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ios - 在加载 WKWebView 之前尝试获取 CLLocation 坐标

问题描述

基本上基于坐标，我得到了状态（纽约、加利福尼亚等），并根据状态，我访问了一个特定的 url，我使用 WKWebView() 打开网站。

但是，当 webView 需要加载它时，我的 url 一直为零。如果我注释掉webView.load(URLRequest(url: url!)))，我注意到 url 值不是 nil （通过打印语句）。所以基本上，我需要在 webView 准备好加载 url 之前获取坐标值。我已经玩过订购，但我无法让它工作。

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)
    }

}

我很茫然:(谢谢你的帮助。

标签： iosswiftcllocationmanagerwkwebview

解决方案

与其在请求许可后启动WKWebView权限，不如在您实际拥有位置（即在委托中）后执行此操作

func locationManager(CLLocationManager, didUpdateLocations: [CLLocation])将是一个理想的地方，只需确保只执行一次您的操作，因为此委托方法将被连续调用。或者，您也可以在didChangeAuthorization函数中执行此操作。

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