Swift 中的 CLLocation 管理器获取用户的位置

Question

我正在尝试将 ObjC 中的旧应用程序转换为 Swift 作为练习，但遇到了一些问题。我在旧应用程序中使用它的方式是建立 CLLocation 管理器，然后我会使用：

manager = [[CLLocationManager alloc]init];
manager.delegate = self;
manager.desiredAccuracy = kCLLocationAccuracyBest;    
[manager startUpdatingLocation]

自动调用：

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
}

从那里我可以提取我需要的所有信息。但是很快，这种方法没有自动完成功能，我无法弄清楚如何重现它。文档说

startUpdatingLocation()

仍然会被委托调用，但它没有发生。

这是我目前所拥有的：

import UIKit
import corelocation

class ViewController: UIViewController,CLLocationManagerDelegate{

@IBOutlet var gpsResult : UILabel

var manager:CLLocationManager!

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

    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.startUpdatingLocation()
}

func locationManager(manager:CLLocationManager, didUpdateLocations locations:AnyObject[]) {
    println("locations = \(locations)")
    gpsResult.text = "success"
}
}

任何有关查看位置的帮助或指示将不胜感激。谢谢。

编辑：根据建议更新，但仍然无法正常工作

EDIT2：似乎是一些错误不允许该方法在 ViewController 中正常工作

Answer 1

你错过了两件事。首先，您必须使用requestAlwaysAuthorization 或requestWhenInUseAuthorization() 请求许可。所以你的viewDidLoad() 应该是这样的：

var locationManager = CLLocationManager()

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

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

其次，编辑你的Info.plistas indicated here。

Answer 2

首先在plist文件中添加这两行

1. NSLocationWhenInUseUsageDescription

2. NSLocationAlwaysUsageDescription

那么这是类工作完成实现这个

import UIKit

import CoreLocation

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {

var window: UIWindow?
var locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    initLocationManager();
    return true
}

// Location Manager helper stuff
func initLocationManager() {
    seenError = false
    locationFixAchieved = false
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.locationServicesEnabled
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    locationManager.requestAlwaysAuthorization()
}

// Location Manager Delegate stuff
// If failed
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
    locationManager.stopUpdatingLocation()
    if (error) {
        if (seenError == false) {
            seenError = true
           print(error)
        }
    }
}

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: AnyObject[]!) {
    if (locationFixAchieved == false) {
        locationFixAchieved = true
        var locationArray = locations as NSArray
        var locationObj = locationArray.lastObject as CLLocation
        var coord = locationObj.coordinate

        println(coord.latitude)
        println(coord.longitude)
    }
}

// authorization status
func locationManager(manager: CLLocationManager!,
    didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        var shouldIAllow = false

        switch status {
        case CLAuthorizationStatus.Restricted:
            locationStatus = "Restricted Access to location"
        case CLAuthorizationStatus.Denied:
            locationStatus = "User denied access to location"
        case CLAuthorizationStatus.NotDetermined:
            locationStatus = "Status not determined"
        default:
            locationStatus = "Allowed to location Access"
            shouldIAllow = true
        }
        NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
        if (shouldIAllow == true) {
            NSLog("Location to Allowed")
            // Start location services
            locationManager.startUpdatingLocation()
        } else {
            NSLog("Denied access: \(locationStatus)")
        }
}
}

Answer 3

我不知道为什么，但似乎startUpdatingLocation 没有在 iOS 7 模拟器上显示用户提示，但是当我手动启用它时，如果我使用较新形式的委托方法，它会按预期工作：

var manager:CLLocationManager!

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

    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.startUpdatingLocation()
}

func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) { // Updated to current array syntax [AnyObject] rather than AnyObject[]
    println("locations = \(locations)")
}

您使用的格式自 iOS 5 或 6 以来已被弃用，因此显然 swift 桥接层根本不支持它。

Answer 4

有同样的问题。 didUpdateLocations - 没有工作。运行您的应用程序。转到设置页面 -> 隐私 -> 位置并关闭定位服务。 didFailWithError 将捕获有关缺少位置服务的错误。然后打开它。从那一刻起，didUpdateLocations 将捕获位置。

