当通过macOS本机应用程序中的SwiftUI WKWebView调用时，如何打开文件打开对话框？

Question

我目前正在运行一个由SwiftUI制作的简单化的WkWebView-我可以从this StackOverflow post中看到所有建议。它打开一个网站。该网站有一个浏览器按钮。如果单击Safari上的浏览器按钮，则会打开一个Finder窗口。如果我在用Xcode创建的.app中执行相同的操作，则Finder窗口不会打开。

这是我在沙箱中启用的内容：

我使用的代码是这个（全部来自ContentView.swift）

import SwiftUI
import WebKit


public struct WebBrowserView {

    private let webView: WKWebView = WKWebView()

    // ...

    public func load(url: URL) {
        webView.load(URLRequest(url: url))
    }

    public class Coordinator: NSObject, WKNavigationDelegate, WKUIDelegate {

        var parent: WebBrowserView

        init(parent: WebBrowserView) {
            self.parent = parent
        }

        public func webView(_: WKWebView, didFail: WKNavigation!, withError: Error) {
            // ...
        }

        public func webView(_: WKWebView, didFailProvisionalNavigation: WKNavigation!, withError: Error) {
            // ...
        }

        public func webView(_: WKWebView, didFinish: WKNavigation!) {
            // ...
        }

        public func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
            // ...
        }

        public func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
            decisionHandler(.allow)
        }

        public func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
            if navigationAction.targetFrame == nil {
                webView.load(navigationAction.request)
            }
            return nil
        }
    }

    public func makeCoordinator() -> Coordinator {
        Coordinator(parent: self)
    }
}


#if os(macOS) // macOS Implementation (iOS version omitted for brevity)
extension WebBrowserView: NSViewRepresentable {

    public typealias NSViewType = WKWebView

    public func makeNSView(context: NSViewRepresentableContext<WebBrowserView>) -> WKWebView {

        webView.navigationDelegate = context.coordinator
        webView.uiDelegate = context.coordinator
        return webView
    }

    public func updateNSView(_ nsView: WKWebView, context: NSViewRepresentableContext<WebBrowserView>) {

    }
}
#endif

struct BrowserView: View {

    private let browser = WebBrowserView()

    var body: some View {
        HStack {
            browser
                .onAppear() {
                    self.browser.load(url: URL(string: "http://specificwebsitewithbrowserbutton")!)
                }
        }
        .padding()
    }
}


struct ContentView: View {

    @State private var selection = 1

    var body: some View {
                BrowserView()
                .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}

因此，我如何赋予此.app足够的权限，以便在我单击网站上的“上传”按钮时打开Finder窗口？

Answer 1

   /** @abstract Displays a file upload panel.
     @param webView The web view invoking the delegate method.
     @param parameters Parameters describing the file upload control.
     @param frame Information about the frame whose file upload control initiated this call.
     @param completionHandler The completion handler to call after open panel has been dismissed. Pass the selected URLs if the user chose OK, otherwise nil.

     If you do not implement this method, the web view will behave as if the user selected the Cancel button.
     */
    @available(OSX 10.12, *)
    optional func webView(_ webView: WKWebView, runOpenPanelWith 
                  parameters: WKOpenPanelParameters, initiatedByFrame frame: WKFrameInfo, 
                  completionHandler: @escaping ([URL]?) -> Void)

这里是实施示例

func webView(_ webView: WKWebView, runOpenPanelWith parameters: WKOpenPanelParameters, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping ([URL]?) -> Void) {
    let openPanel = NSOpenPanel()
    openPanel.canChooseFiles = true
    openPanel.begin { (result) in
        if result == NSApplication.ModalResponse.OK {
            if let url = openPanel.url {
                completionHandler([url])
            }
        } else if result == NSApplication.ModalResponse.cancel {
            completionHandler(nil)
        }
    }
}