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 // Sample code for GeoCoder service. class GeocoderViewController: UIViewController { private lazy var mapView: GMSMapView = { let camera = GMSCameraPosition(latitude: -33.868, longitude: 151.2086, zoom: 12) return GMSMapView(frame: .zero, camera: camera) }() private lazy var geocoder = GMSGeocoder() override func loadView() { view = mapView mapView.delegate = self } } extension GeocoderViewController: GMSMapViewDelegate { func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) { // On a long press, reverse geocode this location. geocoder.reverseGeocodeCoordinate(coordinate) { response, error in guard let address = response?.firstResult() else { let errorMessage = error.map { String(describing: $0) } ?? "<no error>" print( "Could not reverse geocode point (\(coordinate.latitude), \(coordinate.longitude)): \(errorMessage)" ) return } print("Geocoder result: \(address)") let marker = GMSMarker(position: address.coordinate) marker.appearAnimation = .pop marker.map = mapView guard let lines = address.lines, let title = lines.first else { return } marker.title = title if lines.count > 1 { marker.snippet = lines[1] } } } }
Objective-C
#import "GoogleMapsDemos/Samples/GeocoderViewController.h" #import <GoogleMaps/GoogleMaps.h> @implementation GeocoderViewController { GMSMapView *_mapView; GMSGeocoder *_geocoder; } - (void)viewDidLoad { [super viewDidLoad]; GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868 longitude:151.2086 zoom:12]; _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera]; _mapView.delegate = self; _geocoder = [[GMSGeocoder alloc] init]; self.view = _mapView; } - (void)mapView:(GMSMapView *)mapView didLongPressAtCoordinate:(CLLocationCoordinate2D)coordinate { // On a long press, reverse geocode this location. __weak __typeof__(self) weakSelf = self; GMSReverseGeocodeCallback handler = ^(GMSReverseGeocodeResponse *response, NSError *error) { [weakSelf handleResponse:response coordinate:coordinate error:error]; }; [_geocoder reverseGeocodeCoordinate:coordinate completionHandler:handler]; } - (void)handleResponse:(nullable GMSReverseGeocodeResponse *)response coordinate:(CLLocationCoordinate2D)coordinate error:(nullable NSError *)error { GMSAddress *address = response.firstResult; if (address) { NSLog(@"Geocoder result: %@", address); GMSMarker *marker = [GMSMarker markerWithPosition:address.coordinate]; NSArray<NSString *> *lines = [address lines]; marker.title = [lines firstObject]; if (lines.count > 1) { marker.snippet = [lines objectAtIndex:1]; } marker.appearAnimation = kGMSMarkerAnimationPop; marker.map = _mapView; } else { NSLog(@"Could not reverse geocode point (%f,%f): %@", coordinate.latitude, coordinate.longitude, error); } } @end
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,前往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 compile 按钮使用当前架构构建应用。构建引发错误,提示您在 Swift 的
SDKConstants.swift
文件或 Objective-C 的SDKDemoAPIKey.h
文件中输入 API 密钥。 - 如果您尚未获得 API 密钥,请按照说明在 Google Cloud 控制台中设置项目并获取 API 密钥。在 Cloud 控制台中配置密钥时,您可以将密钥限制为示例应用的软件包标识符,以确保只有您的应用可以使用该密钥。SDK 示例应用的默认 bundle 标识符为
com.example.GoogleMapsDemos
。 - 针对 Swift 编辑
SDKConstants.swift
文件,针对 Objective-C 编辑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。出现 iOS 模拟器窗口,显示 Maps SDK 演示应用列表。
- 从显示的选项中选择其一,对 Maps SDK for iOS 的其中一项功能进行试验。
- 如果系统提示您允许 GoogleMapsDemos 获取您的位置信息,请选择允许。