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European Economic Area (EEA) developers
When the map is long pressed, the coordinates of the gesture are sent to the
reverse geocoding service. If successful, a marker with an info window
containing the result is added to the map.
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
importGoogleMapsimportUIKit// Sample code for GeoCoder service.classGeocoderViewController:UIViewController{privatelazyvarmapView:GMSMapView={letcamera=GMSCameraPosition(latitude:-33.868,longitude:151.2086,zoom:12)returnGMSMapView(frame:.zero,camera:camera)}()privatelazyvargeocoder=GMSGeocoder()overridefuncloadView(){view=mapViewmapView.delegate=self}}extensionGeocoderViewController:GMSMapViewDelegate{funcmapView(_mapView:GMSMapView,didLongPressAtcoordinate:CLLocationCoordinate2D){// On a long press, reverse geocode this location.geocoder.reverseGeocodeCoordinate(coordinate){response,erroringuardletaddress=response?.firstResult()else{leterrorMessage=error.map{String(describing:$0)}??"<no error>"print("Could not reverse geocode point (\(coordinate.latitude),\(coordinate.longitude)):\(errorMessage)")return}print("Geocoder result:\(address)")letmarker=GMSMarker(position:address.coordinate)marker.appearAnimation=.popmarker.map=mapViewguardletlines=address.lines,lettitle=lines.firstelse{return}marker.title=titleiflines.count>1{marker.snippet=lines[1]}}}}
#import "GoogleMapsDemos/Samples/GeocoderViewController.h"#import <GoogleMaps/GoogleMaps.h>@implementationGeocoderViewController{GMSMapView*_mapView;GMSGeocoder*_geocoder;}-(void)viewDidLoad{[superviewDidLoad];GMSCameraPosition*camera=[GMSCameraPositioncameraWithLatitude:-33.868longitude:151.2086zoom:12];_mapView=[GMSMapViewmapWithFrame:CGRectZerocamera:camera];_mapView.delegate=self;_geocoder=[[GMSGeocoderalloc]init];self.view=_mapView;}-(void)mapView:(GMSMapView*)mapViewdidLongPressAtCoordinate:(CLLocationCoordinate2D)coordinate{// On a long press, reverse geocode this location.__weak__typeof__(self)weakSelf=self;GMSReverseGeocodeCallbackhandler=^(GMSReverseGeocodeResponse*response,NSError*error){[weakSelfhandleResponse:responsecoordinate:coordinateerror:error];};[_geocoderreverseGeocodeCoordinate:coordinatecompletionHandler:handler];}-(void)handleResponse:(nullableGMSReverseGeocodeResponse*)responsecoordinate:(CLLocationCoordinate2D)coordinateerror:(nullableNSError*)error{GMSAddress*address=response.firstResult;if(address){NSLog(@"Geocoder result: %@",address);GMSMarker*marker=[GMSMarkermarkerWithPosition:address.coordinate];NSArray<NSString*>*lines=[addresslines];marker.title=[linesfirstObject];if(lines.count>1){marker.snippet=[linesobjectAtIndex:1];}marker.appearAnimation=kGMSMarkerAnimationPop;marker.map=_mapView;}else{NSLog(@"Could not reverse geocode point (%f,%f): %@",coordinate.latitude,coordinate.longitude,error);}}@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 code demonstrates reverse geocoding, converting coordinates to a human-readable address when a user long-presses a location on a Google Map.\u003c/p\u003e\n"],["\u003cp\u003eUpon a long press, a marker with an info window displaying the address is placed on the map at the specified coordinates.\u003c/p\u003e\n"],["\u003cp\u003eTo run the code, you need to configure your development environment with the Maps SDK for iOS and obtain a Google Maps API key.\u003c/p\u003e\n"],["\u003cp\u003eThe sample app provides various demos showcasing different features of the Maps SDK for iOS, accessible after building and running the project.\u003c/p\u003e\n"]]],["Upon a long press on the map, the gesture's coordinates are sent to the reverse geocoding service. A successful response results in a marker being added to the map at that location. The marker's info window then displays the address obtained from the service. The marker's title shows the first line of the address and the marker snippet displays the second line of the address if present.