获取用户的当前位置/坐标

如何存储用户的当前位置并在地图上显示该位置？

我能够在地图上显示预定义的坐标，只是我不知道如何从设备接收信息。

我也知道我必须将一些项目添加到Plist中。我怎样才能做到这一点？

要获取用户的当前位置，您需要声明：

let locationManager = CLLocationManager()

在其中，viewDidLoad()您必须实例化CLLocationManager该类，如下所示：

// Ask for Authorisation from the User.
self.locationManager.requestAlwaysAuthorization() 

// For use in foreground
self.locationManager.requestWhenInUseAuthorization()

if CLLocationManager.locationServicesEnabled() {
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    locationManager.startUpdatingLocation()
}

然后在CLLocationManagerDelegate方法中，您可以获取用户的当前位置坐标：

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }
    print("locations = \(locValue.latitude) \(locValue.longitude)")
}

在info.plist中，您将必须添加NSLocationAlwaysUsageDescription 和自定义警报消息，例如；AppName（Demo App）要使用您的当前位置。

您应该执行以下步骤：

1. 添加CoreLocation.framework到BuildPhases->使用库链接二进制文件（从XCode 7.2.1开始不再需要）
2. 导入CoreLocation到您的类中-最有可能是ViewController.swift
3. 添加CLLocationManagerDelegate到您的班级声明中
4. 添加NSLocationWhenInUseUsageDescription并添加NSLocationAlwaysUsageDescription到plist

5. 初始化位置管理器：

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

6. 获取用户位置：

   func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
       let locValue:CLLocationCoordinate2D = manager.location!.coordinate
       print("locations = \(locValue.latitude) \(locValue.longitude)")
   }

使用Swift 5更新iOS 12.2

您必须在plist文件中添加以下隐私权限

<key>NSLocationWhenInUseUsageDescription</key>
<string>Description</string>

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Description</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>Description</string>

这就是我

获取当前位置并在Swift 2.0中显示在地图上

确保已将CoreLocation和MapKit框架添加到项目中（XCode 7.2.1 不需要这样做）

import Foundation
import CoreLocation
import MapKit

class DiscoverViewController : UIViewController, CLLocationManagerDelegate {

    @IBOutlet weak var map: MKMapView!
    var locationManager: CLLocationManager!

    override func viewDidLoad()
    {
        super.viewDidLoad()

        if (CLLocationManager.locationServicesEnabled())
        {
            locationManager = CLLocationManager()
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyBest
            locationManager.requestAlwaysAuthorization()
            locationManager.startUpdatingLocation()
        }
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
    {

        let location = locations.last! as CLLocation

        let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

        self.map.setRegion(region, animated: true)
    }
}

这是结果屏幕

导入库，例如：

import CoreLocation

设置代表：

CLLocationManagerDelegate

像这样取变量：

var locationManager:CLLocationManager!

在viewDidLoad（）上编写以下代码：

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

    if CLLocationManager.locationServicesEnabled(){
        locationManager.startUpdatingLocation()
    }

编写CLLocation委托方法：

    //MARK: - location delegate methods
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let userLocation :CLLocation = locations[0] as CLLocation

    print("user latitude = \(userLocation.coordinate.latitude)")
    print("user longitude = \(userLocation.coordinate.longitude)")

    self.labelLat.text = "\(userLocation.coordinate.latitude)"
    self.labelLongi.text = "\(userLocation.coordinate.longitude)"

    let geocoder = CLGeocoder()
    geocoder.reverseGeocodeLocation(userLocation) { (placemarks, error) in
        if (error != nil){
            print("error in reverseGeocode")
        }
        let placemark = placemarks! as [CLPlacemark]
        if placemark.count>0{
            let placemark = placemarks![0]
            print(placemark.locality!)
            print(placemark.administrativeArea!)
            print(placemark.country!)

            self.labelAdd.text = "\(placemark.locality!), \(placemark.administrativeArea!), \(placemark.country!)"
        }
    }

}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    print("Error \(error)")
}

现在设置访问该位置的权限，因此将这些键值添加到您的info.plist文件中

 <key>NSLocationAlwaysUsageDescription</key>
<string>Will you allow this app to always know your location?</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Do you allow this app to know your current location?</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Do you allow this app to know your current location?</string>

