Touch-Gesten zur Kartensteuerung aktivieren und deaktivieren
Mit Sammlungen den Überblick behalten Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.
Die Karte reagiert nur dann auf Zoom-Gesten, wenn der Schalter aktiviert ist.
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
importGoogleMapsimportUIKitclassGestureControlViewController:UIViewController{privateletholderHeight:CGFloat=60privateletzoomLabelInset:CGFloat=16privatelazyvarmapView:GMSMapView={letcamera=GMSCameraPosition(latitude:-25.5605,longitude:133.605097,zoom:3)returnGMSMapView(frame:.zero,camera:camera)}()privatelazyvarzoomSwitch:UISwitch=UISwitch(frame:.zero)overridefuncviewDidLoad(){super.viewDidLoad()view.addSubview(mapView)letholder=UIView(frame:.zero)holder.backgroundColor=UIColor(white:1,alpha:0.8)view.addSubview(holder)letzoomLabel=UILabel(frame:.zero)zoomLabel.text="Zoom gestures"zoomLabel.font=.boldSystemFont(ofSize:18)holder.addSubview(zoomLabel)// Control zooming.holder.addSubview(zoomSwitch)zoomSwitch.addTarget(self,action:#selector(toggleZoom),for:.valueChanged)zoomSwitch.isOn=true[mapView,holder,zoomLabel,zoomSwitch].forEach({$0.translatesAutoresizingMaskIntoConstraints=false})NSLayoutConstraint.activate([mapView.leftAnchor.constraint(equalTo:view.leftAnchor),mapView.rightAnchor.constraint(equalTo:view.rightAnchor),mapView.topAnchor.constraint(equalTo:view.topAnchor),mapView.bottomAnchor.constraint(equalTo:view.bottomAnchor),holder.heightAnchor.constraint(equalToConstant:holderHeight),holder.centerXAnchor.constraint(equalTo:view.centerXAnchor),holder.widthAnchor.constraint(equalTo:view.widthAnchor),zoomLabel.leftAnchor.constraint(equalTo:holder.leftAnchor,constant:zoomLabelInset),zoomLabel.centerYAnchor.constraint(equalTo:holder.centerYAnchor),zoomSwitch.rightAnchor.constraint(equalTo:holder.rightAnchor,constant:-zoomLabelInset),zoomSwitch.centerYAnchor.constraint(equalTo:holder.centerYAnchor),])NSLayoutConstraint.activate([holder.topAnchor.constraint(equalTo:self.view.safeAreaLayoutGuide.topAnchor)])}@objcfunctoggleZoom(){mapView.settings.zoomGestures=zoomSwitch.isOn}}
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 installopen GoogleMapsSwiftDemos.xcworkspace
Objective-C
cd maps-sdk-for-ios-samples-main/GoogleMaps pod installopen 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.
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
staticNSString*constkAPIKey=@"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.
[[["Leicht verständlich","easyToUnderstand","thumb-up"],["Mein Problem wurde gelöst","solvedMyProblem","thumb-up"],["Sonstiges","otherUp","thumb-up"]],[["Benötigte Informationen nicht gefunden","missingTheInformationINeed","thumb-down"],["Zu umständlich/zu viele Schritte","tooComplicatedTooManySteps","thumb-down"],["Nicht mehr aktuell","outOfDate","thumb-down"],["Problem mit der Übersetzung","translationIssue","thumb-down"],["Problem mit Beispielen/Code","samplesCodeIssue","thumb-down"],["Sonstiges","otherDown","thumb-down"]],["Zuletzt aktualisiert: 2025-07-26 (UTC)."],[[["\u003cp\u003eThis webpage provides code samples demonstrating how to control zoom gestures on a Google Map using a switch.\u003c/p\u003e\n"],["\u003cp\u003eWhen the switch is toggled on, users can zoom in and out of the map using gestures.\u003c/p\u003e\n"],["\u003cp\u003eTo run the sample code, you need to configure your development environment and obtain a Google Maps API key.\u003c/p\u003e\n"],["\u003cp\u003eThe webpage provides step-by-step instructions on how to set up and run the sample app locally.\u003c/p\u003e\n"]]],["The provided code demonstrates how to control zoom gestures on a Google Map in iOS using a switch. A `GMSMapView` is created, and a `UISwitch` toggles zoom gesture functionality on or off. When the switch is on, zoom gestures are enabled; when off, they are disabled. The code examples are provided in both Swift and Objective-C and include instructions on how to install the Maps SDK for iOS sample app.\n"],null,["The map responds to zoom gestures only when the switch is toggled on.