iOS 16.1下自定义键盘扩展WKWebView内容无法加载求助

API 探路者

2026-8-14

iOS 16.1真机上键盘扩展WKWebView白屏问题

我有一个基础键盘扩展，在iOS 15系统下运行正常，升级到iOS 16.1后出现异常。该键盘包含一个WKWebView，用于渲染带文本的基础HTML页面。在iOS 16模拟器上所有内容加载正常，但真机运行时出现白屏（WKWebView已加载但内容未显示），同时产生大量错误日志（日志取自「备忘录」应用中测试键盘的过程）。

键盘扩展代码

func makeViewConfiguration() -> WKWebViewConfiguration
{
    let configuration = WKWebViewConfiguration()
    let dropSharedWorkersScript = WKUserScript(source: "delete window.SharedWorker;", injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: false)
    configuration.userContentController.addUserScript(dropSharedWorkersScript)
    return configuration
}

override func viewDidLoad() {
    super.viewDidLoad()
    popup = UIView()
    popup.autoresizingMask = [.flexibleWidth, .flexibleHeight]
    
    webView = WKWebView(frame: CGRect(x:100, y:100, width:100, height:350), configuration: makeViewConfiguration())
    webView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
    webView.frame = CGRect(origin: CGPoint.zero, size: popup.frame.size)
    webView.backgroundColor = UIColor.white
    webView.uiDelegate = self

    let contentController = webView.configuration.userContentController
    contentController.add(self, name: "toggleMessageHandler")

    popup.addSubview(webView)

    
    webView.loadHTMLString("<html><body><p>Hello!</p></body></html>", baseURL: nil)
    
    popup.backgroundColor = UIColor.cyan;
   
    self.view.addSubview(popup)
   
}