ios: How to reload webview from a Coordinator class SwiftUi - swift

Question

I am making an app that contains multiple web-view's. I am wanting to reload my web-view from the coordinator class after a JS command is sent from the webpage and inside the "func processReturnedJS(body: String)" shown below. I am wondering how I can achieve this in a simple way?
Thanks
SubscriptionViewController:
import SwiftUI
import WebKit
struct SubscriptionViewController: UIViewRepresentable {
#StateObject var storeManager: StoreManager
let frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
let config = WKWebViewConfiguration()
let cookies = HTTPCookieStorage.shared.cookies ?? []
func makeUIView(context: UIViewRepresentableContext<SubscriptionViewController>) -> WKWebView {
for cookie in cookies {
config.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
}
let preferences = WKPreferences()
let configuration = WKWebViewConfiguration()
configuration.preferences = preferences
let userContentController = WKUserContentController()
userContentController.add(context.coordinator, name:"observer")
configuration.userContentController = userContentController
let view = WKWebView(frame: frame, configuration: configuration)
view.navigationDelegate = context.coordinator
DispatchQueue.main.async {
let url = URL(string:"theurl")!
let request = URLRequest(url: url)
for cookie in cookies {
config.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
view.configuration.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
}
view.load(request)
}
return view
}
func updateUIView(_ uiView: WKWebView, context: UIViewRepresentableContext<SubscriptionViewController>) {
}
func makeCoordinator() -> CoordinatorSubscription {
CoordinatorSubscription(self, storeManage: self.storeManager)
}
typealias UIViewType = WKWebView
}
class CoordinatorSubscription: NSObject, WKNavigationDelegate, WKScriptMessageHandler {
var control: SubscriptionViewController
var storeManage: StoreManager
init(_ control: SubscriptionViewController, storeManage: StoreManager) {
self.control = control
self.storeManage = storeManage
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
processReturnedJS(body: message.body as! String)
}
func sendjs(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
}
func processReturnedJS(body: String) {
print("kkkk")
//want to reload webview from here
}
}

Answer 1

You can store a reference to the WKWebView in your coordinator:
class CoordinatorSubscription: NSObject, WKNavigationDelegate, WKScriptMessageHandler {
var control: SubscriptionViewController
var storeManage: StoreManager
var webView : WKWebView? //<-- Here
init(_ control: SubscriptionViewController, storeManage: StoreManager) {
self.control = control
self.storeManage = storeManage
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
processReturnedJS(body: message.body as! String)
}
func sendjs(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
}
func processReturnedJS(body: String) {
self.webView?.reload() //here
}
}
Then, make sure to set that property in makeUIView:
func makeUIView(context: UIViewRepresentableContext<SubscriptionViewController>) -> WKWebView {
for cookie in cookies {
config.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
}
let preferences = WKPreferences()
let configuration = WKWebViewConfiguration()
configuration.preferences = preferences
let userContentController = WKUserContentController()
userContentController.add(context.coordinator, name:"observer")
configuration.userContentController = userContentController
let view = WKWebView(frame: frame, configuration: configuration)
view.navigationDelegate = context.coordinator
DispatchQueue.main.async {
let url = URL(string:"theurl")!
let request = URLRequest(url: url)
for cookie in cookies {
config.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
view.configuration.websiteDataStore.httpCookieStore.setCookie(cookie, completionHandler: nil)
}
view.load(request)
}
context.coordinator.webView = view //<-- Here
return view
}