\n"],null,["**European Economic Area (EEA) developers** If your billing address is in the European Economic Area, effective on 8 July 2025, the [Google Maps Platform EEA Terms of Service](https://cloud.google.com/terms/maps-platform/eea) will apply to your use of the Services. Functionality varies by region. [Learn more](/maps/comms/eea/faq).\n\nWhen the map is long pressed, the coordinates of the gesture are sent to the reverse geocoding service. If successful, a marker with an info window containing the result is added to the map.\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\n// Sample code for GeoCoder service.\nclass GeocoderViewController: UIViewController {\n\n private lazy var mapView: GMSMapView = {\n let camera = GMSCameraPosition(latitude: -33.868, longitude: 151.2086, zoom: 12)\n return GMSMapView(frame: .zero, camera: camera)\n }()\n\n private lazy var geocoder = GMSGeocoder()\n\n override func loadView() {\n view = mapView\n mapView.delegate = self\n }\n}\n\nextension GeocoderViewController: GMSMapViewDelegate {\n func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {\n // On a long press, reverse geocode this location.\n geocoder.reverseGeocodeCoordinate(coordinate) { response, error in\n guard let address = response?.firstResult() else {\n let errorMessage = error.map { String(describing: $0) } ?? \"\u003cno error\u003e\"\n print(\n \"Could not reverse geocode point (\\(coordinate.latitude), \\(coordinate.longitude)): \\(errorMessage)\"\n )\n return\n }\n print(\"Geocoder result: \\(address)\")\n let marker = GMSMarker(position: address.coordinate)\n marker.appearAnimation = .pop\n marker.map = mapView\n\n guard let lines = address.lines, let title = lines.first else { return }\n marker.title = title\n if lines.count \u003e 1 {\n marker.snippet = lines[1]\n }\n }\n }\n}https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps-Swift/GoogleMapsSwiftDemos/Swift/Samples/GeocoderViewController.swift#L14-L56\n \n```\n\nObjective-C \n\n```objective-c\n#import \"GoogleMapsDemos/Samples/GeocoderViewController.h\"\n\n#import \u003cGoogleMaps/GoogleMaps.h\u003e\n\n@implementation GeocoderViewController {\n GMSMapView *_mapView;\n GMSGeocoder *_geocoder;\n}\n\n- (void)viewDidLoad {\n [super viewDidLoad];\n GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868\n longitude:151.2086\n zoom:12];\n\n _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];\n _mapView.delegate = self;\n\n _geocoder = [[GMSGeocoder alloc] init];\n\n self.view = _mapView;\n}\n\n- (void)mapView:(GMSMapView *)mapView didLongPressAtCoordinate:(CLLocationCoordinate2D)coordinate {\n // On a long press, reverse geocode this location.\n __weak __typeof__(self) weakSelf = self;\n GMSReverseGeocodeCallback handler = ^(GMSReverseGeocodeResponse *response, NSError *error) {\n [weakSelf handleResponse:response coordinate:coordinate error:error];\n };\n [_geocoder reverseGeocodeCoordinate:coordinate completionHandler:handler];\n}\n\n- (void)handleResponse:(nullable GMSReverseGeocodeResponse *)response\n coordinate:(CLLocationCoordinate2D)coordinate\n error:(nullable NSError *)error {\n GMSAddress *address = response.firstResult;\n if (address) {\n NSLog(@\"Geocoder result: %@\", address);\n\n GMSMarker *marker = [GMSMarker markerWithPosition:address.coordinate];\n NSArray\u003cNSString *\u003e *lines = [address lines];\n\n marker.title = [lines firstObject];\n if (lines.count \u003e 1) {\n marker.snippet = [lines objectAtIndex:1];\n }\n\n marker.appearAnimation = kGMSMarkerAnimationPop;\n marker.map = _mapView;\n } else {\n NSLog(@\"Could not reverse geocode point (%f,%f): %@\", coordinate.latitude, coordinate.longitude,\n error);\n }\n}\n\n@end \nhttps://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps/GoogleMapsDemos/Samples/GeocoderViewController.m#L16-L71\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**."]]
