Question

基本上根据坐标，获得状态（NY，CA等），并根据状态，访问特定的URL，然后使用WKWebView（）打开网站。

但是，在webView需要加载该URL时，我的URL一直为nil。如果我注释掉webView.load(URLRequest(url: url!)))，我会注意到url值不是nil（通过print语句）。因此，基本上，我需要在webView准备加载网址之前获取坐标值。我已经尝试过订购了，但是无法正常工作。

import UIKit
import WebKit
import CoreLocation


class ViewController: UIViewController,  WKNavigationDelegate,CLLocationManagerDelegate {

    var state: String?

    let locationManager = CLLocationManager()
    let translator = CLGeocoder()
    var webView: WKWebView!


    var locationsDict : [String:String] = ["CA" : "https://stackoverflow.com",
                                           "NY": "https://old.reddit.com"]


    override func viewDidLoad() {
        super.viewDidLoad()


        locationManager.requestWhenInUseAuthorization()
        if CLLocationManager.locationServicesEnabled() {
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyKilometer // You can change the locaiton accuary here.
            locationManager.startUpdatingLocation()
        }



            webView = WKWebView()
            webView.navigationDelegate = self
            view = webView



            var url: URL?
            if state != nil{
                    let urlString = locationsDict[state!]
                    print(urlString)
                        if urlString != nil{
                                url = URL(string: urlString!)!

                }
                }
        webView.load(URLRequest(url: url!))
        //webView.allowsBackForwardNavigationGestures = true
            print(state)

        }


func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        if let location = locations.first {

            translator.reverseGeocodeLocation(location){(placemark, error) in
                if error != nil{
                    print("There was an error")
                }
                else{
                    if let place = placemark?[0]
                    {
                        if let temp = place.administrativeArea{
                                self.state = temp
                            print(self.state!)
                    }

                        else {print ("Cant find location")}
                }
            }





        }
    }
    }

    // If we have been deined access give the user the option to change it
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if(status == CLAuthorizationStatus.denied) {
            showLocationDisabledPopUp()
        }
    }




    // Show the popup to the user if we have been deined access
    func showLocationDisabledPopUp() {
        let alertController = UIAlertController(title: "Background Location Access Disabled",
                                                message: "In order to deliver pizza we need your location",
                                                preferredStyle: .alert)

        let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
        alertController.addAction(cancelAction)

        let openAction = UIAlertAction(title: "Open Settings", style: .default) { (action) in
            if let url = URL(string: UIApplicationOpenSettingsURLString) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }
        }
        alertController.addAction(openAction)

        self.present(alertController, animated: true, completion: nil)
    }

}

我不知所措:(谢谢您的帮助。

Answer 1

与其在请求权限后立即启动WKWebView，不如在您实际拥有某个位置（即在委托人中）后执行此操作

func locationManager(CLLocationManager, didUpdateLocations: [CLLocation])是一个理想的选择，只需确保只执行一次操作即可，因为此委托方法将被连续调用。另外，您也可以在didChangeAuthorization函数中做到这一点。

尝试在加载WKWebView之前获取CLLocation坐标

1 个答案: