Feature/haptic feedback

[StriderHND]

This is a PR about the Feature Request #102 that the implementation of Haptic Feedback.

The usage of haptic feedback has been implemented using WKWebViewConfiguration and WKUserContentController to listen at the events of the webApp doing calls via webkit.messageHandlers on the Native side in the ViewController class is conforming the WKScriptMessageHandler protocol to get the type of data needed to perform the actions required by the webApp.

for example if we want to have a haptic action in any place of the webApp we have 3 feedback types:

1. heavy
2. medium
3. light

Execute the haptic we must add the following code in where we want the haptic happens:

<script>
 
  function hapticExampleFunction() {

      this is the main implementation the rest of the function can vary.
      window.webkit.messageHandlers.haptic.postMessage("light");
  }
  window.onload = hapticExampleFunction;

</script>

we could expand using the WKScriptMessageHandler to other webApp -> native communication because we can send JSON objects to the native side via the WKScriptMessage that supports basic dataTypes.

If you have questions, let me know

Erick

[benhalpern]

This looks really great. I'll review it within the next day.

[benhalpern]

Hmmmm in my first attempt, I'm getting the window.webkit.messagehandlers undefined error.

Seems to bring me here, but that is already in, right?

https://stackoverflow.com/questions/32771215/wkwebkit-javascript-on-loaded-page-finds-window-webkit-is-undefined

May be something more on my end. I'll keep testing. Have you tested it in any way on your machine by loading a local version of dev.to (or a dummy site that just triggers window.webkit.messageHandlers.haptic.postMessage("light");)?

[StriderHND]

Let me check that pretty fast because the handler lister is there. @benhalpern

I did some test in my local machine with a local dev.to and a dummy site.

[StriderHND]

@benhalpern I've made some changes from how the configuration for the webView is set. can you try again please.