100％正常工作。已测试

NSLocationWhenInUseUsageDescription =当应用程序在后台时，请求使用位置服务的权限。在您的plist文件中。

如果这可行，请对答案进行投票。

首先导入Corelocation和MapKit库：

import MapKit
import CoreLocation

从CLLocationManagerDelegate继承到我们的类

class ViewController: UIViewController, CLLocationManagerDelegate

创建一个locationManager变量，这将是您的位置数据

var locationManager = CLLocationManager()

创建一个函数来获取位置信息，具体来说，这个确切的语法可以工作：

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

在您的函数中为用户当前位置创建一个常量

let userLocation:CLLocation = locations[0] as CLLocation // note that locations is same as the one in the function declaration  

停止更新位置，这可防止您的设备在移动时不断更改窗口以使位置居中（如果您希望其他功能不起作用，则可以忽略此位置）

manager.stopUpdatingLocation()

从刚刚定义的userLocatin获取用户协调：

let coordinations = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude,longitude: userLocation.coordinate.longitude)

定义地图的缩放比例：

let span = MKCoordinateSpanMake(0.2,0.2) 结合这两个以获得区域：

let region = MKCoordinateRegion(center: coordinations, span: span)//this basically tells your map where to look and where from what distance

现在设置区域并选择是否要带动画去

mapView.setRegion(region, animated: true)

关闭你的功能 }

从您的按钮或您想将locationManagerDeleget设置为self的另一种方式

现在允许显示位置

指定精度

locationManager.desiredAccuracy = kCLLocationAccuracyBest

授权：

 locationManager.requestWhenInUseAuthorization()

为了能够授权位置服务，您需要将这两行添加到您的plist中

获取位置：

locationManager.startUpdatingLocation()

向用户显示：

mapView.showsUserLocation = true

这是我完整的代码：

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!

    var locationManager = CLLocationManager()


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

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


    @IBAction func locateMe(sender: UIBarButtonItem) {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()

        mapView.showsUserLocation = true

    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let userLocation:CLLocation = locations[0] as CLLocation

        manager.stopUpdatingLocation()

        let coordinations = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude,longitude: userLocation.coordinate.longitude)
        let span = MKCoordinateSpanMake(0.2,0.2)
        let region = MKCoordinateRegion(center: coordinations, span: span)

        mapView.setRegion(region, animated: true)

    }
}

斯威夫特3.0

如果您不想在地图上显示用户位置，而只想将其存储在Firebase或其他地方，请按照以下步骤操作，

import MapKit
import CoreLocation

现在，在VC上使用CLLocationManagerDelegate，并且您必须覆盖下面显示的最后三种方法。您可以使用这些方法查看requestLocation（）方法如何为您提供当前用户位置。

class MyVc: UIViewController, CLLocationManagerDelegate {

  let locationManager = CLLocationManager()

 override func viewDidLoad() {
    super.viewDidLoad()

    isAuthorizedtoGetUserLocation()

    if CLLocationManager.locationServicesEnabled() {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    }
}

 //if we have no permission to access user location, then ask user for permission.
func isAuthorizedtoGetUserLocation() {

    if CLLocationManager.authorizationStatus() != .authorizedWhenInUse     {
        locationManager.requestWhenInUseAuthorization()
    }
}


//this method will be called each time when a user change his location access preference.
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    if status == .authorizedWhenInUse {
        print("User allowed us to access location")
        //do whatever init activities here.
    }
}


 //this method is called by the framework on         locationManager.requestLocation();
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    print("Did location updates is called")
    //store the user location here to firebase or somewhere 
}

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    print("Did location updates is called but failed getting location \(error)")
}

}

现在，您可以在用户登录您的应用后对以下调用进行编码。调用requestLocation（）时，它将进一步调用上述的didUpdateLocations，您可以将位置存储到Firebase或其他任何位置。

if CLLocationManager.locationServicesEnabled() {
            locationManager.requestLocation();
 }

如果您使用的是GeoFire，则可以在上面的didUpdateLocations方法中存储以下位置

geoFire?.setLocation(locations.first, forKey: uid) where uid is the user id who logged in to the app. I think you will know how to get UID based on your app sign in implementation. 

最后但并非最不重要的一点是，转到您的Info.plist并启用“隐私-使用中的使用情况说明时的位置”。

当您使用模拟器进行测试时，始终为您提供一个在Simulator-> Debug-> Location中配置的自定义位置。

首先在您的项目中添加两个框架

1：MapKit

2：Corelocation（从XCode 7.2.1开始不再需要）

在课堂上定义

var manager:CLLocationManager!
var myLocations: [CLLocation] = []

然后在viewDidLoad方法代码中

manager = CLLocationManager()
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestAlwaysAuthorization()
manager.startUpdatingLocation()

//Setup our Map View
mapobj.showsUserLocation = true

不要忘记在plist文件中添加这两个值

1: NSLocationWhenInUseUsageDescription

2: NSLocationAlwaysUsageDescription

import CoreLocation
import UIKit

class ViewController: UIViewController, CLLocationManagerDelegate {

    var locationManager: CLLocationManager!

