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
Swift
import GoogleMaps import UIKit class MyLocationViewController: UIViewController { private let cameraLatitude: CLLocationDegrees = -33.868 private let cameraLongitude: CLLocationDegrees = 151.2086 private let cameraZoom: Float = 12 lazy var mapView: GMSMapView = { let camera = GMSCameraPosition( latitude: cameraLatitude, longitude: cameraLongitude, zoom: cameraZoom) return GMSMapView(frame: .zero, camera: camera) }() var observation: NSKeyValueObservation? var location: CLLocation? { didSet { guard oldValue == nil, let firstLocation = location else { return } mapView.camera = GMSCameraPosition(target: firstLocation.coordinate, zoom: 14) } } override func viewDidLoad() { super.viewDidLoad() mapView.delegate = self mapView.settings.compassButton = true mapView.settings.myLocationButton = true mapView.isMyLocationEnabled = true view = mapView // Listen to the myLocation property of GMSMapView. observation = mapView.observe(\.myLocation, options: [.new]) { [weak self] mapView, _ in self?.location = mapView.myLocation } } deinit { observation?.invalidate() } } extension MyLocationViewController: GMSMapViewDelegate { func mapView(_ mapView: GMSMapView, didTapMyLocation location: CLLocationCoordinate2D) { let alert = UIAlertController( title: "Location Tapped", message: "Current location: <\(location.latitude), \(location.longitude)>", preferredStyle: .alert) alert.addAction(UIAlertAction(title: "OK", style: .default)) present(alert, animated: true) } }
Objective-C
#import "GoogleMapsDemos/Samples/MyLocationViewController.h" #import <GoogleMaps/GoogleMaps.h> @implementation MyLocationViewController { GMSMapView *_mapView; BOOL _firstLocationUpdate; } - (void)viewDidLoad { [super viewDidLoad]; GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868 longitude:151.2086 zoom:12]; _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera]; _mapView.delegate = self; _mapView.settings.compassButton = YES; _mapView.settings.myLocationButton = YES; // Listen to the myLocation property of GMSMapView. [_mapView addObserver:self forKeyPath:@"myLocation" options:NSKeyValueObservingOptionNew context:NULL]; self.view = _mapView; // Ask for My Location data after the map has already been added to the UI. GMSMapView *mapView = _mapView; dispatch_async(dispatch_get_main_queue(), ^{ mapView.myLocationEnabled = YES; }); } - (void)mapView:(GMSMapView *)mapView didTapMyLocation:(CLLocationCoordinate2D)location { NSString *message = [NSString stringWithFormat:@"My Location Dot Tapped at: [lat: %f, lng: %f]", location.latitude, location.longitude]; UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Location Tapped" message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ }]; [alertController addAction:okAction]; [self presentViewController:alertController animated:YES completion:nil]; } - (void)dealloc { [_mapView removeObserver:self forKeyPath:@"myLocation" context:NULL]; } #pragma mark - KVO updates - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if (!_firstLocationUpdate) { // If the first location update has not yet been received, then jump to that location. _firstLocationUpdate = YES; CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey]; _mapView.camera = [GMSCameraPosition cameraWithTarget:location.coordinate zoom:14]; } } @end
在本地运行完整示例应用
Maps SDK for iOS 示例应用可从 GitHub 下载为下载归档文件。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，将示例代码库克隆到本地目录中。 打开终端窗口，导航到克隆示例文件的目录，然后深入到 GoogleMaps 目录：
Swift
cd maps-sdk-for-ios-samples/GoogleMaps-Swift
open GoogleMapsSwiftXCFrameworkDemos.xcodeprojObjective-C
cd maps-sdk-for-ios-samples-main/GoogleMaps
open GoogleMapsDemos.xcodeproj- 在 Xcode 项目中，依次前往 File > Add Package Dependencies。 输入
https://github.com/googlemaps/ios-maps-sdk作为网址，按 Enter 键拉取软件包，然后点击 Add Package。 - 在 Xcode 中，按编译按钮以使用当前方案构建应用。构建会产生错误，提示您在
SDKConstants.swift文件（适用于 Swift）或SDKDemoAPIKey.h文件（适用于 Objective-C）中输入 API 密钥。 - 从已启用 Maps SDK for iOS 的项目中获取 API 密钥。
- 修改 Swift 的
SDKConstants.swift文件或 Objective-C 的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，因为该行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。系统会显示 iOS 模拟器窗口，其中包含 Maps SDK 演示的列表。
- 选择显示的选项之一，以试用 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。