无法在谷歌地图上获得当前位置（GPS）ios sdk

Question

我的目标是将相机移动到用户的当前位置，但是为了某种方式它不断显示一般地图，我尝试了很多东西，但似乎它不会移动到用户的当前位置

截图

目前的代码

import UIKit
import GoogleMaps


class ParcelViewController: UIViewController, GMSMapViewDelegate {


    @IBOutlet var mapView: GMSMapView!

    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()
        locationManager.delegate = self
        locationManager.requestWhenInUseAuthorization()
        mapView.delegate = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}


// Mark: -CLLocationManagerDelegate
extension ParcelViewController: CLLocationManagerDelegate {

    func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        if status == .AuthorizedWhenInUse {
            locationManager.startUpdatingLocation()

            mapView.myLocationEnabled = true
            mapView.settings.myLocationButton = true
        }
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        if let location = locations.first {
            mapView.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)

            locationManager.stopUpdatingLocation()

        }
    }
}

Answer 1

您是否在.plist文件中添加了NSLocationAlwaysUsageDescription或NSLocationWhenInUseUsageDescription （在您的情况下就是这一个）键。 因为如果要求授权的警报视图未显示，则可能是问题所在。

Answer 2

确保您已正确导入并注册了GoogleMapsAPI密钥：这是在AppDelegate中完成的

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    GMSServices.provideAPIKey("[your key from Google API]")

    return true
}

之后，在ViewController文件中的一些加载函数中：

let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)      
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1))
self.map.setRegion(region, animated: true)

请注意：Google Maps API不需要用户自动化来使用地图，但CLLLocationManager也是如此。 在加载时，您应该检查是否设置了权限，然后从那里开始。

Answer 3

首先，您需要设置以下基本步骤：

第1步：将其导入您的控制器类

import CoreLocation

第2步：将此委托添加到您的类文件中

class Your_controller: CLLocationManagerDelegate

第3步：声明以上内容以查看负载

var locationManager = CLLocationManager()

第4步：将此代码添加到viewdidload方法

locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()


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")
}

第5步：在viewdidload方法下添加此代码

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(zoomLevel))
    self.mapView.animate(to: camera)

}

第6步：添加权限您的plist文件

密钥 - “隐私 - 使用时的位置使用说明”

价值 - “此应用需要访问您的位置”

第7步：在硬件设备上运行您的应用程序

步骤8：当您想要显示当前位置时，只需调用此方法即可。

self.showCurrentLocation()