![]() ![]() Hopefully some other folks on Treehouse could provide more detail or refine my explanation. Specifically the section titled "Configuring windows" in Chapter 1. The view controller is now available to respond to eventsįor more details on how the view controller fits into your app's lifecycle, I found this book (Learning iOS UI Development by Yari D'areglia) to be very helpful in filling in the gaps of Apple's documentation.The storyboard includes an instance of ViewController. The application:didFinishLaunchingWithOptions: function is then called. Learn how to use the Xcode IDE and the iOS SDK to build your first app.The window is made visible and the view is displayed.The rootViewController property of the window property is set to the initial view controller in the "main" storyboard.A UIWindow object is instantiated and is used to set the window property on the AppDelegate class.Xcode templates include essential project configuration and files that help you start developing your app quickly. During the launch of your app, iOS determines which storyboard to use as the "main" storyboard (based on the settings in the ist) To create an Xcode project for your app, choose a template for the platform on which your app will run, and select the type of app you wish to develop, such as a single view, game, or document-based for iOS.Putting this all together, I would summarize the following: If your interface includes a table view or collection view, subclass UITable View Controller or UICollection View Controller instead. This diagram alludes to how the initial view is displayed and thus how the view controller is made available to respond to events from the user. Here is a link: App Programming Guide for iOS. It is easy to change the project format in the Xcode file inspector: But this is. Thus with no effort on your part, new projects have a main window in which to display their view controller content."Īlso, if you look at the "App Programming Guide for iOS", there is a diagram showing "The Launch Cycle" of an app. Using that template will make your life easier when creating your projects. Storyboards require the presence of a window property on the app delegate object, which the Xcode templates automatically provide. New iOS projects use storyboards to define the app’s views. ![]() "Providing your app’s main window is easy because Xcode does it for you. The UIWindow Class Reference says the following: There doesn't seem to be a resource that definitively answers your question, however I've managed to piece together a few sources that should give you a better idea as to what is happening under the hood. The reason you do not see any code related to the view controller in the AppDelegate.swift code is because it is being handled by iOS (UIKit framework) on your behalf (although it can also be done programmatically as well). Using the coordinator pattern in iOS apps lets us remove the job of app navigation from our view controllers, helping make them more manageable and more reusable, while also letting us adjust our apps flow whenever we need.
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