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}}
La app de ejemplo del SDK de Maps para iOS está disponible como archivo de descarga en GitHub.
Sigue estos pasos para instalar y probar la app de ejemplo del SDK de Maps para iOS.
Ejecuta git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git para clonar el repositorio de muestras en un directorio local.
Abre una ventana de terminal, navega al directorio en el que clonaste los archivos de muestra y desplázate hacia abajo hasta el directorio 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
En Xcode, presiona el botón de compilación para
compilar la app
con el esquema actual. La compilación genera un error y te solicita que ingreses tu clave de API
en el archivo SDKConstants.swift para Swift o en el archivoSDKDemoAPIKey.h
para Objective-C.
Edita el archivo SDKConstants.swift para Swift o el archivo SDKDemoAPIKey.h para Objective-C y pega tu clave de API en la definición de la constante apiKey o kAPIKey. Por ejemplo:
Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
staticNSString*constkAPIKey=@"YOUR_API_KEY";
En el archivo SDKConstants.swift (Swift) o en el archivo SDKDemoAPIKey.h (Objective-C), quita la siguiente línea, ya que se usa para registrar el problema definido por el usuario:
Swift
#error (Register for API Key and insert here. Then delete this line.)
Objective-C
#error Register for API Key and insert here.
Compila y ejecuta el proyecto. Aparecerá la ventana del simulador de iOS, que muestra una lista de demostraciones del SDK de Maps.
Elige una de las opciones que se muestran para experimentar con una función del SDK de Maps para iOS.
Si se te solicita que permitas que GoogleMapsDemos acceda a tu ubicación, elige Permitir.
[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Falta la información que necesito","missingTheInformationINeed","thumb-down"],["Muy complicado o demasiados pasos","tooComplicatedTooManySteps","thumb-down"],["Desactualizado","outOfDate","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Problema con las muestras o los códigos","samplesCodeIssue","thumb-down"],["Otro","otherDown","thumb-down"]],["Última actualización: 2025-09-05 (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/86408feffd008565cd2cafce8aff3dc27f1f41bb/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/86408feffd008565cd2cafce8aff3dc27f1f41bb/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**."]]