Mantieni tutto organizzato con le raccolte Salva e classifica i contenuti in base alle tue preferenze.
Sviluppatori dello Spazio economico europeo (SEE)
Quando la mappa viene premuta a lungo, le coordinate del gesto vengono inviate al servizio di geocoding inverso. Se l'operazione va a buon fine, alla mappa viene aggiunto un indicatore con una finestra informativa contenente il risultato.
Inizia
Prima di poter provare il codice di esempio, devi configurare l'ambiente di sviluppo. Per ulteriori informazioni, consulta Esempi di codice di Maps SDK for iOS.
Visualizzare il codice
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
L'app di esempio dell'SDK Maps per iOS è disponibile come archivio di download da GitHub. Segui questi passaggi per installare e provare l'app di esempio Maps SDK for iOS.
Esegui git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git per clonare il repository di esempi in una directory locale.
Apri una finestra del terminale, vai alla directory in cui hai clonato i file di esempio e vai alla directory GoogleMaps:
Swift
cd maps-sdk-for-ios-samples-main/GoogleMaps-Swift pod installopen GoogleMapsSwiftDemos.xcworkspace
Objective-C
cd maps-sdk-for-ios-samples-main/GoogleMaps pod installopen GoogleMapsDemos.xcworkspace
In Xcode, premi il pulsante di compilazione per creare l'app con lo schema corrente. La build genera un errore, che ti chiede di inserire la chiave API nel file SDKConstants.swift per Swift o nel fileSDKDemoAPIKey.h per Objective-C.
Modifica il file SDKConstants.swift per Swift o il file SDKDemoAPIKey.h per Objective-C e incolla la chiave API nella definizione della costante apiKey o kAPIKey. Ad esempio:
Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
staticNSString*constkAPIKey=@"YOUR_API_KEY";
Nel file SDKConstants.swift (Swift) oSDKDemoAPIKey.h (Objective-C), rimuovi la seguente riga, perché viene utilizzata per registrare il problema definito dall'utente:
Swift
#error (Register for API Key and insert here. Then delete this line.)
Objective-C
#error Register for API Key and insert here.
Crea ed esegui il progetto. Viene visualizzata la finestra del simulatore iOS, che mostra un elenco di demo di Maps SDK.
Scegli una delle opzioni visualizzate per sperimentare una funzionalità di Maps SDK for iOS.
Se ti viene chiesto di consentire a GoogleMapsDemos di accedere alla tua posizione, scegli Consenti.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-08-27 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**."]]