Question

我想在iOS 13+的DeviceMotion中使用DeviceOrientation和WKWebView事件。我正在使用以下代码

<html>
    <style>
        #container{
            margin: 20px; 
            padding: 20px
        }
        #deviceType{
            text-align: center; 
            font-family: Arial, Helvetica, sans-serif; 
            font-size: 3rem;
            font-weight: bold; 
            color: #08f
        }
        #permission{
            padding: 2rem 5rem;
            background: #08f;
            color: white; 
            margin-top: 30;
            font-family: Arial, Helvetica, sans-serif; 
            font-size: 3rem;
            border: none; 
            border-radius: 1rem
        }
        #permissionStatus{
            text-align: center; 
            font-family: Arial, Helvetica, sans-serif; 
            font-size: 2.5rem;
            font-weight: 600; 
            color: red;
            margin-top: 30px
        }
    </style>
    <body>
        <div id="container">
                <div id="deviceType"></div>
                <div style="text-align: center">
                    <button id="permission">Ask for permission</button>
                </div>
                <div id="permissionStatus">Pending</div>
        </div>
    </body>
    <script>

        if (typeof DeviceMotionEvent.requestPermission === 'function') {
            document.getElementById('deviceType').innerText = 'iOS 13'
            document.getElementById('permission').addEventListener('click', function () {
                console.log('button clicked')
                DeviceMotionEvent.requestPermission().then(response => {

                    // This is showing "denied" without showing any permission popup
                    console.log(response)
                    document.getElementById('permissionStatus').innerText = response

                }).catch(console.error)
            });
        } else {
            // ignore this case for processing
            console.log('non iOS 13')
            document.getElementById('deviceType').innerText = 'non iOS 13'
        }
    </script>
</html>

此网页可同时在Safari和Chrome中运行，并要求允许使用设备运动，如下所示

图片：

状态将根据我单击“允许”或“取消”进行更新

但是在我的应用程序内部，我使用的是WKWebView，当我按询问许可权按钮时，它没有显示任何询问许可权的警报，而是直接将状态设置为拒绝。（如下所示）。

如果我做错了任何事情，或者从WKWebView方面需要任何其他东西，请指导我。这是我的iOS WKWebView代码。我不知道是否需要更改WKUserContentController或WKWebViewConfiguration。

self.webView = WKWebView(frame: .zero)
self.webView.translatesAutoresizingMaskIntoConstraints = false

// Add the webview as a subview of MTKView
self.view.addSubview(self.webView)

self.webView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
self.webView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
self.webView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
self.webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true


let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
let date = Date(timeIntervalSince1970: 0)
WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes as! Set<String>, modifiedSince: date, completionHandler:{ })

self?.webView.load(URLRequest(url: URL(string: url)!))

Answer 1

我尝试使用uiDelegate并有效

只需在viewDidLoad内添加一行

webView.uiDelegate = self

您还必须确认ViewController至WKUIDelegate的类型。就这样

Answer 2

在Xamarin iOS（Xamarin.Forms）上，准备就绪时，可以在WkWebView上使用EvaluateJavaScript方法注入权限请求脚本：

webView.EvaluateJavaScript("DeviceMotionEvent.requestPermission().then(response => { if (response == 'granted') {window.addEventListener('devicemotion', (e) => {})}}).catch(console.error)");

如果使用自定义的WkWebView渲染器，则可以在OnElementChanged中设置webView控件时注入脚本（如果此错误仍在https://bugs.webkit.org/show_bug.cgi?id=203287周围，则必须实现IWKUIDelegate）

示例：

// do this when setting up the webview control in OnElementChanged
                //enable device motion sensors permission script:
                //https://medium.com/flawless-app-stories/how-to-request-device-motion-and-orientation-permission-in-ios-13-74fc9d6cd140
                var source =
                "function requestSensorPermission() {" +
                "   if (typeof(DeviceMotionEvent) !== 'undefined' && typeof(DeviceMotionEvent.requestPermission) === 'function') {" +
                "       DeviceMotionEvent.requestPermission() .then(response => {" +
                "           if (response == 'granted') { " +
                "               window.addEventListener('devicemotion', (e) => { })" +
                "           }" +
                "       }).catch(console.error)" +
                "   }" +
                "}";
                var script = new WKUserScript(new NSString(source), WKUserScriptInjectionTime.AtDocumentEnd, true);
                wkWebView.Configuration.UserContentController.AddUserScript(script);

然后，您可以在代码WkWebView准备就绪后，在代码后调用 yourCustomWebView 。EvaluateJavaScript（“ requestSensorPermission（）”）。

评估JavaScript： https://docs.microsoft.com/en-us/dotnet/api/webkit.wkwebview.evaluatejavascript?view=xamarin-ios-sdk-12

自定义WkWebView渲染器： https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/custom-renderer/hybridwebview#create-the-custom-renderer-on-ios

WKWebView iOS 13中的DeviceMotion和DeviceOrientation

2 个答案: