将javascript注入SwiftuiWebKit

如何将SwiftUI WebKit视图的文本大小设置为@State变量？我有这段代码，允许我在SwiftUI中使用WebView

import SwiftUI
import WebKit

struct WebView : UIViewRepresentable {

   var url : URL;

   func makeUIView(context: Context) -> WKWebView {
       return WKWebView();
   }

   func updateUIView(_ uiView: UIViewType, context: Context) {
       uiView.loadFileURL(url, allowingReadAccessTo: url)
   }
}

我看到并试图复制它

    class Coordinator : NSObject {
        func webView(_ webView: WKWebView, js : String) {
            webView.evaluateJavaScript(js)
        }
    }

但我没能让它工作

---

提前感谢。

加载完成后，您可以在导航代理中尝试执行此操作，如下所示：

class Coordinator : NSObject, WKNavigationDelegate {
    // ... any other code

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        webView.evaluateJavaScript(js, completionHandler: { (value, error) in
             // .. do anything needed with result, if any
        })
    }
}

struct WebView : UIViewRepresentable {

   var url : URL;

   func makeUIView(context: Context) -> WKWebView {
       let webview = WKWebView()
       webview.navigationDelegate = context.coordinator
       return webview
   }

    func makeCoordinator() -> Coordinator {
        Coordinator()
    }

   func updateUIView(_ uiView: UIViewType, context: Context) {
       uiView.loadFileURL(url, allowingReadAccessTo: url)
   }
}

---

加载完成后，您可以在导航委托中尝试执行此操作，如下所示：

class Coordinator : NSObject, WKNavigationDelegate {
    // ... any other code

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        webView.evaluateJavaScript(js, completionHandler: { (value, error) in
             // .. do anything needed with result, if any
        })
    }
}

struct WebView : UIViewRepresentable {

   var url : URL;

   func makeUIView(context: Context) -> WKWebView {
       let webview = WKWebView()
       webview.navigationDelegate = context.coordinator
       return webview
   }

    func makeCoordinator() -> Coordinator {
        Coordinator()
    }

   func updateUIView(_ uiView: UIViewType, context: Context) {
       uiView.loadFileURL(url, allowingReadAccessTo: url)
   }
}