无法看到位置：[CLLocation]

Question

info.plist 文件:

<key>NSLocationWhenInUseUsageDescription</key>
<string>This project would like to know your location</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>location when app is in background</string>

如上所示，为 info.plist

添加了 key/value 对

我面临的问题是，我第一次运行应用程序提示我授权，但在随后的运行中，弹出窗口没有出现。

其次，我正在尝试打印来自
的位置 func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 使用 print(location) 但未打印任何内容。

在调试选项中我将位置设置为 "city bicycle ride"

我使用的代码如下。

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate , CLLocationManagerDelegate {
@IBOutlet var map: MKMapView!

//use the locManager to get the users location

var locManager = CLLocationManager()

override func viewDidLoad() {
    locManager.delegate = self
    locManager.desiredAccuracy = kCLLocationAccuracyBest
    locManager.requestWhenInUseAuthorization()
    super.viewDidLoad()

}

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

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


}

Answer 1

iOS 只会请求一次位置授权。如果用户拒绝，他将不得不在设备设置中手动更改此设置。如果他同意，您将能够获取该位置，直到他在设备设置中阻止它。

所以这段代码：

locManager.requestWhenInUseAuthorization()

只会弹出 1 次。问题是您可能忘记调用：

locManager.startUpdatingLocation()

每次要开始获取位置都需要调用这个。

Answer 2

使用这个

override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestLocation()
locationManager.requestWhenInUseAuthorization()
locationManager.requestAlwaysAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}

无法看到位置：[CLLocation]

unable to see locations: [CLLocation]

mapkit

ios

swift