swift - CoreLocation 的问题

Question

出于某种原因，我似乎无法获取用户的位置。我买了 iOS 9 CookBook 并完全复制了他们的代码

这是 View Controller :

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

lazy var locationManager: CLLocationManager = {
  let m = CLLocationManager()
  m.delegate = self
  m.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
  return m
}()

func locationManager(manager: CLLocationManager,
  didUpdateLocations locations: [CLLocation]) {
    //TODO: now you have access to the location. do your work
}

func locationManager(manager: CLLocationManager,
  didFailWithError error: NSError) {
  //TODO: handle the error
}

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

  if case .AuthorizedWhenInUse = status{
    manager.requestLocation()
  } else {
    //TODO: we didn't get access, handle this
    print("No Access Granted")
  }

}

@IBAction func requestLocation() {

  locationManager.requestWhenInUseAuthorization()

}

}

控制台的输出是:

No Access Granted

有什么想法吗？我已经在模拟器和设备上对此进行了测试

编辑:我已在 Storyboard中添加了一个按钮，并相应地将其添加到 IBAction 中。

Answer 1

您是否已将 NSLocationWhenInUseUsageDescription 键添加到您的 plist 中？ - 该值应该是一个字符串，描述您想要使用用户位置的原因。

<key>NSLocationWhenInUseUsageDescription</key>
<string>Required to provide information about your location.</string>

如果一切正常，didUpdateLocations 委托(delegate)方法应该返回一个位置数组，您可以像这样打印出来......

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    for loc in locations {
        print(loc)
    }
}

如果您想持续监控位置，可以调用 manager.startUpdatingLocation() 而不是 manager.requestLocation()