Orion iOS test task

Use UIKit and WebKit in Swift to implement web page navigation, page zoom, and app state restoration features.

Minimum deployment target: iOS 13.0

Tasks

• WKWebView and bottom toolbar back/forward(/refresh) navigation buttons
• Start view with centered start button which load a URL in WKWebView full screen
  • Top progress bar appear on loading a URL, fade out with animation on finishing loading
• Page zoom gestures
• Back/forward buttons navigation:
  • Through WKWebView.backForwardList and between start view and WKWebView
  • Corresponding enabled states of back/forward(/refresh) buttons
• Screen edge pan gestures navigation:
  • Through WKWebView.backForwardList and between start view and WKWebView
  • Corresponding enabled states of back/forward(/refresh) buttons
• Save/restore WKWebView navigation history between app launches
  • Implemented all methods listed in the two articles About the UI preservation process and About the UI restoration process (demonstrated in the two diagrams below).
  • Specified restorationIdentifier values of ViewController, the root UINavigationController, ViewController.view, ViewController.progressBar, and ViewController.webView.
  • Specified restorationClass values of ViewController.
  • Defined a Swift structure BrowserState that stores two properties webViewInteractionState and fullWebViewVisibleState for preserving and restoring ViewController.webView.interactionState (browsing history) and ViewController.fullWebViewVisibleState (webView visible state and back/forward button enabled states).
  • Store and load BrowserState records in the local file system with the help of FileManager.
  • State (browsing history) restoration does not work right now.

UI Preservation	UI Restoration

Package Dependencies

• SwiftLog: logging
• SwiftLint: format and style enforcement

Demo Video Clips

Load WKWebView:

First load	Refresh
wkwebview.mov	refresh_button.mov

WKWebView back/forward navigations:

Buttons	Gestures
wkwebview_back_forward_buttons.mov	wkwebview_back_forward_gestures.mov

Back/forward navigations between WKWebView and start view

Buttons	Gestures
start_view_back_forward_buttons.mov	start_view_back_forward_gestures.mov