:nilcompletion:^(id<UIViewControllerTransitionCoordinatorContext>_Nonnullcontext){_rotating=false;}];[superviewWillTransitionToSize:sizewithTransitionCoordinator:coordinator];}@end
The Maps SDK for iOS sample app is available as adownload archivefromGitHub.
Follow these steps to install and try the Maps SDK for iOS sample app.
Rungit clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.gitto clone the samples repository into a local directory.
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-Swiftpod installopen GoogleMapsSwiftDemos.xcworkspace
Objective-C
cd maps-sdk-for-ios-samples-main/GoogleMapspod installopen GoogleMapsDemos.xcworkspace
In Xcode, press the compile button tobuild the appwith the current scheme. The build produces an error, prompting you to enter your API key
in theSDKConstants.swiftfile for Swift orSDKDemoAPIKey.hfile for Objective-C.
Edit theSDKConstants.swiftfile for Swift orSDKDemoAPIKey.hfile for Objective-C and paste your API key into the definition of either theapiKeyorkAPIKeyconstant. For example:
Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
staticNSString*constkAPIKey=@"YOUR_API_KEY";
In theSDKConstants.swiftfile (Swift) orSDKDemoAPIKey.hfile (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.
Build and run the project. The iOS simulator window appears, showing
a list ofMaps SDK Demos.
Choose one of the options displayed, to experiment with a feature of the
Maps SDK for iOS.
If prompted to allow GoogleMapsDemos to access your location, chooseAllow.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis example demonstrates marker interaction on a map with two markers (Sydney and Melbourne).\u003c/p\u003e\n"],["\u003cp\u003eWhen a marker is tapped, the map animates with a zoom, bearing, and viewing angle change, focusing on the selected marker.\u003c/p\u003e\n"],["\u003cp\u003eThe Melbourne marker has a custom info window displayed when tapped.\u003c/p\u003e\n"],["\u003cp\u003eTo run the sample code, set up your development environment with the Maps SDK for iOS and provide a valid API key.\u003c/p\u003e\n"]]],["The code demonstrates a map with two markers. Tapping a marker triggers the camera to animate to that marker's location, zooming in, rotating to a bearing of 50, and setting the viewing angle to 60. For the Melbourne marker, tapping also displays an InfoWindow with an image. The code examples are in Swift and Objective-C, with instructions provided on how to setup and run a full sample app locally.\n"],null,["This example displays a map with two markers. When a marker is tapped, the camera zooms and rotates to focus on the selected marker.\n\nGet started\n\nBefore you can try the sample code, you must configure your development environment.\nFor more information, see [Maps SDK for iOS code samples](/maps/documentation/ios-sdk/examples).\n\nView the code \n\nSwift \n\n```swift\nimport GoogleMaps\nimport UIKit\n\nfinal class MarkerEventsViewController: UIViewController {\n\n private lazy var mapView: GMSMapView = {\n let camera = GMSCameraPosition(latitude: -37.81969, longitude: 144.966085, zoom: 4)\n return GMSMapView(frame: .zero, camera: camera)\n }()\n\n private var melbourneMarker = GMSMarker(\n position: CLLocationCoordinate2D(latitude: -37.81969, longitude: 144.966085))\n\n override func loadView() {\n let sydneyMarker = GMSMarker(\n position: CLLocationCoordinate2D(latitude: -33.8683, longitude: 151.2086))\n sydneyMarker.map = mapView\n melbourneMarker.map = mapView\n mapView.delegate = self\n view = mapView\n }\n}\n\nextension MarkerEventsViewController: GMSMapViewDelegate {\n func mapView(_ mapView: GMSMapView, markerInfoWindow marker: GMSMarker) -\u003e UIView? {\n if marker == melbourneMarker {\n return UIImageView(image: UIImage(named: \"Icon\"))\n }\n return nil\n }\n\n func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -\u003e Bool {\n // Animate to the marker\n CATransaction.begin()\n CATransaction.setAnimationDuration(3)\n let camera = GMSCameraPosition(target: marker.position, zoom: 8, bearing: 50, viewingAngle: 60)\n mapView.animate(to: camera)\n CATransaction.commit()\n\n // Melbourne marker has a InfoWindow so return false to allow markerInfoWindow to\n // fire. Also check that the marker isn't already selected so that the InfoWindow\n // doesn't close.