如何在swift中获取CLLocationManager的位置用户？

Question

我在我的视图控制器上有这个代码,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"
 }

我对其他帖子中的阅读方式有所了解.但我没有得到永远,没有印刷品..

谢谢!!

Answer 1

首先在plist文件中添加这两行

1) NSLocationWhenInUseUsageDescription

2) NSLocationAlwaysUsageDescription

然后这是班级工作完成这个

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)")
        }
}
}

Answer 2

以下是在Swift 3中获取用户位置的简单步骤

1)首先在带有描述的plist文件中添加此行

 NSLocationWhenInUseUsageDescription

2)在项目中添加CoreLocation.framework(在Build Phases-> Link Binary with Library部分下)

3)在AppDelegate类中

   import CoreLocation

4)按如下方式创建locationManager对象

    var locationManager:CLLocationManager!

5)在didFinishLaunchingWithOptions中写下面的代码

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

6)确认CLLocationManagerDelegate委托如下

   class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate

7)编写CLLocationManagerDelegate委托方法以获取用户位置

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)")
}

Answer 3

您需要具有初始化函数。

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

因为您已经说过位置不是可选的，所以您必须在超级 init 调用所有 init 函数之前初始化它。

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

}