import SwiftUI
import WebKit
struct WebView: UIViewRepresentable {
let htmlContent: String
let onHeightChange: (CGFloat) -> Void
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.navigationDelegate = context.coordinator
webView.scrollView.isScrollEnabled = false
// Message Handler hier einmalig hinzufügen
webView.configuration.userContentController.add(context.coordinator, name: "heightUpdate")
context.coordinator.onHeightChange = onHeightChange
return webView
}
func updateUIView(_ webView: WKWebView, context: Context) {
// Nur den HTML-Inhalt laden, keine Handler-Konfiguration
context.coordinator.onHeightChange = onHeightChange
let styledHTML = """
\(htmlContent)
"""
webView.loadHTMLString(styledHTML, baseURL: nil)
}
func makeCoordinator() -> WebViewCoordinator {
WebViewCoordinator()
}
}
class WebViewCoordinator: NSObject, WKNavigationDelegate, WKScriptMessageHandler {
var onHeightChange: ((CGFloat) -> Void)?
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .linkActivated {
if let url = navigationAction.request.url {
UIApplication.shared.open(url)
decisionHandler(.cancel)
return
}
}
decisionHandler(.allow)
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
if message.name == "heightUpdate", let height = message.body as? CGFloat {
DispatchQueue.main.async {
self.onHeightChange?(height)
}
}
}
deinit {
// Der Message Handler wird automatisch mit der WebView entfernt
}
}