Swiftui 如何显示WKWebView url?
我想知道如何在Swiftui 如何显示WKWebView url?,swiftui,wkwebview,uiviewrepresentable,Swiftui,Wkwebview,Uiviewrepresentable,我想知道如何在WKWebView上显示我当前的URL,以及如何在更改时显示URL。目前我添加了一个Text(),但它根本不显示URL。有什么办法可以解决吗 WebView import SwiftUI import WebKit struct WebView : UIViewRepresentable { let request: URLRequest private var webView: WKWebView? init (request: URLReq
WKWebView
上显示我当前的URL,以及如何在更改时显示URL。目前我添加了一个Text()
,但它根本不显示URL。有什么办法可以解决吗
WebView
import SwiftUI
import WebKit
struct WebView : UIViewRepresentable {
let request: URLRequest
private var webView: WKWebView?
init (request: URLRequest) {
self.webView = WKWebView()
self.request = request
}
func makeUIView(context: Context) -> WKWebView {
webView?.load(request)
return webView!
}
func updateUIView(_ uiView: WKWebView, context: Context) {
}
func URL() -> String {
return (webView?.url)?.absoluteString ?? ""
}
func goBack() {
webView?.goBack()
}
func goForward() {
webView?.goForward()
}
}
主视图
struct MainView: View {
var webView: WebView = WebView(request: URLRequest(url: URL(string: "https://www.google.com")!))
var body: some View {
VStack {
//...
Text(webView.URL())
webView
Button(action: { webView.goBack() }, label: { Text("Test") })
//...
}
}
要跟踪
WKWebView
的URL,您需要使用WKNavigationDelegate
您可以在您的UIViewRepresentable
中为WKNavigationDelegate
使用协调器
,并使用@Published
值的观察对象
在WebView
和父视图之间进行通信:
class NavigationState : ObservableObject {
@Published var url : URL?
}
struct WebView : UIViewRepresentable {
let request: URLRequest
var navigationState : NavigationState
func makeCoordinator() -> Coordinator {
return Coordinator()
}
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
context.coordinator.navigationState = navigationState
webView.navigationDelegate = context.coordinator
webView.load(request)
return webView
}
func updateUIView(_ uiView: WKWebView, context: Context) {
}
class Coordinator : NSObject, WKNavigationDelegate {
var navigationState : NavigationState?
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
navigationState?.url = webView.url
}
}
}
struct ContentView: View {
@StateObject var navigationState = NavigationState()
var body: some View {
VStack(){
Text(navigationState.url?.absoluteString ?? "(none)")
WebView(request: URLRequest(url: URL(string: "https://www.google.com")!), navigationState: navigationState)
}
}
}
根据评论更新:
class NavigationState : NSObject, ObservableObject {
@Published var url : URL?
let webView = WKWebView()
}
extension NavigationState : WKNavigationDelegate {
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
self.url = webView.url
}
}
struct WebView : UIViewRepresentable {
let request: URLRequest
var navigationState : NavigationState
func makeUIView(context: Context) -> WKWebView {
let webView = navigationState.webView
webView.navigationDelegate = navigationState
webView.load(request)
return webView
}
func updateUIView(_ uiView: WKWebView, context: Context) { }
}
struct ContentView: View {
@StateObject var navigationState = NavigationState()
var body: some View {
VStack(){
Text(navigationState.url?.absoluteString ?? "(none)")
WebView(request: URLRequest(url: URL(string: "https://www.google.com")!), navigationState: navigationState)
HStack {
Button("Back") {
navigationState.webView.goBack()
}
Button("Forward") {
navigationState.webView.goForward()
}
}
}
}
}
你构建这个问题的方式(与我之前回答的问题相同)可能会影响它的工作方式。您可能想先解决这个问题。@jnpdx我刚才看到了您的答案。我相应地编辑了我的答案。再次感谢你的帮助!唯一的问题是我使用了其他函数,比如goBack goForward。如果我不将webView设置为变量,我不太确定如何调用goBack()函数。我更新了我的帖子,这样你就可以更好地理解了。我只是根据你的新要求更新了我的答案。