ios 使用 swift 在 Google 地图中的当前位置

Current Location in Google Maps with swift

提问by Gyro Technologies

I'm trying to display the user's current location on a google map but in the case below, the map doesn't even get displayed. What should I change to fix this?

我试图在谷歌地图上显示用户的当前位置，但在下面的情况下，地图甚至没有显示。我应该改变什么来解决这个问题？

var locationManager = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    //user location stuff
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation()
}

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
    print("Error" + error.description)
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let userLocation = locations.last
    let center = CLLocationCoordinate2D(latitude: userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude)

    let camera = GMSCameraPosition.cameraWithLatitude(userLocation!.coordinate.latitude,
        longitude: userLocation!.coordinate.longitude, zoom: 8)
    let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
    mapView.myLocationEnabled = true
    self.view = mapView

    let marker = GMSMarker()
    marker.position = center
    marker.title = "Current Location"
    marker.snippet = "XXX"
    marker.map = mapView

    locationManager.stopUpdatingLocation()
}

回答by Gangireddy Rami Reddy

You can try this bellow code its working fine

你可以试试这个波纹管代码它的工作正常

import UIKit
import GoogleMaps
import GooglePlaces

class SearchMapsViewController: UIViewController,
     UINavigationBarDelegate, GMSAutocompleteFetcherDelegate, 
     LocateOnTheMap, UISearchBarDelegate, CLLocationManagerDelegate 
{

   @IBOutlet var googleMapsContainerView: UIView!
   var searchResultController: SearchResultsController!
   var resultsArray = [String]()
   var googleMapsView:GMSMapView!
   var gmsFetcher: GMSAutocompleteFetcher!
   var locationManager = CLLocationManager()

override func viewDidAppear(animated: Bool) {        
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation()

    self.googleMapsView = GMSMapView (frame: self.googleMapsContainerView.frame)
    self.googleMapsView.settings.compassButton = true
    self.googleMapsView.myLocationEnabled = true
    self.googleMapsView.settings.myLocationButton = true
    self.view.addSubview(self.googleMapsView)
    searchResultController = SearchResultsController()
    searchResultController.delegate = self
    gmsFetcher = GMSAutocompleteFetcher()
    gmsFetcher.delegate = self
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) 
{
    print("Error" + error.description)
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 
{
    let userLocation = locations.last
    let center = CLLocationCoordinate2D(latitude: userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude)

    let camera = GMSCameraPosition.cameraWithLatitude(userLocation!.coordinate.latitude, longitude: userLocation!.coordinate.longitude, zoom: 15);
    self.googleMapsView.camera = camera
    self.googleMapsView.myLocationEnabled = true

    let marker = GMSMarker(position: center)

    print("Latitude :- \(userLocation!.coordinate.latitude)")
    print("Longitude :-\(userLocation!.coordinate.longitude)")
    marker.map = self.googleMapsView

    marker.title = "Current Location"
    locationManager.stopUpdatingLocation()
}

回答by masoud

do requier setting on infoPlist and then try this

在 infoPlist 上做更需要的设置，然后试试这个

@IBOutlet weak var your "name of view which show map": GMSMapView!

override func viewDidLoad(){
        super.viewDidLoad()

  placesClient = GMSPlacesClient.shared()
  locationManager.requestAlwaysAuthorization()
     if CLLocationManager.locationServicesEnabled(){     
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
        locationManager.distanceFilter = 500
        locationManager.requestWhenInUseAuthorization()
        locationManager.requestAlwaysAuthorization()
        locationManager.startUpdatingLocation()  
  }   
    mapView.settings.myLocationButton = true
    mapView.settings.zoomGestures = true
    mapView.animate(toViewingAngle: 45)
    mapView.delegate = self  }

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
     let newLocation = locations.last // find your device location
     mapView.camera = GMSCameraPosition.camera(withTarget: newLocation!.coordinate, zoom: 14.0) // show your device location on map
     mapView.settings.myLocationButton = true // show current location button
     var lat = (newLocation?.coordinate.latitude)! // get current location latitude
     var long = (newLocation?.coordinate.longitude)! //get current location longitude

}

回答by Balázs Vincze

The problem is that you are setting the mapView's frame to CGRectZero. This causes the map to have zero height and zero width, no wonder it does not show!

问题是您将 mapView 的框架设置为CGRectZero。这导致地图高度为零，宽度为零，难怪不显示！

Try setting it to CGRectMake(0,0,200,200)for example, this will give you a map at the left top of the screen with a size of 200 x 200.

例如，尝试将其设置为CGRectMake(0,0,200,200)，这将在屏幕左上角显示一个大小为 200 x 200 的地图。

I have never used Swift before, so the syntax might be a little different for CGRectMake()

我以前从未使用过 Swift，所以语法可能有点不同 CGRectMake()

回答by bwcooley

It seems that your creation of the map isn't in your viewDidLoadfunction. You may want to try moving that there and see what happens.

似乎您创建的地图不在您的viewDidLoad功能中。您可能想尝试将其移到那里，看看会发生什么。

回答by Asel Kash

Add the appropriate properties into the info.plist.

将适当的属性添加到info.plist.

You should put make sure you have the NS properties of locationalwaysusagedescriptionand wheninuseusagedescriptionin the information properties list. This allows for the permissions of the current location to be asked.

您应该确保在信息属性列表中具有locationalwaysusagedescription和的 NS 属性wheninuseusagedescription。这允许询问当前位置的权限。