WebView iOS cookie issue

Tell us about the problem

web-view for iOS is not automatically passing the cookies after the recent change of iOS UIWebView to WKWebView(https://github.com/NativeScript/NativeScript/pull/5093)

Previous Nativescript "web-view" was using UIWebView and native code cookies(using NSURLConnection/NSURISession) is shared and the application worked fine.

We are using this feature for authentication cookies to be shared between native and web-view.

Also, I don't see easy way to set the http cookie for the current NativeScript web-view ui control.

Take a look the following link for ways to set cookie for WKWebView

https://stackoverflow.com/questions/26573137/can-i-set-the-cookies-to-be-used-by-a-wkwebview

Which platform(s) does your issue occur on?

iOS

Please provide the following version numbers that your issue occurs with:

• CLI: (run tns --version to fetch it)

$ tns --version
3.5.0-2017-12-20-10289

• Cross-platform modules: (check the 'version' attribute in the
  node_modules/tns-core-modules/package.json file in your project)

  "typings": "tns-core-modules.d.ts",
  "version": "3.4.0"

• Runtime(s): (look for the "tns-android" and "tns-ios" properties in the
  package.json file of your project)

   "tns-ios": {
      "version": "3.4.0-rc-2017-12-4-1"
    }

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Start by reviewing PR #5093 and the linked WKWebView cookie-setting approaches. Reproduce the iOS WebView authentication flow with the reported NativeScript versions, then verify that cookies are shared with native code and can be set for the current WebView control.