\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\nclass GestureControlViewController: UIViewController {\n private let holderHeight: CGFloat = 60\n private let zoomLabelInset: CGFloat = 16\n\n private lazy var mapView: GMSMapView = {\n let camera = GMSCameraPosition(latitude: -25.5605, longitude: 133.605097, zoom: 3)\n return GMSMapView(frame: .zero, camera: camera)\n }()\n private lazy var zoomSwitch: UISwitch = UISwitch(frame: .zero)\n\n override func viewDidLoad() {\n super.viewDidLoad()\n\n view.addSubview(mapView)\n\n let holder = UIView(frame: .zero)\n holder.backgroundColor = UIColor(white: 1, alpha: 0.8)\n view.addSubview(holder)\n\n let zoomLabel = UILabel(frame: .zero)\n zoomLabel.text = \"Zoom gestures\"\n zoomLabel.font = .boldSystemFont(ofSize: 18)\n holder.addSubview(zoomLabel)\n\n // Control zooming.\n holder.addSubview(zoomSwitch)\n zoomSwitch.addTarget(self, action: #selector(toggleZoom), for: .valueChanged)\n zoomSwitch.isOn = true\n\n [mapView, holder, zoomLabel, zoomSwitch].forEach({\n $0.translatesAutoresizingMaskIntoConstraints = false\n })\n NSLayoutConstraint.activate([\n mapView.leftAnchor.constraint(equalTo: view.leftAnchor),\n mapView.rightAnchor.constraint(equalTo: view.rightAnchor),\n mapView.topAnchor.constraint(equalTo: view.topAnchor),\n mapView.bottomAnchor.constraint(equalTo: view.bottomAnchor),\n holder.heightAnchor.constraint(equalToConstant: holderHeight),\n holder.centerXAnchor.constraint(equalTo: view.centerXAnchor),\n holder.widthAnchor.constraint(equalTo: view.widthAnchor),\n zoomLabel.leftAnchor.constraint(equalTo: holder.leftAnchor, constant: zoomLabelInset),\n zoomLabel.centerYAnchor.constraint(equalTo: holder.centerYAnchor),\n zoomSwitch.rightAnchor.constraint(equalTo: holder.rightAnchor, constant: -zoomLabelInset),\n zoomSwitch.centerYAnchor.constraint(\n equalTo: holder.centerYAnchor),\n ])\n NSLayoutConstraint.activate([\n holder.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor)\n ])\n }\n\n @objc func toggleZoom() {\n mapView.settings.zoomGestures = zoomSwitch.isOn\n }\n\n}https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/5092537f1ae5f51e9a7fd0ab6523d52f06a5b8a9/GoogleMaps-Swift/GoogleMapsSwiftDemos/Swift/Samples/GestureControlViewController.swift#L14-L72\n \n```\n\nObjective-C \n\n```objective-c\n#import \"GoogleMapsDemos/Samples/GestureControlViewController.h\"\n\n#import \u003cGoogleMaps/GoogleMaps.h\u003e\n\n@implementation GestureControlViewController {\n GMSMapView *_mapView;\n UISwitch *_zoomSwitch;\n}\n\n- (void)viewDidLoad {\n [super viewDidLoad];\n GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-25.5605\n longitude:133.605097\n zoom:3];\n\n _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];\n _mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;\n _mapView.accessibilityIdentifier = @\"gestureControlDemoMapView\";\n\n self.view = [[UIView alloc] initWithFrame:CGRectZero];\n [self.view addSubview:_mapView];\n\n UIView *holder = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 0, 59)];\n holder.autoresizingMask =\n UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;\n holder.backgroundColor = [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.8f];\n [self.view addSubview:holder];\n\n // Zoom label.\n UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(16, 16, 200, 29)];\n label.text = @\"Zooming?\";\n label.font = [UIFont boldSystemFontOfSize:18.0f];\n label.textAlignment = NSTextAlignmentLeft;\n label.backgroundColor = [UIColor clearColor];\n label.layer.shadowColor = [[UIColor whiteColor] CGColor];\n label.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);\n label.layer.shadowOpacity = 1.0f;\n label.layer.shadowRadius = 0.0f;\n [holder addSubview:label];\n\n // Control zooming.\n _zoomSwitch = [[UISwitch alloc] initWithFrame:CGRectMake(-90, 16, 0, 0)];\n _zoomSwitch.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin;\n [_zoomSwitch addTarget:self\n action:@selector(didChangeZoomSwitch)\n forControlEvents:UIControlEventValueChanged];\n _zoomSwitch.on = YES;\n [holder addSubview:_zoomSwitch];\n}\n\n- (void)didChangeZoomSwitch {\n _mapView.settings.zoomGestures = _zoomSwitch.isOn;\n}\n\n@end \nhttps://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/5092537f1ae5f51e9a7fd0ab6523d52f06a5b8a9/GoogleMaps/GoogleMapsDemos/Samples/GestureControlViewController.m#L16-L70\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**."]]