Question

我正在使用谷歌地图显示一组引脚的应用，我希望地图的相机从用户的位置开始。我尝试编写以下代码（在Swift 2.0中），但它没有把我放在设备的当前位置，而是它向我显示一个空白的蓝色屏幕（我发现它是地图的中间位置）。这是我所拥有的屏幕截图

Here's a screenshot of what I have

我在编写此代码时使用了以下库：

Google Maps SDK

OneShotLocationManager

这是我的代码（在ViewController.swift中）

import UIKit
import GoogleMaps

class ViewController: UIViewController, GMSMapViewDelegate {

    var manager: OneShotLocationManager?

    var userlat: Double = 0.0
    var userlng: Double = 0.0

    override func viewDidLoad() {
        manager = OneShotLocationManager()
        manager!.fetchWithCompletion {location, error in

            // fetch location or an error
            if let loc = location {
                print(loc)
                self.userlat = loc.coordinate.latitude
            } else if let err = error {
                print(err.localizedDescription)
            }
            self.manager = nil
        }


        super.viewDidLoad()

        let camera = GMSCameraPosition.cameraWithLatitude(userlat,
            longitude: userlng, zoom: 6)

        let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
        mapView.myLocationEnabled = true
        mapView.delegate = self
        self.view = mapView

        let marker = GMSMarker()
        marker.position = CLLocationCoordinate2DMake(-33.86, 151.20)
        marker.title = "Sydney"
        marker.snippet = "Australia"
        marker.map = mapView
    }

    func mapView(mapView: GMSMapView!, markerInfoWindow marker: GMSMarker!) -> UIView! {
        let infoWindow = NSBundle.mainBundle().loadNibNamed("CustomInfoWindow", owner: self, options: nil).first! as! CustomInfoWindow
        infoWindow.label.text = "\(marker.position.latitude) \(marker.position.longitude)"
        return infoWindow
    }

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

这是运行应用程序后的控制台输出。请注意，它确实输出用户的当前位置：

1 + 51.50998000，-0.13370000＆GT; +/- 5.00m（速度-1.00 mps /航向-1.00）@ 2/3 / 16,8：47：57太平洋标准时间 2016-02-03 08：47：57.545 Hanky Ranky [3379：260848]适用于iOS版的Google Maps SDK：1.11.21919.0

感谢帮助人员！

Answer 1

也许你在ViewController.swift中缺少两个属性。

var locationManager = CLLocationManager()

var didFindMyLocation = false

locationManager 属性将用于询问用户是否允许跟踪他/她的位置，然后根据授权状态显示他/她的当前位置。将使用 didFindMyLocation 标志，以便我们知道用户的当前位置是否在地图上被发现，并最终避免不必要的位置更新。

此Swift Tutorial for Google Maps可能会有所帮助。

Answer 2

class ViewController: UIViewController, GMSAutocompleteViewControllerDelegate
{


    var placeName: String = "Default"
    var userlat: CLLocationDegrees = 0
    var userlng: CLLocationDegrees = 0

    override func viewDidLoad() {
    super.viewDidLoad()


    let acController = GMSAutocompleteViewController()
    acController.delegate = self
    self.presentViewController(acController, animated: true, completion: nil)




    // Do any additional setup after loading the view.
    }

    override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    let camera = GMSCameraPosition.cameraWithLatitude(userlat,
        longitude: userlng, zoom: 6)

    let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
    mapView.myLocationEnabled = true
    mapView.delegate = self


    let marker = GMSMarker()
    marker.position = CLLocationCoordinate2DMake(-33.86, 151.20)
    marker.title = "Sydney"
    marker.snippet = "Australia"
    marker.map = mapView

    self.view = mapView

   }


  func viewController(viewController: GMSAutocompleteViewController!, didAutocompleteWithPlace place: GMSPlace!) {

    lat = place.coordinate.latitude
    longi = place.coordinate.longitude
    placeName = place.name
   }

}

我希望这会有所帮助......

iOS Google Maps SDK不显示用户位置

2 个答案: