在 SwiftUI 中关闭 WKWebView

Posted 2023-04-13

【中文标题】在 SwiftUI 中关闭 WKWebView

【英文标题】：Dismiss WKWebView in SwiftUI

【发布时间】：2020-08-19 23:57:52

【问题描述】：

我是 Swift 新手并使用 SwiftUI 构建应用程序。

我正在使用类似于我在下面编写的代码来显示 WKWebView。

struct SomeView: View 

    @State var showWebView = false

    var body: some View 
        ZStack 
            Button(action: 
                self.showWebView.toggle()

            ) 
                Text("Go To WebView")
                    .padding()
                    .foregroundColor(.black)
                    .font(.title)
            
            .sheet(isPresented: $showWebView, content: 
                WebView(url: "https://www.apple.com/")
            )
        
    


struct WebView: UIViewRepresentable 

    var url: String

    func makeCoordinator() -> Coordinator 
        return Coordinator()
    

    func makeUIView(context: Context) -> WKWebView 
        let webView = WKWebView()
        return webView
    

    func updateUIView(_ uiView: WebView.UIViewType, context: UIViewRepresentableContext<WebView>) 
        let urlRequest = URLRequest.init(url: URL.init(string: self.url)!)
        uiView.navigationDelegate = context.coordinator
        uiView.load(urlRequest)
    


class Coordinator: NSObject, WKNavigationDelegate 

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction,
                 decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) 
        if let url = navigationAction.request.url?.absoluteString 
            if url.contains("apple") 
                let someViewModel = SomeViewModel()
                someViewModel.processRequest(url: url)
            
        
        decisionHandler(.allow)
    

代码按预期工作。我能够显示显示所需网站的 WKWebView。但是，一旦我调用了someViewModel.processRequest()，我正在努力弄清楚如何关闭 WKWebView 并导航到另一个页面。你能帮忙吗？

【参考方案1】：

我会对整个 WebView 做一些不同的事情，这应该（据我了解您的问题）解决您的情况：

import SwiftUI
import SafariServices

struct SomeView: View 

    @State var showWebView = false

    var body: some View 
        ZStack 
            Button(action: 
                self.showWebView.toggle()

            ) 
                Text("Go To WebView")
                    .padding()
                    .foregroundColor(.black)
                    .font(.title)
            
            .sheet(isPresented: $showWebView, content: 
                WebView(url: URL(string: "https://www.apple.com/")!) )

        
    


struct WebView: UIViewControllerRepresentable 

    let url: URL

    func makeUIViewController(context: UIViewControllerRepresentableContext<WebView>) -> SFSafariViewController 
        return SFSafariViewController(url: url)
    

    func updateUIViewController(_ uiViewController: SFSafariViewController, context: UIViewControllerRepresentableContext<WebView>)