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

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if status != .authorizedWhenInUse {return}
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.startUpdatingLocation()
        let locValue: CLLocationCoordinate2D = manager.location!.coordinate
        print("locations = \(locValue.latitude) \(locValue.longitude)")
    }
}

由于对的调用requestWhenInUseAuthorization是异步的，因此应用程序会locationManager在用户授予许可或拒绝许可后调用该函数。因此，在授予用户权限的情况下，将获取位置的代码放置在该函数中是适当的。 这是我在上面找到的最好的教程。

 override func viewDidLoad() {

    super.viewDidLoad()       
    locationManager.requestWhenInUseAuthorization();     
    if CLLocationManager.locationServicesEnabled() {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        locationManager.startUpdatingLocation()
    }
    else{
        print("Location service disabled");
    }
  }

这是您的视图加载方法，并且在ViewController类中还包括mapStart更新方法，如下所示

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    var locValue : CLLocationCoordinate2D = manager.location.coordinate;
    let span2 = MKCoordinateSpanMake(1, 1)    
    let long = locValue.longitude;
    let lat = locValue.latitude;
    print(long);
    print(lat);        
    let loadlocation = CLLocationCoordinate2D(
                    latitude: lat, longitude: long            

   )     

    mapView.centerCoordinate = loadlocation;
    locationManager.stopUpdatingLocation();
}

同样不要忘记在项目中添加CoreLocation.FrameWork和MapKit.Framework（从XCode 7.2.1开始不再需要）

用法：

在课程中定义字段

let getLocation = GetLocation()

通过简单的代码在类的函数中使用：

getLocation.run {
    if let location = $0 {
        print("location = \(location.coordinate.latitude) \(location.coordinate.longitude)")
    } else {
        print("Get Location failed \(getLocation.didFailWithError)")
    }
}

类：

import CoreLocation

public class GetLocation: NSObject, CLLocationManagerDelegate {
    let manager = CLLocationManager()
    var locationCallback: ((CLLocation?) -> Void)!
    var locationServicesEnabled = false
    var didFailWithError: Error?

    public func run(callback: @escaping (CLLocation?) -> Void) {
        locationCallback = callback
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
        manager.requestWhenInUseAuthorization()
        locationServicesEnabled = CLLocationManager.locationServicesEnabled()
        if locationServicesEnabled { manager.startUpdatingLocation() }
        else { locationCallback(nil) }
    }

   public func locationManager(_ manager: CLLocationManager,
                         didUpdateLocations locations: [CLLocation]) {
        locationCallback(locations.last!)
        manager.stopUpdatingLocation()
    }

    public func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        didFailWithError = error
        locationCallback(nil)
        manager.stopUpdatingLocation()
    }

    deinit {
        manager.stopUpdatingLocation()
    }
}

不要忘记在info.plist中添加“ NSLocationWhenInUseUsageDescription”。

import Foundation
import CoreLocation

enum Result<T> {
  case success(T)
  case failure(Error)
}

final class LocationService: NSObject {
private let manager: CLLocationManager

init(manager: CLLocationManager = .init()) {
    self.manager = manager
    super.init()
    manager.delegate = self
}

var newLocation: ((Result<CLLocation>) -> Void)?
var didChangeStatus: ((Bool) -> Void)?

var status: CLAuthorizationStatus {
    return CLLocationManager.authorizationStatus()
}

func requestLocationAuthorization() {
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.requestWhenInUseAuthorization()
    if CLLocationManager.locationServicesEnabled() {
        manager.startUpdatingLocation()
        //locationManager.startUpdatingHeading()
    }
}

func getLocation() {
    manager.requestLocation()
}

deinit {
    manager.stopUpdatingLocation()
}

}

 extension LocationService: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    newLocation?(.failure(error))
    manager.stopUpdatingLocation()
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if let location = locations.sorted(by: {$0.timestamp > $1.timestamp}).first {
        newLocation?(.success(location))
    }
      manager.stopUpdatingLocation()
}

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    switch status {
    case .notDetermined, .restricted, .denied:
        didChangeStatus?(false)
    default:
        didChangeStatus?(true)
    }
}
}

