開始使用
請務必先設定開發環境,再試用程式碼範例。詳情請參閱 Maps SDK for iOS 程式碼範例。
查看程式碼
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
在本機執行完整的範例應用程式
您可以從 GitHub 下載封存檔,取得 Maps SDK for iOS 範例應用程式。請按照下列步驟安裝及試用 Maps SDK for iOS 範例應用程式。
- 執行
git clone https://github.com/googlemaps-samples/maps-sdk-for-ios-samples.git
將範例存放區複製到本機目錄。 開啟終端機視窗,前往複製範例檔案的目錄,然後深入 GoogleMaps 目錄:
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 中按下編譯按鈕,即可使用目前的配置建構應用程式。建構作業會產生錯誤,提示您在
SDKConstants.swift
檔案 (Swift) 或SDKDemoAPIKey.h
檔案 (Objective-C) 中輸入 API 金鑰。 - 如果您還沒有 API 金鑰,請按照操作說明在 Google Cloud 控制台中設定專案並取得 API 金鑰。在 Cloud 控制台中設定金鑰時,您可以限制金鑰,只允許範例應用程式的軟體包 ID 使用金鑰,確保只有您的應用程式可以使用金鑰。SDK 範例應用程式的預設套件 ID 為
com.example.GoogleMapsDemos
。 - 編輯 Swift 或
SDKDemoAPIKey.h
檔案的SDKConstants.swift
檔案,用於 Objective-C,然後將 API 金鑰貼到apiKey
或kAPIKey
常數的定義中。例如:Swift
static let apiKey = "YOUR_API_KEY"
Objective-C
static NSString *const kAPIKey = @"YOUR_API_KEY";
- 在
SDKConstants.swift
檔案 (Swift) 或SDKDemoAPIKey.h
檔案 (Objective-C) 中,移除以下這行程式碼,因為這一行用於登錄使用者定義的問題:Swift
#error (Register for API Key and insert here. Then delete this line.)
Objective-C
#error Register for API Key and insert here.
- 建構並執行專案。iOS 模擬器視窗隨即顯示 Maps SDK 示範清單。
- 選擇其中一個顯示的選項,即可試用 Maps SDK for iOS 的功能。
- 如果系統提示您允許 GoogleMapsDemos 存取您的位置,請選擇「允許」。