启用“我的位置”按钮
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。

我的位置按钮会显示在地图视图的右下角。当用户点按该按钮时,地图会平移到用户的当前位置。
开始使用
您必须先配置开发环境,然后才能试用该示例代码。如需了解详情,请参阅 Maps SDK for iOS 代码示例。
查看代码
在本地运行完整示例应用
Maps SDK for iOS 示例应用以GitHub 上的下载归档文件的形式提供。请按照以下步骤安装并试用 Maps SDK for iOS 示例应用。
- 运行
git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git
以将示例代码库克隆到本地目录。
打开一个终端窗口,导航到您克隆示例文件的目录,然后展开 GoogleMaps 目录:
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
- 在 Xcode 中,按下“编译”按钮,使用当前方案构建应用。构建会产生错误,提示您在 Swift 的
SDKConstants.swift
文件或 Objective-C 的 SDKDemoAPIKey.h
文件中输入 API 密钥。
- 从已启用 Maps SDK for iOS 的项目中获取 API 密钥。
- 针对 Swift 修改
SDKConstants.swift
文件,针对 Objective-C 修改 SDKDemoAPIKey.h
文件,然后将您的 API 密钥粘贴到 apiKey
或 kAPIKey
常量的定义中。例如:
Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
static NSString *const kAPIKey = @"YOUR_API_KEY";
- 在
SDKConstants.swift
文件 (Swift) 或 SDKDemoAPIKey.h
文件 (Objective-C) 中,移除以下行,因为它用于注册用户定义的问题:
Swift
#error (Register for API Key and insert here. Then delete this line.)
Objective-C
#error Register for API Key and insert here.
- 构建并运行项目。系统随即会显示 iOS 模拟器窗口,其中列出了 Maps SDK 演示版。
- 选择显示的选项之一,以便试用 Maps SDK for iOS 的某项功能。
- 如果系统提示您允许 GoogleMapsDemos 访问您的位置信息,请选择允许。
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-08-31。
[null,null,["最后更新时间 (UTC):2025-08-31。"],[[["\u003cp\u003eThe "My Location" button, located in the bottom right corner of the map, centers the map on the user's current location when tapped.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code samples (Swift and Objective-C) demonstrate how to implement the "My Location" functionality within a map view.\u003c/p\u003e\n"],["\u003cp\u003eTo run the sample code, you'll need to configure your development environment, including obtaining and integrating a Google Maps API key.\u003c/p\u003e\n"],["\u003cp\u003eThe full sample app can be downloaded and explored to experiment with various features of the Maps SDK for iOS.\u003c/p\u003e\n"]]],["The content describes implementing a \"My Location\" feature in a map view using the Google Maps SDK for iOS. When enabled, a button appears, allowing the user to center the map on their current location upon tapping. The code examples show how to set up the map, enable the \"My Location\" button and feature, and observe changes to the user's location. Additionally, it details setting up a project and API key. It also describes setting up a tap handler on the current user's location in the map.\n"],null,["The **My Location** button is displayed in the bottom right corner of the map view. When the user taps the button, the map pans to the user's current location.\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 MyLocationViewController: UIViewController {\n\n private let cameraLatitude: CLLocationDegrees = -33.868\n\n private let cameraLongitude: CLLocationDegrees = 151.2086\n\n private let cameraZoom: Float = 12\n\n lazy var mapView: GMSMapView = {\n let camera = GMSCameraPosition(\n latitude: cameraLatitude, longitude: cameraLongitude, zoom: cameraZoom)\n return GMSMapView(frame: .zero, camera: camera)\n }()\n\n var observation: NSKeyValueObservation?\n var location: CLLocation? {\n didSet {\n guard oldValue == nil, let firstLocation = location else { return }\n mapView.camera = GMSCameraPosition(target: firstLocation.coordinate, zoom: 14)\n }\n }\n\n override func viewDidLoad() {\n super.viewDidLoad()\n\n mapView.delegate = self\n mapView.settings.compassButton = true\n mapView.settings.myLocationButton = true\n mapView.isMyLocationEnabled = true\n view = mapView\n\n // Listen to the myLocation property of GMSMapView.\n observation = mapView.observe(\\.myLocation, options: [.new]) {\n [weak self] mapView, _ in\n self?.location = mapView.myLocation\n }\n }\n\n deinit {\n observation?.invalidate()\n }\n}\n\nextension MyLocationViewController: GMSMapViewDelegate {\n func mapView(_ mapView: GMSMapView, didTapMyLocation location: CLLocationCoordinate2D) {\n let alert = UIAlertController(\n title: \"Location Tapped\",\n message: \"Current location: \u003c\\(location.latitude), \\(location.longitude)\u003e\",\n preferredStyle: .alert)\n alert.addAction(UIAlertAction(title: \"OK\", style: .default))\n present(alert, animated: true)\n }\n}https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps-Swift/GoogleMapsSwiftDemos/Swift/Samples/MyLocationViewController.swift#L14-L69\n \n```\n\nObjective-C \n\n```objective-c\n#import \"GoogleMapsDemos/Samples/MyLocationViewController.h\"\n\n#import \u003cGoogleMaps/GoogleMaps.h\u003e\n\n@implementation MyLocationViewController {\n GMSMapView *_mapView;\n BOOL _firstLocationUpdate;\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 _mapView.settings.compassButton = YES;\n _mapView.settings.myLocationButton = YES;\n\n // Listen to the myLocation property of GMSMapView.\n [_mapView addObserver:self\n forKeyPath:@\"myLocation\"\n options:NSKeyValueObservingOptionNew\n context:NULL];\n\n self.view = _mapView;\n\n // Ask for My Location data after the map has already been added to the UI.\n GMSMapView *mapView = _mapView;\n dispatch_async(dispatch_get_main_queue(), ^{\n mapView.myLocationEnabled = YES;\n });\n}\n\n- (void)mapView:(GMSMapView *)mapView didTapMyLocation:(CLLocationCoordinate2D)location {\n NSString *message = [NSString stringWithFormat:@\"My Location Dot Tapped at: [lat: %f, lng: %f]\",\n location.latitude, location.longitude];\n UIAlertController *alertController =\n [UIAlertController alertControllerWithTitle:@\"Location Tapped\"\n message:message\n preferredStyle:UIAlertControllerStyleAlert];\n UIAlertAction *okAction = [UIAlertAction actionWithTitle:@\"OK\"\n style:UIAlertActionStyleDefault\n handler:^(UIAlertAction *action){\n }];\n [alertController addAction:okAction];\n [self presentViewController:alertController animated:YES completion:nil];\n}\n\n- (void)dealloc {\n [_mapView removeObserver:self forKeyPath:@\"myLocation\" context:NULL];\n}\n\n#pragma mark - KVO updates\n\n- (void)observeValueForKeyPath:(NSString *)keyPath\n ofObject:(id)object\n change:(NSDictionary *)change\n context:(void *)context {\n if (!_firstLocationUpdate) {\n // If the first location update has not yet been received, then jump to that location.\n _firstLocationUpdate = YES;\n CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey];\n _mapView.camera = [GMSCameraPosition cameraWithTarget:location.coordinate zoom:14];\n }\n}\n\n@end \nhttps://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps/GoogleMapsDemos/Samples/MyLocationViewController.m#L16-L84\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**."]]