\n if marker == melbourneMarker && mapView.selectedMarker != melbourneMarker {\n return false\n }\n return true\n }\n}https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps-Swift/GoogleMapsSwiftDemos/Swift/Samples/MarkerEventsViewController.swift#L14-L61\n \n```\n\nObjective-C \n\n```objective-c\n#import \"GoogleMapsDemos/Samples/MarkerEventsViewController.h\"\n\n#import \u003cQuartzCore/QuartzCore.h\u003e\n\n#import \u003cGoogleMaps/GoogleMaps.h\u003e\n\n@implementation MarkerEventsViewController {\n GMSMapView *_mapView;\n GMSMarker *_melbourneMarker;\n BOOL _rotating;\n}\n\n- (void)viewDidLoad {\n [super viewDidLoad];\n GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-37.81969\n longitude:144.966085\n zoom:4];\n _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];\n\n GMSMarker *sydneyMarker = [[GMSMarker alloc] init];\n sydneyMarker.position = CLLocationCoordinate2DMake(-33.8683, 151.2086);\n sydneyMarker.map = _mapView;\n\n _melbourneMarker = [[GMSMarker alloc] init];\n _melbourneMarker.position = CLLocationCoordinate2DMake(-37.81969, 144.966085);\n _melbourneMarker.map = _mapView;\n\n _mapView.delegate = self;\n self.view = _mapView;\n}\n\n#pragma mark - GMSMapViewDelegate\n\n- (UIView *)mapView:(GMSMapView *)mapView markerInfoWindow:(GMSMarker *)marker {\n if (marker == _melbourneMarker) {\n return [[UIImageView alloc] initWithImage:[UIImage imageNamed:@\"Icon\"]];\n }\n\n return nil;\n}\n\n- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {\n GMSCameraPosition *camera = [[GMSCameraPosition alloc] initWithTarget:marker.position\n zoom:8\n bearing:50\n viewingAngle:60];\n // Animate to the marker\n [CATransaction begin];\n [CATransaction setAnimationDuration:3.f]; // 3 second animation\n [CATransaction setCompletionBlock:^{\n if (_rotating) { // Animation was interrupted by orientation change.\n [CATransaction\n setDisableActions:true]; // Disable animation to avoid interruption from rotation.\n [_mapView animateToCameraPosition:camera];\n }\n }];\n\n [mapView animateToCameraPosition:camera];\n [CATransaction commit];\n\n // Melbourne marker has a InfoWindow so return NO to allow markerInfoWindow to fire. Also check\n // that the marker isn't already selected so that the InfoWindow doesn't close.\n if (marker == _melbourneMarker && mapView.selectedMarker != _melbourneMarker) {\n return NO;\n }\n\n // The Tap has been handled so return YES\n return YES;\n}\n\n- (void)viewWillTransitionToSize:(CGSize)size\n withTransitionCoordinator:(id\u003cUIViewControllerTransitionCoordinator\u003e)coordinator {\n _rotating = true;\n [coordinator\n animateAlongsideTransition:nil\n completion:^(\n id\u003cUIViewControllerTransitionCoordinatorContext\u003e _Nonnull context) {\n _rotating = false;\n }];\n [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];\n}\n\n@end \nhttps://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps/GoogleMapsDemos/Samples/MarkerEventsViewController.m#L16-L98\n\n \n```\n\nRun the full sample app locally\n\nThe Maps SDK for iOS sample app is available as a\n[download archive](https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/archive/main.zip)\nfrom [GitHub](https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/tree/main/GoogleMaps).\nFollow these steps to install and try the Maps SDK for iOS sample app.\n\n1. Run `git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git` to clone the samples repository into a local directory.\n2. Open a terminal window, navigate to the directory where you cloned the sample files, and\n drill down into the GoogleMaps directory:\n\n Swift \n\n cd maps-sdk-for-ios-samples-main/GoogleMaps-Swift\n pod install\n open GoogleMapsSwiftDemos.xcworkspace\n\n Objective-C \n\n cd maps-sdk-for-ios-samples-main/GoogleMaps\n pod install\n open GoogleMapsDemos.xcworkspace\n\n3. In Xcode, press the compile button to [build the app](https://developer.apple.com/documentation/xcode/building-and-running-an-app) with the current scheme. The build produces an error, prompting you to enter your API key in the `SDKConstants.swift` file for Swift or`SDKDemoAPIKey.h` file for Objective-C.\n4. [Get an API key](/maps/documentation/ios-sdk/get-api-key) from your project with the [Maps SDK for iOS enabled](/maps/documentation/ios-sdk/cloud-setup#enabling-apis).\n5. Edit the `SDKConstants.swift` file for Swift or`SDKDemoAPIKey.h` file for Objective-C and paste your API key into the definition of either the `apiKey` or `kAPIKey` constant. For example: \n\n Swift \n\n ```scdoc\n static let apiKey = \"YOUR_API_KEY\"\n ```\n\n Objective-C \n\n ```objective-c\n static NSString *const kAPIKey = @\"YOUR_API_KEY\";\n ```\n6. In the `SDKConstants.swift` file (Swift) or`SDKDemoAPIKey.h` file (Objective-C), remove the following line, because it's used to register the user-defined issue: \n\n Swift \n\n ```text\n #error (Register for API Key and insert here. Then delete this line.)\n ```\n\n Objective-C \n\n ```text\n #error Register for API Key and insert here.\n ```\n7. Build and run the project. The iOS simulator window appears, showing a list of **Maps SDK Demos**.\n8. Choose one of the options displayed, to experiment with a feature of the Maps SDK for iOS.\n9. If prompted to allow GoogleMapsDemos to access your location, choose **Allow**."]]
