ios - 如何在 Swift 中使用 "Show my current location on google maps, when I open the ViewController?"？

Question

我正在使用 iOS(Swift) 的 Google map sdk。

有谁知道如何“在我打开 ViewController 时在谷歌地图上显示我的当前位置”？

实际上它就像谷歌地图应用程序。当您打开 Google map 时，蓝点将显示您当前的位置。您不需要在第一次按“myLocationButton”。

所以这是代码:

import UIKit
import CoreLocation
import GoogleMaps

class GoogleMapsViewer: UIViewController {

    @IBOutlet weak var mapView: GMSMapView!

    let locationManager = CLLocationManager()
    let didFindMyLocation = false

    override func viewDidLoad() {
        super.viewDidLoad()

        let camera = GMSCameraPosition.cameraWithLatitude(23.931735,longitude: 121.082711, zoom: 7)
        let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)

        mapView.myLocationEnabled = true
        self.view = mapView

        // GOOGLE MAPS SDK: BORDER
        let mapInsets = UIEdgeInsets(top: 80.0, left: 0.0, bottom: 45.0, right: 0.0)
        mapView.padding = mapInsets

        locationManager.distanceFilter = 100
        locationManager.delegate = self
        locationManager.requestWhenInUseAuthorization()

        // GOOGLE MAPS SDK: COMPASS
        mapView.settings.compassButton = true

        // GOOGLE MAPS SDK: USER'S LOCATION
        mapView.myLocationEnabled = true
        mapView.settings.myLocationButton = true
    }
}


// MARK: - CLLocationManagerDelegate
extension GoogleMapsViewer: 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: 20, bearing: 0, viewingAngle: 0)
            locationManager.stopUpdatingLocation()
        } 
    }
}

有人帮忙吗？非常感谢!

Answer 1

For Swift 3.x solution, please check this Answer

首先你们必须在Info.plist文件中输入一个 key NSLocationWhenInUseUsageDescription

添加此键后，只需创建一个 CLLocationManager 变量并执行以下操作

@IBOutlet weak var mapView: GMSMapView!
var locationManager = CLLocationManager()

class YourControllerClass: UIViewController,CLLocationManagerDelegate {

    //Your map initiation code 
    let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
    self.view = mapView
    self.mapView?.myLocationEnabled = true

    //Location Manager code to fetch current location
    self.locationManager.delegate = self
    self.locationManager.startUpdatingLocation()
}


//Location Manager delegates
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    let location = locations.last

    let camera = GMSCameraPosition.cameraWithLatitude((location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!, zoom: 17.0)

    self.mapView?.animateToCameraPosition(camera)

    //Finally stop updating location otherwise it will come again and again in this delegate
    self.locationManager.stopUpdatingLocation()

}

当您运行代码时，您会弹出允许和不允许定位的窗口。只需单击“允许”，您就会看到您的当前位置。

确保在设备而不是模拟器上执行此操作。如果您使用的是模拟器，则必须选择一些自定义位置，然后只有您才能看到蓝点。