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我是 swift 的初学者，并为我们的食谱应用程序实施适用于 iOS 的 Google Maps SDK。它具有像这样显示当前位置附近的超市的功能。

我的应用程序需要在我的应用程序地图中显示多个标记，指示超市在当前位置附近的位置，但我不知道如何申请获取当前位置附近的超市位置。

我正在关注本教程。 https://www.raywenderlich.com/197-google-maps-ios-sdk-tutorial-getting-started

有一些问题。1.原来，这种方式可以实现我想要的吗？我怀疑本教程的方式是否可以做到，因为我认为本教程应该是旧的。2. 显示错误 Use of undeclared type 'GooglePlace

import UIKit
import GoogleMaps

class PlaceMarker: GMSMarker {
    // 1
    let place: GooglePlace

    // 2
    init(place: GooglePlace) {
      self.place = place
      super.init()

      position = place.coordinate
      groundAnchor = CGPoint(x: 0.5, y: 1)
      appearAnimation = .pop
    }
}
  1. 使用未解析的标识符“GoogleDataProvider”

import UIKit
import CoreLocation
import GoogleMaps

class MapViewController: UIViewController {
    var mapView: GMSMapView!

    private let locationManager = CLLocationManager()

    private let dataProvider = GoogleDataProvider()
    private let searchRadius: Double = 1000


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        //        locationManager.delegate = self as? CLLocationManagerDelegate
        //        locationManager.requestWhenInUseAuthorization()
        //        mapView.delegate = self as? GMSMapViewDelegate
        //
        if CLLocationManager.locationServicesEnabled() {
            locationManager.delegate = self as! CLLocationManagerDelegate
            locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            locationManager.requestWhenInUseAuthorization()
            locationManager.startUpdatingLocation()
        }
        let camera = GMSCameraPosition.camera(withLatitude: locationManager.location!.coordinate.latitude, longitude: locationManager.location!.coordinate.longitude, zoom: 15);
        mapView = GMSMapView.map(withFrame: self.view.bounds, camera: camera)
        mapView.delegate = self as! GMSMapViewDelegate
        self.view.addSubview(mapView)
        mapView.settings.myLocationButton = true
        mapView.isMyLocationEnabled = true

        mapView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            mapView.topAnchor.constraint(equalTo: view.topAnchor),
            mapView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            mapView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            mapView.trailingAnchor.constraint(equalTo: view.trailingAnchor)
        ])


        if CLLocationManager.locationServicesEnabled() {
            switch (CLLocationManager.authorizationStatus()) {
            case .notDetermined, .restricted, .denied:
                print("No access")
            case .authorizedAlways, .authorizedWhenInUse:
                print("Access")
            }
        } else {
            print("Location services are not enabled")
        }
    }

    func showCurrentLocation() {
        mapView.settings.myLocationButton = true
        let locationObj = locationManager.location as! CLLocation
        let coord = locationObj.coordinate
        let lattitude = coord.latitude
        let longitude = coord.longitude
        print(" lat in  updating \(lattitude) ")
        print(" long in  updating \(longitude)")

        let center = CLLocationCoordinate2D(latitude: locationObj.coordinate.latitude, longitude: locationObj.coordinate.longitude)
        let marker = GMSMarker()
        marker.position = center
        marker.title = "current location"
        marker.map = mapView
        //let camera: GMSCameraPosition = GMSCameraPosition.camera(withLatitude: lattitude, longitude: longitude, zoom: Float(5))
        //self.mapView.animate(to: camera)
        //        mapView = GMSMapView.map(withFrame: CGRect.zero, camera: camera)
    }




    /*
     // MARK: - Navigation

     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     // Get the new view controller using segue.destination.
     // Pass the selected object to the new view controller.
     }
     */

}


extension MapViewController: GMSMapViewDelegate {

}

extension MapViewController: CLLocationManagerDelegate {
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        guard status == .authorizedWhenInUse else {
            return
        }

        locationManager.startUpdatingLocation()
        mapView.isMyLocationEnabled = true
        mapView.settings.myLocationButton = true
        self.showCurrentLocation()

    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let location = locations.first else {
            return
        }
        mapView.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)
        locationManager.stopUpdatingLocation()
        self.showCurrentLocation()
    }
}

斯威夫特 5 Xcode 11.3

我感谢并欢迎任何帮助。非常感谢。

添加

我在另一个网站上问了同样的问题并得到了答案“你可以在函数下面制作这部分。如果你将位置和标题作为参数传递给这个函数并重复，你可以部署标记”

let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude: -33.86, longitude: 151.20)
marker.title = "Sydney"
marker.snippet = "Australia"
marker.map = mapView

但我完全不知道如何获得超市的位置。我是否需要使用 json 或 Google Place API 或更多？为了实现他的想法，我想需要得到纬度和经度。我现在很困惑......

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