需要在必需的ViewController中编写此代码。

 //NOTE:: Add permission in info.plist::: NSLocationWhenInUseUsageDescription


let locationService = LocationService()

 @IBAction func action_AllowButtonTapped(_ sender: Any) {
  didTapAllow()
 }

 func didTapAllow() {
   locationService.requestLocationAuthorization()
 }

 func getCurrentLocationCoordinates(){
   locationService.newLocation = {result in
     switch result {
      case .success(let location):
      print(location.coordinate.latitude, location.coordinate.longitude)
      case .failure(let error):
      assertionFailure("Error getting the users location \(error)")
   }
  }
}

    func getCurrentLocationCoordinates(){
    locationService.newLocation = {result in
        switch result {
        case .success(let location):
            print(location.coordinate.latitude, location.coordinate.longitude)
            CLGeocoder().reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in
                if error != nil {
                    print("Reverse geocoder failed with error" + (error?.localizedDescription)!)
                    return
                }
                if (placemarks?.count)! > 0 {
                    print("placemarks", placemarks!)
                    let pmark = placemarks?[0]
                    self.displayLocationInfo(pmark)
                } else {
                    print("Problem with the data received from geocoder")
                }
            })
        case .failure(let error):
            assertionFailure("Error getting the users location \(error)")
        }
    }
}

这是一个对我有用的复制粘贴示例。

http://swiftdeveloperblog.com/code-examples/determine-users-current-location-example-in-swift/

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    var locationManager:CLLocationManager!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

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

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        determineMyCurrentLocation()
    }


    func determineMyCurrentLocation() {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()

        if CLLocationManager.locationServicesEnabled() {
            locationManager.startUpdatingLocation()
            //locationManager.startUpdatingHeading()
        }
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let userLocation:CLLocation = locations[0] as CLLocation

        // Call stopUpdatingLocation() to stop listening for location updates,
        // other wise this function will be called every time when user location changes.

       // manager.stopUpdatingLocation()

        print("user latitude = \(userLocation.coordinate.latitude)")
        print("user longitude = \(userLocation.coordinate.longitude)")
    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
    {
        print("Error \(error)")
    }
}

// its with strongboard 
@IBOutlet weak var mapView: MKMapView!

//12.9767415,77.6903967 - exact location latitude n longitude location 
let cooridinate = CLLocationCoordinate2D(latitude: 12.9767415 , longitude: 77.6903967)
let  spanDegree = MKCoordinateSpan(latitudeDelta: 0.2,longitudeDelta: 0.2)
let region = MKCoordinateRegion(center: cooridinate , span: spanDegree)
mapView.setRegion(region, animated: true)

100％在iOS Swift 4中工作：Parmar Sajjad

第1步：转到GoogleDeveloper Api控制台并创建ApiKey

第2步：转到项目，安装Cocoapods GoogleMaps吊舱

第3步：转到AppDelegate.swift导入GoogleMaps，然后

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    GMSServices.provideAPIKey("ApiKey")
    return true
}

第4步：导入UIKit导入GoogleMaps类ViewController：UIViewController，CLLocationManagerDelegate {

@IBOutlet weak var mapview: UIView!
let locationManager  = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()
    locationManagerSetting()
    // Do any additional setup after loading the view, typically from a nib.
}

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


func locationManagerSetting() {

    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    self.locationManager.requestWhenInUseAuthorization()
    self.locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    self.showCurrentLocationonMap()
    self.locationManager.stopUpdatingLocation()
}
func showCurrentLocationonMap() {
    let
    cameraposition  = GMSCameraPosition.camera(withLatitude: (self.locationManager.location?.coordinate.latitude)!  , longitude: (self.locationManager.location?.coordinate.longitude)!, zoom: 18)
    let  mapviewposition = GMSMapView.map(withFrame: CGRect(x: 0, y: 0, width: self.mapview.frame.size.width, height: self.mapview.frame.size.height), camera: cameraposition)
    mapviewposition.settings.myLocationButton = true
    mapviewposition.isMyLocationEnabled = true

    let marker = GMSMarker()
    marker.position = cameraposition.target
    marker.snippet = "Macczeb Technologies"
    marker.appearAnimation = GMSMarkerAnimation.pop
    marker.map = mapviewposition
    self.mapview.addSubview(mapviewposition)

}

}

第5步：打开info.plist文件，然后在“隐私-使用中的位置”下方添加“使用情况说明...”，然后在“主情节提要”文件基本名称下方

步骤6：执行