[AC-6038] iOS: Ti.WKWebView cannot load local files or images

We are supposed to be replacing the use of UIWebView with WKWebView on iOS, but this is proving to be impossible for me as I cannot figure out how to load local resources such as images, JS or CSS files from the Resources directory or from the applicationDir or tempDir. I cannot find any evidence of this being possible. If it is possible, can some working sample code please be provided. Otherwise could support for this please be added urgently as this is a major limitation. *Sample code* Using a UIWebView the following code works:

var win = Ti.UI.createWindow({
  backgroundColor: 'white'
});

var html = '<img src="app://Resources/abc.jpg">';

var webview = Ti.UI.createWebView({
  html: html
});

win.add(webview);
win.open();

Note that in tiapp.xml is set to false so that the image can be referenced. The same code using WKWebView does not load the image. Changing the image src to use the native file path also does not work.