Question

我正在开发一款需要获取用户当前坐标的应用。我计划通过CLLocationManager's didUpdateLocations方法执行此操作。出于某种原因，didUpdateLocations未被执行。但是，似乎locationManager.startUpdatingLocation()被成功调用。我在本网站上看到的其他可能的解决方案都没有为我工作。我已将NSLocationAlwaysUsage添加到info.plist。以下是我的全部代码：

import UIKit
import MapKit
import CoreLocation

var region: MKCoordinateRegion!

class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {


@IBOutlet weak var map: MKMapView!


var locationManager = CLLocationManager()


override func viewDidLoad() {
    super.viewDidLoad()


    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters



self.locationManager.requestAlwaysAuthorization()
self.locationManager.requestWhenInUseAuthorization()

    switch CLLocationManager.authorizationStatus() {
    case .authorizedWhenInUse, .authorizedAlways:
        if CLLocationManager.locationServicesEnabled() {
        locationManager.startUpdatingLocation()
        print("Updating location now")
        }
    case .notDetermined:
        locationManager.requestAlwaysAuthorization()
    case .restricted, .denied:
        print("User must enable access in settings")
        break
    }



    if (region == nil){

    }

    else {
    map.setRegion(region!, animated: true)
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}
}




func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
  print("Got location")

  let userLocation:CLLocation = locations[0]
  let lat:CLLocationDegrees = userLocation.coordinate.latitude
  let long:CLLocationDegrees = userLocation.coordinate.longitude
  let currentPos:CLLocationCoordinate2D = CLLocationCoordinate2DMake(lat, long)

  didUpdateRegion(position: currentPos)

  print(lat)
  print(long)

}


func didUpdateRegion(position: CLLocationCoordinate2D) {

  let span = MKCoordinateSpanMake(0.075, 0.075)
  region = MKCoordinateRegion(center: position, span: span)

}

func locationManager(_manager: CLLocationManager, didFailWithError error: Error) {
  print(error.localizedDescription)
}

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
  switch status {
  case .notDetermined:
      // If status has not yet been determied, ask for authorization
      manager.requestWhenInUseAuthorization()
      break
  case .authorizedWhenInUse:
      // If authorized when in use
      manager.startUpdatingLocation()
      break
  case .authorizedAlways:
      // If always authorized
      manager.startUpdatingLocation()
      break
  case .restricted:
      print("User must activate location services in settings")
      break
  case .denied:
      print("User must activate location services in settings")
      break
  default:
      break
  }
}

当我在模拟器和实际设备上运行此代码时，我会收到允许位置跟踪的通知。接受后，控制台显示＆＃34;立即更新位置，＆＃34;但从来没有打印过＃34;有位置。＆＃34;感谢您对此问题的任何启发，我对应用程序开发一般都是新手。

编辑：我在整个代码中添加了代码，而不仅仅是我认为相关的部分。基本上，我试图让地图上显示的区域跟随用户。我尝试通过更新变量＆＃34; region＆＃34;每当didUpdateLocations函数触发时。

Answer 1

我是否正确并且您只添加了一个密钥 - NSLocationAlwaysUsage？尝试将两个密钥添加到Info.plist：

隐私 - 使用时的位置使用说明
隐私 - 位置始终使用说明

此外，如果您实施此协议方法会发生什么？

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

是否可以打印任何内容？对不起，我打算发表评论，但我没有足够的声誉。

swift - didUpdateLocations没有被调用

1 个答案: