Auf Markierungsereignisse warten und darauf reagieren
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Dieses Beispiel zeigt eine Karte mit zwei Markierungen. Wenn Sie auf eine Markierung tippen, zoomt und dreht sich die Kamera, um den Fokus auf die ausgewählte Markierung zu richten.
Jetzt starten
Bevor Sie den Beispielcode ausprobieren können, müssen Sie Ihre Entwicklungsumgebung konfigurieren.
Weitere Informationen finden Sie unter Maps SDK for iOS – Beispielcode.
Code ansehen
Swift
import GoogleMaps
import UIKit
final class MarkerEventsViewController: UIViewController {
private lazy var mapView: GMSMapView = {
let camera = GMSCameraPosition(latitude: -37.81969, longitude: 144.966085, zoom: 4)
return GMSMapView(frame: .zero, camera: camera)
}()
private var melbourneMarker = GMSMarker(
position: CLLocationCoordinate2D(latitude: -37.81969, longitude: 144.966085))
override func loadView() {
let sydneyMarker = GMSMarker(
position: CLLocationCoordinate2D(latitude: -33.8683, longitude: 151.2086))
sydneyMarker.map = mapView
melbourneMarker.map = mapView
mapView.delegate = self
view = mapView
}
}
extension MarkerEventsViewController: GMSMapViewDelegate {
func mapView(_ mapView: GMSMapView, markerInfoWindow marker: GMSMarker) -> UIView? {
if marker == melbourneMarker {
return UIImageView(image: UIImage(named: "Icon"))
}
return nil
}
func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
// Animate to the marker
CATransaction.begin()
CATransaction.setAnimationDuration(3)
let camera = 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.
if marker == melbourneMarker && mapView.selectedMarker != melbourneMarker {
return false
}
return true
}
}
Objective-C
#import "GoogleMapsDemos/Samples/MarkerEventsViewController.h"
#import <QuartzCore/QuartzCore.h>
#import <GoogleMaps/GoogleMaps.h>
@implementation MarkerEventsViewController {
GMSMapView *_mapView;
GMSMarker *_melbourneMarker;
BOOL _rotating;
}
- (void)viewDidLoad {
[super viewDidLoad];
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-37.81969
longitude:144.966085
zoom:4];
_mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
GMSMarker *sydneyMarker = [[GMSMarker alloc] init];
sydneyMarker.position = CLLocationCoordinate2DMake(-33.8683, 151.2086);
sydneyMarker.map = _mapView;
_melbourneMarker = [[GMSMarker alloc] init];
_melbourneMarker.position = CLLocationCoordinate2DMake(-37.81969, 144.966085);
_melbourneMarker.map = _mapView;
_mapView.delegate = self;
self.view = _mapView;
}
#pragma mark - GMSMapViewDelegate
- (UIView *)mapView:(GMSMapView *)mapView markerInfoWindow:(GMSMarker *)marker {
if (marker == _melbourneMarker) {
return [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Icon"]];
}
return nil;
}
- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {
GMSCameraPosition *camera = [[GMSCameraPosition alloc] initWithTarget:marker.position
zoom:8
bearing:50
viewingAngle:60];
// Animate to the marker
[CATransaction begin];
[CATransaction setAnimationDuration:3.f]; // 3 second animation
[CATransaction setCompletionBlock:^{
if (_rotating) { // Animation was interrupted by orientation change.
[CATransaction
setDisableActions:true]; // Disable animation to avoid interruption from rotation.
[_mapView animateToCameraPosition:camera];
}
}];
[mapView animateToCameraPosition:camera];
[CATransaction commit];
// 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) {
return NO;
}
// The Tap has been handled so return YES
return YES;
}
- (void)viewWillTransitionToSize:(CGSize)size
withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
_rotating = true;
[coordinator
animateAlongsideTransition:nil
completion:^(
id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
_rotating = false;
}];
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
}
@end
Vollständige Beispielanwendung lokal ausführen
Die Beispiel-App für das Maps SDK for iOS ist als Downloadarchiv auf GitHub verfügbar.
So installieren und testen Sie die Beispiel-App für das Maps SDK for iOS:
- Führen Sie
git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git
aus, um das Beispiel-Repository in ein lokales Verzeichnis zu klonen.
Öffnen Sie ein Terminalfenster, rufen Sie das Verzeichnis auf, in das Sie die Beispieldateien geklont haben, und wechseln Sie zum Verzeichnis „GoogleMaps“:
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
- Klicken Sie in Xcode auf die Schaltfläche „Kompilieren“, um die App mit dem aktuellen Schema zu erstellen. Beim Build wird ein Fehler ausgegeben, der Sie auffordert, Ihren API-Schlüssel in die Datei
SDKConstants.swift
für Swift oder SDKDemoAPIKey.h
für Objective-C einzugeben.
- Rufen Sie einen API-Schlüssel für Ihr Projekt ab, in dem das Maps SDK for iOS aktiviert ist.
- Bearbeite die
SDKConstants.swift
-Datei für Swift oder die SDKDemoAPIKey.h
-Datei für Objective-C und füge deinen API-Schlüssel in die Definition der Konstante apiKey
oder kAPIKey
ein. Beispiel:
Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
static NSString *const kAPIKey = @"YOUR_API_KEY";
- Entfernen Sie in der Datei
SDKConstants.swift
(Swift) oder SDKDemoAPIKey.h
(Objective-C) die folgende Zeile, da sie zum Registrieren des benutzerdefinierten Problems verwendet wird:
Swift
#error (Register for API Key and insert here. Then delete this line.)
Objective-C
#error Register for API Key and insert here.
- Erstellen Sie das Projekt und führen Sie es aus. Das Fenster des iOS-Simulators wird angezeigt. Es enthält eine Liste der Maps SDK-Demos.
- Wählen Sie eine der angezeigten Optionen aus, um eine Funktion des Maps SDK for iOS zu testen.
- Wenn Sie aufgefordert werden, GoogleMapsDemos Zugriff auf Ihren Standort zu gewähren, wählen Sie Zulassen aus.
Sofern nicht anders angegeben, sind die Inhalte dieser Seite unter der Creative Commons Attribution 4.0 License und Codebeispiele unter der Apache 2.0 License lizenziert. Weitere Informationen finden Sie in den Websiterichtlinien von Google Developers. Java ist eine eingetragene Marke von Oracle und/oder seinen Partnern.
Zuletzt aktualisiert: 2025-08-31 (UTC).
[null,null,["Zuletzt aktualisiert: 2025-08-31 (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**."]]