ios - AppDelegate Extension没有被调用

我正在尝试在启动时立即获取用户位置，为此，我实现了一个全局变量userLocation，该变量将在AppDelegate的didFinishLaunchingWithOptions函数中更新。我已经实现了这样的位置管理器：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    var locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    if CLLocationManager.locationServicesEnabled(){
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestLocation()
    }
    return true
}

以及分机：

extension AppDelegate: CLLocationManagerDelegate {
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        usersLocation = locations.last!
    }
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error)
    }
}

用户位置永远不会更新，我在userLocation = locations.last!行上放置了一个断点，它永远不会到达该值。
谢谢你的建议

最佳答案

我认为您也应该保留locationManager变量。

var locationManager: CLLocationManager!

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    if CLLocationManager.locationServicesEnabled(){
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestLocation()
    }
    return true
}