未获取 swift 中的用户当前位置 4

Question

位置未打印到控制台。我以前使用过这个确切的代码，但自从更新到 Xcode 10 后，它就不会将用户当前位置打印到控制台中。

var locationManager: CLLocationManager!

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()
    }
}

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)")

}

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

Info.plist:

Answer 1

确认 NSLocationWhenInUseUsageDescription 和 NSLocationAlwaysUseUsageDescription 在您的 plist 文件中。

Answer 2

你导入了吗CoreLocation？

尝试更改您的 locationManager 表格

var locationManager: CLLocationManager!

至

let locationManager = CLLocationManager()

然后在 determineMyCurrentLocation()

中不需要它

我也会 let userLocation = CLLocation() 在您的 class 顶部，然后更新您的位置。

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations:[CLLocation]){
    let newLocation = locations[0]
    let distance = userLocation.distance(from: newLocation)
    // using this to update my location every 100m
    if distance > 100 {
        userLocation = newLocation
    }

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

Answer 3

问题是你的Info.plist。您需要 所有三个键:

修复该问题，应用程序将 spring 恢复正常。我将您的代码粘贴到一个项目中，如图所示设置 Info.plist，它工作正常。

从 iOS 11 开始，您实际上可以省略 "Always"，但您必须同时拥有 "When In Use" 和 "Always and When In Use"，即使您打算只要求 "Always".

运行时实际上一直在 Xcode 控制台中告诉您这一点，但您显然没有在看它。它说：

The app's Info.plist must contain both NSLocationAlwaysAndWhenInUseUsageDescription and NSLocationWhenInUseUsageDescription keys with string values explaining to the user how the app uses this data.

Answer 4

步骤：1 -导入

import MapKit
import CoreLocation

步骤：2 - 使用：MKMapViewDelegate,CLLocationManagerDelegate

步骤：3 -

var locationManager = CLLocationManager()
var latitude: Double = 0.0
var longitude: Double = 0.0

步骤：4 - 在 ViewDidLoad

 self.determineMyCurrentLocation()

步骤：5 - 定义 Func

func determineMyCurrentLocation() {
    if CLLocationManager.locationServicesEnabled()
    {
        self.locationManager = CLLocationManager()
        self.locationManager.delegate = self
        self.locationManager.distanceFilter = kCLDistanceFilterNone
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest

        let authorizationStatus = CLLocationManager.authorizationStatus()
        if (authorizationStatus == .authorizedWhenInUse || authorizationStatus == .authorizedAlways)
        {
            self.locationManager.startUpdatingLocation()
        }
        else if (locationManager.responds(to: #selector(CLLocationManager.requestAlwaysAuthorization)))
        {
             self.locationManager.requestAlwaysAuthorization()
        }
        else
        {
            self.locationManager.startUpdatingLocation()
        }
    }
}

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
    {
        print("Error while requesting new coordinates")
    }

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
    self.latitude = locations[0].coordinate.latitude
    self.longitude = locations[0].coordinate.longitude
}

Insert in info.plist {Privacy - Location Usage Description , Privacy - Location Always and When In Use Usage Description ,Privacy - Location When In Use Usage Description , Privacy - Location Always Usage Description}

未获取 swift 中的用户当前位置 4

Not getting users current location in swift 4

core-location

swift

xcode10