向地图添加标记

此示例显示了一张地图，其中在澳大利亚悉尼和墨尔本上有标记图钉。

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 adding a marker.
class MarkersViewController: UIViewController {
  private lazy var sydneyMarker = GMSMarker(
    position: CLLocationCoordinate2D(latitude: -33.8683, longitude: 151.2086))

  private lazy var melbourneMarker = GMSMarker(
    position: CLLocationCoordinate2D(latitude: -37.81969, longitude: 144.966085))

  private lazy var mapView: GMSMapView = {
    let camera = GMSCameraPosition(latitude: -37.81969, longitude: 144.966085, zoom: 4)
    return GMSMapView(frame: .zero, camera: camera)
  }()

  override func loadView() {
    view = mapView

    sydneyMarker.title = "Sydney"
    sydneyMarker.snippet = "Population: 4,605,992"
    sydneyMarker.isFlat = false
    sydneyMarker.rotation = 30
    print("sydneyMarker: \(sydneyMarker)")

    let australiaMarker = GMSMarker(
      position: CLLocationCoordinate2D(latitude: -27.994401, longitude: 140.07019))
    australiaMarker.title = "Australia"
    australiaMarker.appearAnimation = .pop
    australiaMarker.isFlat = true
    australiaMarker.isDraggable = true
    australiaMarker.groundAnchor = CGPoint(x: 0.5, y: 0.5)
    australiaMarker.icon = UIImage(named: "australia")
    australiaMarker.map = mapView

    mapView.selectedMarker = sydneyMarker
    navigationItem.rightBarButtonItem = UIBarButtonItem(
      barButtonSystemItem: .add, target: self, action: #selector(tapAdd))
  }

  @objc func tapAdd() {
    if sydneyMarker.map == nil {
      sydneyMarker.map = mapView
    } else {
      sydneyMarker.map = nil
    }
    melbourneMarker.title = "Melbourne"
    melbourneMarker.snippet = "Population: 4,169,103"
    melbourneMarker.map = mapView
  }
}
MarkersViewController.swift
      

Objective-C

#import "GoogleMapsDemos/Samples/MarkersViewController.h"

#import <GoogleMaps/GoogleMaps.h>

@implementation MarkersViewController {
  GMSMarker *_sydneyMarker;
  GMSMarker *_melbourneMarker;
  GMSMarker *_fadeInMarker;
}

- (void)viewDidLoad {
  [super viewDidLoad];
  GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-37.81969
                                                          longitude:144.966085
                                                               zoom:4];
  GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];

  _sydneyMarker = [[GMSMarker alloc] init];
  _sydneyMarker.title = @"Sydney";
  _sydneyMarker.snippet = @"Population: 4,605,992";
  _sydneyMarker.position = CLLocationCoordinate2DMake(-33.8683, 151.2086);
  _sydneyMarker.flat = NO;
  _sydneyMarker.rotation = 30.0;
  NSLog(@"sydneyMarker: %@", _sydneyMarker);

  GMSMarker *australiaMarker = [[GMSMarker alloc] init];
  australiaMarker.title = @"Australia";
  australiaMarker.position = CLLocationCoordinate2DMake(-27.994401, 140.07019);
  australiaMarker.appearAnimation = kGMSMarkerAnimationPop;
  australiaMarker.flat = YES;
  australiaMarker.draggable = YES;
  australiaMarker.groundAnchor = CGPointMake(0.5, 0.5);
  australiaMarker.icon = [UIImage imageNamed:@"australia"];
  australiaMarker.map = mapView;

  _fadeInMarker = [[GMSMarker alloc] init];
  _fadeInMarker.title = @"Australia";
  _fadeInMarker.position = CLLocationCoordinate2DMake(-29.9959, 145.0719);
  _fadeInMarker.appearAnimation = kGMSMarkerAnimationFadeIn;
  _fadeInMarker.icon = [UIImage imageNamed:@"australia"];

  // Set the marker in Sydney to be selected
  mapView.selectedMarker = _sydneyMarker;

  self.view = mapView;
  self.navigationItem.rightBarButtonItem =
      [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
                                                    target:self
                                                    action:@selector(didTapAdd)];
}

- (void)didTapAdd {
  if (_sydneyMarker.map == nil) {
    _sydneyMarker.map = (GMSMapView *)self.view;
  } else {
    _sydneyMarker.map = nil;
  }

  _melbourneMarker.map = nil;
  _melbourneMarker = [[GMSMarker alloc] init];
  _melbourneMarker.title = @"Melbourne";
  _melbourneMarker.snippet = @"Population: 4,169,103";
  _melbourneMarker.position = CLLocationCoordinate2DMake(-37.81969, 144.966085);
  _melbourneMarker.map = (GMSMapView *)self.view;

  if (_fadeInMarker.map) {
    _fadeInMarker.map = nil;
  } else {
    _fadeInMarker.map = (GMSMapView *)self.view;
  }
}

@end
MarkersViewController.m
      

在本地运行完整示例应用

Maps SDK for iOS 示例应用以下载归档文件的形式从 GitHub 提供。请按照以下步骤安装并试用 Maps SDK for iOS 示例应用。

1. 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。

2. 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

3. 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。
4. 如果您还没有 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 示例应用的默认软件包标识符为 com.example.GoogleMapsDemos。
5. 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";

6. 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.

7. 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。
8. 选择显示的选项之一，以便试用 Maps SDK for iOS 的某项功能。
9. 如果系统提示您允许 GoogleMapsDemos 访问您的位置信息，请选择允许。