iOS InAppWebView: With resizeToAvoidBottomInset: true, the white padding area above the keyboard is too large, causing content to disappear off the top

[gerri0098]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

1. Use InAppWebView with resizeToAvoidBottomInset: true.
2. An input field Inside a web drawer.
3. Tap the input field on an iOS device (e.g., iPhone 14, iOS 18).
4. Observe the content shift.

Expected Behavior

Content adjusts to stay visible above the keyboard

Steps with code example to reproduce

Steps with code example to reproduce

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: true, // keyboard
      body: ColorfulSafeArea(
        color: AppColors.statusBarColor,
        child: InlineWebview(
          webviewKey,
          AppSettings.appUrl,
          AppSettings.appTitle,
        ),
      ),
    );
  }

......

InAppWebViewSettings webViewSettings = InAppWebViewSettings(
    useShouldOverrideUrlLoading: true,
    mediaPlaybackRequiresUserGesture: false,
    useHybridComposition: true,
    allowsInlineMediaPlayback: true,
    // allow http
    mixedContentMode: MixedContentMode.MIXED_CONTENT_ALWAYS_ALLOW,
    allowFileAccessFromFileURLs: true,
    allowUniversalAccessFromFileURLs: true,
    allowFileAccess: true,
    allowContentAccess: true,

    // viewport
    enableViewportScale: true,

    // keyboard
    contentInsetAdjustmentBehavior:
        ScrollViewContentInsetAdjustmentBehavior.AUTOMATIC,

    // for google auth
    userAgent: AppSettings.userAgentApp,
    javaScriptEnabled: true,
    useOnLoadResource: true,
    cacheEnabled: kDebugMode ? false : true,
    applicationNameForUserAgent: AppSettings.appName,
    disableDefaultErrorPage: true,
    sharedCookiesEnabled: true,
    supportMultipleWindows: true,

    // allow debug
    isInspectable: true,
  );

......

InAppWebView(
        key: webViewKey,
        initialUrlRequest: URLRequest(url: WebUri(widget.url)),
        initialSettings: webViewSettings,

Stacktrace/Logs

Stacktrace/Logs

<Replace this line by pasting your stacktrace or logs here>

Flutter version

Flutter 3.29.2 • channel stable

Operating System, Device-specific and/or Tool

iOS 18.3.2

Plugin version

v6.0.0, v6.1.5, v6.2.0-beta.2

Additional information

I tested native WKWebView in SwiftUI, and it doesn't have this issue. The white padding area above the keyboard is appropriately sized, around a few dozen pixels, and doesn’t push content off-screen.
This issue occurs only on iOS; Android devices do not exhibit this problem.

Self grab

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