如何在 swift 中使用 CLLocationManager 获取位置用户？答案

【问题标题】：How to get Location user with CLLocationManager in swift?如何在 swift 中使用 CLLocationManager 获取位置用户？
【发布时间】：2014-08-06 19:21:37
【问题描述】：

我的视图控制器上有这段代码，但这不起作用：

  import UIKit
  import CoreLocation

  class ViewController: UIViewController, CLLocationManagerDelegate {

   var location: CLLocationManager!

  override func viewDidLoad() {
     super.viewDidLoad()

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

  func locationManager(location:CLLocationManager, didUpdateLocations locations:AnyObject[]) {
     println("locations = \(locations)")
     label1.text = "success"
 }

我拥有在其他帖子中阅读的权限。但我没有得到 never，没有 println..

谢谢！！

【问题讨论】：

这对我有用它是一个简单的例子见：stackoverflow.com/a/35973586/3410437

标签： ios swift core-location cllocationmanager

【解决方案1】：

以下是在 Swift 3 中获取用户位置的简单步骤

1) 首先在 plist 文件中添加这一行的描述

 NSLocationWhenInUseUsageDescription

2) 在您的项目中添加 CoreLocation.framework（在 Build Phases-> Link Binary With Library 部分下）

3) 在 AppDelegate 类中

   import CoreLocation

4) 创建locationManager对象如下

    var locationManager:CLLocationManager!

5) 在 didFinishLaunchingWithOptions 中编写如下代码

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = 200
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()

6) 如下所示确认 CLLocationManagerDelegate 委托

   class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate

7) 编写获取用户位置的 CLLocationManagerDelegate 委托方法

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {

    print("location error is = \(error.localizedDescription)")

}


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

    let locValue:CLLocationCoordinate2D = (manager.location?.coordinate)!


    print("Current Locations = \(locValue.latitude) \(locValue.longitude)")
}

【讨论】：

【解决方案2】：

在视图控制器中执行以下操作 [使用 swift] -

  class ViewController:     
  UIViewController,MKMapViewDelegate,CLLocationManagerDelegate {


  var locationManager: CLLocationManager?
  var usersCurrentLocation:CLLocationCoordinate2D?

  override func viewDidLoad() {
    super.viewDidLoad()

    self.locationManager = CLLocationManager()

    if CLLocationManager.authorizationStatus() == .NotDetermined{
        locationManager?.requestAlwaysAuthorization()
    }

    locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    locationManager?.distanceFilter = 200
    locationManager?.delegate = self
    startUpdatingLocation()

    usersCurrentLocation = CLLocationCoordinate2DMake(LATTITUDE, LONGITUDE)
    let span = MKCoordinateSpanMake(0.005, 0.005)
    let region = MKCoordinateRegionMake(usersCurrentLocation!, span)
    mapview.setRegion(region, animated: true)
    mapview.delegate = self
    mapview.showsUserLocation = true

}

//MARK: CLLocationManagerDelegate 方法

func startUpdatingLocation() {
    self.locationManager?.startUpdatingLocation()
}

func stopUpdatingLocation() {
    self.locationManager?.stopUpdatingLocation()
}

// 标记：MKMapViewDelegate

func mapView(mapView: MKMapView, didUpdateUserLocation userLocation: MKUserLocation){
    mapview.centerCoordinate = userLocation.location!.coordinate
    mapview.showsUserLocation = true
    regionWithGeofencing()

}

【讨论】：

【解决方案3】：

应该写成 func locationManager(manager: CLLocationManager, didUpdateLocations 位置: [CLLocation]) {

【讨论】：

【解决方案4】：

这与上面的代码相同，但在发布之日已清理以与 Swift 一起使用。这对我有用。

向原海报致敬。

（请注意，将其粘贴到您将用于处理位置信息的任何类中。）

var lastLocation = CLLocation()
var locationAuthorizationStatus:CLAuthorizationStatus!
var window: UIWindow?
var locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    
    
    self.initLocationManager()
    
}
    // Location Manager helper stuff
    func initLocationManager() {
        seenError = false
        locationFixAchieved = false
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        
        locationManager.requestAlwaysAuthorization()
    }
    
    // Location Manager Delegate stuff
    
    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
        locationManager.stopUpdatingLocation()
        if ((error) != nil) {
            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)
        }
    }
    
    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)")
            }
    }

【讨论】：

如何获取用户旧位置@Wade？span>
我不确定您所说的旧位置是什么意思。你是说你上一次去过的地方吗？
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation 以上方法在Objective c中。我需要用相同的参数精确替换上述方法。

【解决方案5】：

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

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)
    }
}

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)")
        }
}
}

【讨论】：

你好。我做了你写的一切，但 CLAuthorizationStatus.status 始终未确定。为什么？
请检查您的设置 > yourapp > 位置权限
'locationServicesEnabled' 不可用：从 iOS 7 及更早版本开始弃用的 API 在 Swift 中不可用
+ 以 NSException 类型的未捕获异常终止。如何解决这个问题？
@jayeshkavathiya 为什么需要将代码放在 AppDelegate 类中？

【解决方案6】：

由于您将 location 声明为显式解包的可选项（CLLocationManager！），因此它需要一个初始化程序，或者在 jhurray 建议的 init 方法中，或者只是内联，如下所示：

var location: CLLocationManager! = nil

请注意，您还可能遇到其他问题，包括 iOS 8 对查询用户以获得使用 CoreLocation 的权限的新要求。请参阅此question 了解更多信息。

【讨论】：

我有权限，但我不知道我是否拥有所有权限。但我可以看到一个断点，它没有进入函数 func locationManager(location:CLLocationManager, didUpdateLocations locations:AnyObject []) { println("locations = (locations)") label1.text = "success" } 为什么我的应用不用这个功能？？
检查其他链接并确保您同时拨打requestWhenInUseAuthorization/requestAlwaysAuthorization 并在Info.plist 中设置正确的键。此外，请检查您是否拨打了正确的电话以启动经理。

【解决方案7】：

你需要有初始化函数。

覆盖 init(coder:) 和 init(nibName: bundle:) 并添加您想要的任何自定义 init。

因为您已经说过 location 不是可选的，所以您必须在您的 super init 调用所有 init 函数之前对其进行初始化。

func init() {
...
location = CLLocationManager()
// either set delegate and other stuff here or in viewDidLoad
super.init(nibName:nil, bundle:nil)
// other initialization below

}

【讨论】：