Answer 5

这是我非常简单的代码：

首先在 General/Linked Frameworks and Libraries 中添加 Core Location 框架

然后将以下内容添加到 Info.plist 中：

<key>NSLocationWhenInUseUsageDescription</key>
<string>blablabla</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>blablabla</string>

这是我的 ViewController.swift 文件：

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    var locationManager:CLLocationManager!

    override func viewDidLoad() {
        super.viewDidLoad()

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


    func locationManager(manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        print("locations = \(locations)")
    }

}

Answer 6

对于 Swift 3

import UIKit
import CoreLocation

class ViewController: UIViewController,CLLocationManagerDelegate {


    var locationManager:CLLocationManager!

    override func viewDidLoad() {
        super.viewDidLoad()

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

        // 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 locationManager(_ manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        print("locations = \(locations)")
    }


}

Answer 7

我希望有两种方法。

var locationManager: CLLocationManager = CLLocationManager()
var initialLocation :CLLocation?
var updatedUserLocation :CLLocation?

override func viewDidLoad() {
    super.viewDidLoad() {

    //MapView Location
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
    locationManager.startUpdatingHeading()
}

实现 CLLocationManagerDelegate ：

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

    // This only works when user location is updated.
    gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)

}

func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {

    //Error indicates GPS permission restricted

    gpsProviderStatusLabel.changeStatusToOff(gpsProviderStatusLabel)

    //Initial Location
    initialLocation = locations.first

    //Getting Updated Location
    updatedUserLocation = locations.last
}

检查 CLLocationDelegate 授权：

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {

    //This method does real time status monitoring.

        switch status {
        case .NotDetermined:
          print(".NotDetermined")
          break

        case .AuthorizedAlways:
          print(".AuthorizedAlways")
          gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)
          break


        case .Denied:
          print(".Denied")
          gpsProviderStatusLabel.changeStatusToOff(gpsProviderStatusLabel)
          break

        case .AuthorizedWhenInUse:
          print(".AuthorizedWhenInUse")
          gpsProviderStatusLabel.changeStatusToOn(gpsProviderStatusLabel)
          break

        case .Restricted:
          print(".Restricted")
          break

        default:
          print("Unhandled authorization status")
          break

        }
      }

注意：changeStatusToOn 或 changeStatusToOff 是 UILabel 扩展方法，它使标签文本以绿色/红色颜色打开/关闭。

Answer 8

别忘了添加 NSLocationWhenInUseUsageDescription 或 NSLocationAlwaysUsageDescription 在您的配置文件中（目标/信息/自定义 iOS 目标属性

Answer 9

在 info.plist

中添加 bellow 2 属性

NSLocationWhenInUseUsageDescription : Location information is used for fraud prevention

Privacy - Location Usage Description : Location information is used for fraud prevention

Answer 10

如果您想默认更新用户位置，而不是每次都点击“模拟位置”，请转到

YourProject-->Build Phases-->Link Binary with libraries-->Add corelocation.framework

当您在模拟器中运行应用程序时，位置会自动/默认更新。在 Swift 2 中测试并运行！

Answer 11

这将请求许可并跟踪是否获得许可，否则退出并发出警报。按下后退按钮时停止跟踪。

info.plist

<key>NSLocationAlwaysUsageDescription</key>
<string>Allow tracking while completing a survey</string>

类：

import UIKit
import CoreLocation    

class LocationViewController: BaseViewController, CLLocationManagerDelegate {

        // MARK: Constants

        private static let enableLocationServices = [
            "title" : "Location",
            "message" : "Enable location services",
            "buttonTitle" : "OK"
        ]

        // MARK: Private variables

        private var manager: CLLocationManager?

