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1. #Control a quartzcode animation from xcode update#
2. #Control a quartzcode animation from xcode code#
3. #Control a quartzcode animation from xcode download#

In animateTransition(using:), you have access to both the current view controller on the screen as well as the new view controller to be presented. This is when your custom animation gets to take center stage. UIKit first asks your animation controller - simply known as the animator - for the transition duration in seconds, then calls animateTransition(using:) on it. There are a few more steps in the dance before UIKit can use the custom animation controller:

If UIKit receives a UIViewControllerAnimatedTransitioning object instead, then UIKit uses that object as the animation controller for the transition. If that method returns nil, UIKit uses the built-in transition. UIKit calls animationController(forPresented:presenting:source:) to see if it returns a UIViewControllerAnimatedTransitioning object. Here’s what the first step of the custom transitioning dance looks like: You simply make your main view controller, or another class you create specifically for that purpose, conform to UIViewControllerTransitioningDelegate.Įvery time you present a new view controller, UIKit asks its delegate whether or not it should use a custom transition. UIKit lets you customize your view controller’s presentation via the delegate pattern. Roll up your sleeves, put your developer apron on and get ready for the inner workings of custom presentation controllers! Behind the Scenes of Custom Transitions Your job is to add some custom presentation controller animations to your app to make it blossom! You’ll replace the current stock animation with one that expands the tapped recipe image to a full-screen view like so: That might be OK, but your recipes deserve better! Tap on one of the recipe image, and the details screen comes up via the standard vertical cover transition. Build and run the app to see how the app looks and feels:

#Control a quartzcode animation from xcode code#

There’s already enough code in HomeViewController.swift and DetailsViewController.swift to support the basic app. This view controller sports an image, a title and a description. HomeViewController presents DetailsViewController whenever the user taps one of the images in the list.

The first view controller, HomeViewController, contains the app’s recipe list. Open the starter project and select Main.storyboard to begin the tour:

#Control a quartzcode animation from xcode download#

Getting Startedĭownload the project materials using the Download Materials button at the top or bottom of this tutorial. In this iOS animation tutorial, you’ll create your own custom presentation controller transitions to replace the default one and liven up this tutorial’s project. The illustration below shows a “New Contact” view controller sliding up over the list of contacts: This method “gives up” the current screen to another view controller using the default presentation animation to slide the new view up to cover the current one. Transitions are always called with the same UIKit method: present(_:animated:completion:). Whether you’re presenting the camera view controller or one of your own custom-designed modal screens, it’s important to understand how these transitions are happening.

#Control a quartzcode animation from xcode update#

Update note: Fabrizio Brancati updated this tutorial for iOS 12, Xcode 10.2 and Swift 5.