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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」一文。
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並試用 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,然後深入瞭解 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 Swift 的
SDKConstants.swift
檔案或 Objective-C 的 SDKDemoAPIKey.h
檔案中輸入 API 金鑰。
- 從已啟用 Maps SDK for iOS 的專案取得 API 金鑰。
- 編輯 Swift 的
SDKConstants.swift
檔案或 Objective-C 的 SDKDemoAPIKey.h
檔案,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,移除下列程式碼行,因為這行是用來註冊使用者定義的問題:
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,列出 Maps SDK 範例。
- 選擇顯示的其中一個選項,即可試用 Maps SDK for iOS 的功能。
- 如果系統提示允許 GoogleMapsDemos 存取您的位置資訊,請選擇「允許」。
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間:2025-08-31 (世界標準時間)。
[null,null,["上次更新時間:2025-08-31 (世界標準時間)。"],[[["\u003cp\u003eThis code demonstrates reverse geocoding, converting coordinates to a human-readable address when a user long-presses a location on a Google Map.\u003c/p\u003e\n"],["\u003cp\u003eUpon a long press, a marker with an info window displaying the address is placed on the map at the specified coordinates.\u003c/p\u003e\n"],["\u003cp\u003eTo run the code, you need to configure your development environment with the Maps SDK for iOS and obtain a Google Maps API key.\u003c/p\u003e\n"],["\u003cp\u003eThe sample app provides various demos showcasing different features of the Maps SDK for iOS, accessible after building and running the project.\u003c/p\u003e\n"]]],["Upon a long press on the map, the gesture's coordinates are sent to the reverse geocoding service. A successful response results in a marker being added to the map at that location. The marker's info window then displays the address obtained from the service. The marker's title shows the first line of the address and the marker snippet displays the second line of the address if present.\n"],null,["**European Economic Area (EEA) developers** If your billing address is in the European Economic Area, effective on 8 July 2025, the [Google Maps Platform EEA Terms of Service](https://cloud.google.com/terms/maps-platform/eea) will apply to your use of the Services. Functionality varies by region. [Learn more](/maps/comms/eea/faq).\n\nWhen the map is long pressed, the coordinates of the gesture are sent to the reverse geocoding service. If successful, a marker with an info window containing the result is added to the map.\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\n// Sample code for GeoCoder service.\nclass GeocoderViewController: UIViewController {\n\n private lazy var mapView: GMSMapView = {\n let camera = GMSCameraPosition(latitude: -33.868, longitude: 151.2086, zoom: 12)\n return GMSMapView(frame: .zero, camera: camera)\n }()\n\n private lazy var geocoder = GMSGeocoder()\n\n override func loadView() {\n view = mapView\n mapView.delegate = self\n }\n}\n\nextension GeocoderViewController: GMSMapViewDelegate {\n func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {\n // On a long press, reverse geocode this location.\n geocoder.reverseGeocodeCoordinate(coordinate) { response, error in\n guard let address = response?.firstResult() else {\n let errorMessage = error.map { String(describing: $0) } ?? \"\u003cno error\u003e\"\n print(\n \"Could not reverse geocode point (\\(coordinate.latitude), \\(coordinate.longitude)): \\(errorMessage)\"\n )\n return\n }\n print(\"Geocoder result: \\(address)\")\n let marker = GMSMarker(position: address.coordinate)\n marker.appearAnimation = .pop\n marker.map = mapView\n\n guard let lines = address.lines, let title = lines.first else { return }\n marker.title = title\n if lines.count \u003e 1 {\n marker.snippet = lines[1]\n }\n }\n }\n}https://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps-Swift/GoogleMapsSwiftDemos/Swift/Samples/GeocoderViewController.swift#L14-L56\n \n```\n\nObjective-C \n\n```objective-c\n#import \"GoogleMapsDemos/Samples/GeocoderViewController.h\"\n\n#import \u003cGoogleMaps/GoogleMaps.h\u003e\n\n@implementation GeocoderViewController {\n GMSMapView *_mapView;\n GMSGeocoder *_geocoder;\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\n _geocoder = [[GMSGeocoder alloc] init];\n\n self.view = _mapView;\n}\n\n- (void)mapView:(GMSMapView *)mapView didLongPressAtCoordinate:(CLLocationCoordinate2D)coordinate {\n // On a long press, reverse geocode this location.\n __weak __typeof__(self) weakSelf = self;\n GMSReverseGeocodeCallback handler = ^(GMSReverseGeocodeResponse *response, NSError *error) {\n [weakSelf handleResponse:response coordinate:coordinate error:error];\n };\n [_geocoder reverseGeocodeCoordinate:coordinate completionHandler:handler];\n}\n\n- (void)handleResponse:(nullable GMSReverseGeocodeResponse *)response\n coordinate:(CLLocationCoordinate2D)coordinate\n error:(nullable NSError *)error {\n GMSAddress *address = response.firstResult;\n if (address) {\n NSLog(@\"Geocoder result: %@\", address);\n\n GMSMarker *marker = [GMSMarker markerWithPosition:address.coordinate];\n NSArray\u003cNSString *\u003e *lines = [address lines];\n\n marker.title = [lines firstObject];\n if (lines.count \u003e 1) {\n marker.snippet = [lines objectAtIndex:1];\n }\n\n marker.appearAnimation = kGMSMarkerAnimationPop;\n marker.map = _mapView;\n } else {\n NSLog(@\"Could not reverse geocode point (%f,%f): %@\", coordinate.latitude, coordinate.longitude,\n error);\n }\n}\n\n@end \nhttps://github.com/googlemaps-samples/maps-sdk-for-ios-samples/blob/86408feffd008565cd2cafce8aff3dc27f1f41bb/GoogleMaps/GoogleMapsDemos/Samples/GeocoderViewController.m#L16-L71\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**."]]