        // MARK: UIViewCOntroller methods

        @IBAction func backButtonPressed(sender : UIButton) {
            stopTracking()
            detatchLocationManager()
            dismissViewControllerAnimated(true, completion: nil)
        }

        override func viewDidLoad() {
            super.viewDidLoad()

            attachLocationManager()    
        }

        // Mark: Location

        func locationManager(manager: CLLocationManager,
                             didChangeAuthorizationStatus status: CLAuthorizationStatus)
        {
            if status == .AuthorizedAlways {
                manager.startUpdatingLocation()
            } else if status != .NotDetermined {
                showEnableLocationServicesAlert()
            }
        }

        func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
            for location in locations {
                getDependencyService().getProject().appendLocationTrackingFile(location.timestamp, latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
            }
        }

        // MARK: LocationViewController

        private func attachLocationManager() {
            manager = CLLocationManager()
            manager?.delegate = self
            manager?.desiredAccuracy = kCLLocationAccuracyBest

            if CLLocationManager.authorizationStatus() != .AuthorizedAlways {
                manager?.requestAlwaysAuthorization()
            } else if CLLocationManager.locationServicesEnabled() {
                startTracking()
            }
        }

        private func detatchLocationManager() {
            manager?.stopUpdatingLocation()
            manager?.delegate = nil
            manager = nil
        }

        private func startTracking() {
            manager?.startUpdatingLocation()
        }

        private func stopTracking() {
            manager?.stopUpdatingLocation()
        }

        private func showEnableLocationServicesAlert() {
getDependencyService().getUiHelper().showAlert(FrogFirstSurveyViewController.enableLocationServices, completion: {
                self.dismissViewControllerAnimated(true, completion: nil)
            })
        }

    }

Answer 12

斯威夫特：

添加以下内容

import CoreLocation
class YourViewController: UIViewController
{
       var locationManager:CLLocationManager!
}


//MARK:- Location Manager
extension YourViewController: CLLocationManagerDelegate {

    func stratLocationManager()
    {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        self.checkUsersLocationServicesAuthorization()
        locationManager.startUpdatingLocation()

    }

    func checkUsersLocationServicesAuthorization(){
        /// Check if user has authorized Total Plus to use Location Services
        if CLLocationManager.locationServicesEnabled()
        {
            switch CLLocationManager.authorizationStatus()
            {
            case .notDetermined:
                // Request when-in-use authorization initially
                // This is the first and the ONLY time you will be able to ask the user for permission
                self.locationManager.delegate = self
                locationManager.requestWhenInUseAuthorization()
                break

            case .restricted, .denied:
                // Disable location features
                PrintLogs("Location Access Not Available")
                break

            case .authorizedWhenInUse, .authorizedAlways:
                // Enable features that require location services here.
                PrintLogs("Location Access Available")
                break
            }
        }
    }

    func locationManager(_ manager:CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        print("locations = \(locations)")
    }
}

Answer 13

只需调用 init(vc : UIViewController)。

    import Foundation
    import CoreLocation
    import UIKit


    class LocManager : NSObject{


        var permission : ((Bool?)->())?

        private var locationManager : CLLocationManager!

        init(_ vc : UIViewController) {
            super.init()
            self.locationManager = CLLocationManager()
            self.locationManager.delegate = vc as? CLLocationManagerDelegate
            setUpLocationManagerDelegate()
        }


    }

    extension LocManager : CLLocationManagerDelegate {

        fileprivate func setUpLocationManagerDelegate(){
               locationManager = CLLocationManager()
               locationManager.delegate = self
               locationManager.desiredAccuracy = kCLLocationAccuracyBest
               locationManager.requestAlwaysAuthorization()
           }

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

            if let lat  = locations.last?.coordinate.latitude, let long = locations.last?.coordinate.longitude{
                print("\n\nThe current Lat/Long Is Here\n\n")
                let coordinates = CLLocationCoordinate2D(latitude: lat, longitude: long)

            }else{
                print("Unable To Access Locaion")
            }
        }

        func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {

            switch status {
            case .authorizedAlways,.authorizedWhenInUse:
                print("Good to go and use location")
                locationManager.startUpdatingLocation()
                self.callPermisssionCompletion(val: true)

            case .denied:
                print("DENIED to go and use location")
                self.callPermisssionCompletion(val: false)

            case .restricted:
                print("DENIED to go and use location")
                self.callPermisssionCompletion(val: nil)

            case .notDetermined:
                print("DENIED to go and use location")
                self.callPermisssionCompletion(val: nil)

            default:
                print("Unable to read location :\(status)")
            }
        }


        fileprivate func callPermisssionCompletion(val : Bool?){

            guard let comp = self.permission else {
                print("\n\n Unable to  locate completions \n\n")
                return
            }
            if let val =  val{
                comp(val)
            }

        }


    }