Swift 更新经纬度

Question

我想在每次按下按钮时提取和更新纬度和经度并显示用户在初始位置的位置，更新位置非常重要，因为它是附近的应用程序，这是我的代码：

var locationManager = CLLocationManager()


@IBAction func update(_ sender: Any) {
    locationManager.startUpdatingLocation()


}
override func viewDidAppear(_ animated: Bool) {

    super.viewDidAppear(animated)

    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()



    let url = URL(string: "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=\(latitude),\(longitude)radius=5000&types=gas_station&key=AIzaSyDVyaidSrF37d0M6XrHvosTXK4z-rkoLDg")!

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

    let userLocation: CLLocation = locations[0]

    let latitude = userLocation.coordinate.latitude

    let longitude = userLocation.coordinate.longitude

    let latDelta: CLLocationDegrees = 0.05

    let lonDelta: CLLocationDegrees = 0.05

    let span: MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta)

    let location: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)

    let region: MKCoordinateRegion = MKCoordinateRegion(center: location, span: span)


    map.setRegion(region, animated: true)


    locationManager.stopUpdatingLocation()
}

Answer 1

您有一个 CLLocationManager。您可以随时获取设备的位置

locationManager.location

这是一个CLLocation。我要警告的一件事是 requestAuthorization 等......需要几秒钟，并且该位置将为零，直到它完成并且 CLLocationManager 已开始定位。因此，在解包选项时要小心，并考虑在之前的 VC 中创建您的 locationManager 并请求授权。一个完整的 IBAction，获取用户的位置，并在 URL 中插入 lat 和 long：

@IBAction func pushed(_ sender: Any) {
    if let location = locationManager.location {
          let url = URL(string: "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=\(location.coordinate.latitude),\(location.coordinate.longitude)radius=5000&types=gas_station&key=AIzaSyDVyaidSrF37d0M6XrHvosTXK4z-rkoLDg")!
          // Now do whatever you need to do with the URL, at this point
    }
}