# iOS Add2App Life Cycle Test This application demonstrates some basic functionality for Add2App, along with a native iOS ViewController as a baseline and to demonstrate interaction. The following functionality is currently implemented: 1. A regular iOS view controller (UIViewController), similar to the default `flutter create` template (NativeViewController.m). 1. A FlutterViewController subclass that takes over the full screen. Demos showing this both from a cold/fresh engine state and a warm engine state (FullScreenViewController.m). 1. A demo of pushing a FlutterViewController on as a child view. 1. A demo of showing both the native and the Flutter views using a platform channel to interact with each other (HybridViewController.m). 1. A demo of showing two FlutterViewControllers simultaneously (DualViewController.m). A few key things are tested here (IntegrationTests.m): 1. The ability to pre-warm the engine and attach/detach a ViewController from it. 1. The ability to use platform channels to communicate between views. 1. The ability to simultaneously run two instances of the engine. 1. That a FlutterViewController can be freed when no longer in use (also tested from FlutterViewControllerTests.m). 1. That a FlutterEngine can be freed when no longer in use.