Usage of Motion Sensors with InAppLocalHostServer

[aatmmr]

First of all, thank you for creating this package which is highly useful and flexible.

We would like to run a simple HTML5 game in the WebView which is loaded via InAppLocalHostServer. The game uses motion sensors as user controls which works prior to iOS 14 without any issues. Since iOS 14, the user must consent the sensor usage. Using permission_handler requesting the constent works but does not apply to the game running on the localhost. If we add a separate permission request to the game itself, an alert will show up asking:

"localhost" Would Like To Access Motion and Orientation.

Giving consent to the usage will make the game work - so far so good.

However, for a better UX, is it possible to:

• Change "localhost" or the consent request to a custom text?
• Pass the consent somehow to the localhost instance, such as, for camera or microphone as described in package docs?

Or am I missing something?

The app runs on package version 5.3.0 and flutter stable branch.

[github-actions]

👋 @aatmmr

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[kuhnroyal]

I also can't get motion events to work for a page server from a local file. But I think this is related to InAppWebView and not InAppLocalHostServer.

There is this https://bugs.webkit.org/show_bug.cgi?id=203287 saying that the WKUIDelegate needs to be set, but I think it is set.

There are also these new delegate methods for iOS 15: https://developer.apple.com/documentation/webkit/wkuidelegate?changes=latest_minor&language=objc

[kuhnroyal]

Hacking this into InAppWebView.swift:

    @available(iOS 15.0, *)
    public func webView(_ webView: WKWebView,
           requestDeviceOrientationAndMotionPermissionFor origin: WKSecurityOrigin,
                initiatedByFrame frame: WKFrameInfo,
                 decisionHandler: @escaping (WKPermissionDecision) -> Void) {
         decisionHandler(.grant)
     }

And combining it with some javascript after user interaction seems to work:

    DeviceMotionEvent.requestPermission().then(response => {
        console.log(response)
    }).catch(console.error);

Just need some way to remember this permission. Currently I need to grant it again every time the app is started.

[kuhnroyal]

I added a PR which allows to support this on iOS 15+.
I have not found a way to do this for older versions (13/14).