ios - AppDelegate Extension 未被调用

Question

我试图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，它将在 AppDelegate 的 didFinishLaunchingWithOptions 函数中更新.我已经像这样实现了位置管理器:

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
}

和扩展名:

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

userLocation 永远不会更新，我在 userLocation = locations.last! 行上放置了一个断点，但它永远不会到达那里。

谢谢你的建议

Answer 1

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
}