启动应用后,我正在尝试让该应用找到用户的位置。但是,当我尝试requestWhenInUseAuthorization时,我在viewDidLoad方法中不断发现错误,并且收到以下错误:
fatal error: unexpectedly found nil while unwrapping an Optional value (lldb)
如果有人可以帮助我找到解决该问题的方法,我将非常感谢。谢谢!
class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
@IBOutlet weak var mapView: MKMapView!
var lastLocation = CLLocation()
var locationAuthorizationStatus:CLAuthorizationStatus!
var window: UIWindow?
let locationManager: CLLocationManager!
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
self.initLocationManager()
}
override func viewDidLoad() {
super.viewDidLoad()
if (CLLocationManager.locationServicesEnabled()) {
seenError = false
locationFixAchieved = false
locationManager = CLLocationManager()
self.initLocationManager()
locationManager.requestWhenInUseAuthorization()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
mapView.showsUserLocation = true
mapView.delegate = self
self.mapView.setUserTrackingMode(MKUserTrackingMode.Follow, animated: true);
}
// Location Manager helper stuff
func initLocationManager() {
locationManager.requestWhenInUseAuthorization()
}
// Location Manager Delegate stuff
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
locationManager.stopUpdatingLocation()
if ((error) != nil) {
if (seenError == false) {
seenError = true
print(error)
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
最佳答案
您的didload方法在didAppear方法之前被调用。因此,您的位置管理器尚未初始化。因此,您需要在使用它之前对其进行初始化。
关于ios - 尝试在启动应用时使用Swift在Xcode中找到用户位置,但出现可选错误?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28769848/