我将WKWebView放置在“列表”单元格中，并希望将此单元格自动调整为加载到WKWebView的内容的高度。我已经试过了这样的代码，但是没有用
struct WebView: UIViewRepresentable {
let url: URL?
let html: String?
let didFail: (WKNavigation) -> Void
let didFinish: (WKNavigation) -> Void
@Binding var contentHeight : CGFloat
init(html: String, contentHeight: Binding<CGFloat> = .constant(0), didFail: @escaping (WKNavigation) -> Void = { _ in }, didFinish: @escaping (WKNavigation) -> Void = { _ in }) {
self.url = nil
self.html = html
self.didFinish = didFinish
self.didFail = didFail
self._contentHeight = contentHeight
}
init(url: URL, contentHeight: Binding<CGFloat> = .constant(0), didFail: @escaping (WKNavigation) -> Void = { _ in }, didFinish: @escaping (WKNavigation) -> Void = { _ in }) {
self.url = url
self.html = nil
self.didFinish = didFinish
self.didFail = didFail
self._contentHeight = contentHeight
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.navigationDelegate = context.coordinator
webView.uiDelegate = context.coordinator
if let url = url {
let request = URLRequest(url: url)
webView.load(request)
} else if let html = html {
webView.loadHTMLString(html, baseURL: nil)
}
return webView
}
func updateUIView(_ webView: WKWebView, context: Context) {
}
class Coordinator : NSObject, WKNavigationDelegate, WKUIDelegate {
private let parent: WebView
init(_ parent: WebView) {
self.parent = parent
}
func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
parent.didFail(navigation)
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
webView.evaluateJavaScript("document.readyState", completionHandler: { (ready, error) in
if ready != nil {
webView.evaluateJavaScript("document.documentElement.scrollHeight", completionHandler: { (height, error) in
if let contentHeight = height as? CGFloat {
self.parent.contentHeight = contentHeight
}
})
}
})
parent.didFinish(navigation)
}
}
}
即使通过.frame(height: contentHeight)设置@State也不起作用。