in case web page show alert "This site is trying to open another application." alert not shown inside WebView window (works well on chrome mobile)

[oleksiivinogradov]

page https://myhome2.cfc.io/wc/

code:

WebViewObject webViewObject; IEnumerator StartWebView() { webViewObject = (new GameObject("WebViewObject")).AddComponent(); webViewObject.Init( cb: (msg) => { Debug.Log(string.Format("CallFromJS[{0}]", msg)); }, err: (msg) => { Debug.Log(string.Format("CallOnError[{0}]", msg)); }, httpErr: (msg) => { Debug.Log(string.Format("CallOnHttpError[{0}]", msg)); }, started: (msg) => { Debug.Log(string.Format("CallOnStarted[{0}]", msg)); }, hooked: (msg) => { Debug.Log(string.Format("CallOnHooked[{0}]", msg)); }, cookies: (msg) => { Debug.Log(string.Format("CallOnCookies[{0}]", msg)); }, ld: (msg) => { Debug.Log(string.Format("CallOnLoaded[{0}]", msg));

if UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX || UNITY_IOS

                // NOTE: the following js definition is required only for UIWebView; if
                // enabledWKWebView is true and runtime has WKWebView, Unity.call is defined
                // directly by the native plugin.

if true

                var js = @"
                if (!(window.webkit && window.webkit.messageHandlers)) {
                    window.Unity = {
                        call: function(msg) {
                            window.location = 'unity:' + msg;
                        }
                    };
                }
            ";

else

            // NOTE: depending on the situation, you might prefer this 'iframe' approach.
            // cf. https://github.com/gree/unity-webview/issues/189
            var js = @"
                if (!(window.webkit && window.webkit.messageHandlers)) {
                    window.Unity = {
                        call: function(msg) {
                            var iframe = document.createElement('IFRAME');
                            iframe.setAttribute('src', 'unity:' + msg);
                            document.documentElement.appendChild(iframe);
                            iframe.parentNode.removeChild(iframe);
                            iframe = null;
                        }
                    };
                }
            ";

endif

elif UNITY_WEBPLAYER || UNITY_WEBGL

            var js = @"
                window.Unity = {
                    call:function(msg) {
                        parent.unityWebView.sendMessage('WebViewObject', msg);
                    }
                };
            ";

else

            var js = "";

endif

                webViewObject.EvaluateJS(js + @"Unity.call('ua=' + navigator.userAgent)");
            },
            //transparent: false,
            //zoom: true,
            //ua: "custom user agent string",
            //radius: 0,  // rounded corner radius in pixel
            //// android
            //androidForceDarkMode: 0,  // 0: follow system setting, 1: force dark off, 2: force dark on
            //// ios
            enableWKWebView: true
            //wkContentMode: 0,  // 0: recommended, 1: mobile, 2: desktop
            //wkAllowsLinkPreview: true,
            //// editor
            //separated: false
            );

if UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX

        webViewObject.bitmapRefreshCycle = 1;

endif

        // cf. https://github.com/gree/unity-webview/pull/512
        // Added alertDialogEnabled flag to enable/disable alert/confirm/prompt dialogs. by KojiNakamaru · Pull Request #512 · gree/unity-webview
        webViewObject.SetAlertDialogEnabled(true);

        // cf. https://github.com/gree/unity-webview/pull/728
        //webViewObject.SetCameraAccess(true);
        //webViewObject.SetMicrophoneAccess(true);

        // cf. https://github.com/gree/unity-webview/pull/550
        // introduced SetURLPattern(..., hookPattern). by KojiNakamaru · Pull Request #550 · gree/unity-webview
        //webViewObject.SetURLPattern("", "^https://.*youtube.com", "^https://.*google.com");

        // cf. https://github.com/gree/unity-webview/pull/570
        // Add BASIC authentication feature (Android and iOS with WKWebView only) by takeh1k0 · Pull Request #570 · gree/unity-webview
        //webViewObject.SetBasicAuthInfo("id", "password");

        //webViewObject.SetScrollbarsVisibility(true);

        webViewObject.SetMargins(5, 100, 5, 100);// Screen.height / 50);
        webViewObject.SetTextZoom(100);  // android only. cf. https://stackoverflow.com/questions/21647641/android-webview-set-font-size-system-default/47017410#47017410
        webViewObject.SetVisibility(true);
        webViewObject.LoadURL("https://myhome2.cfc.io/wc/");

        yield break;

[KojiNakamaru]

This plugin doesn't forbid intents by default as it mainly targets trusted origins. You may utilize SetURLPattern() (cf. #550) to hook intents and show a warning dialog in unity.

Also, it might be better to utilize SFSafariViewController/Chrome Custom Tabs instead for your purpose. They are restricted but more compatible with Safari/Chrome. https://github.com/gree/unity-webview/tree/ac07c49acc27e72b2939c4be70bd5d05b1308855/appendix/sample-sfsafariviewcontroller-chromecustomtabs provides a simple example.

[KojiNakamaru]

I cannot help about how the metamask app works for the url. As noted before, it might be better to use SFSafariViewController/Chrome Custom Tabs. Moreover, it might be better to utilize MetaMask SDK: https://docs.metamask.io/wallet/how-to/use-sdk/mobile/ .