A custom modal transition that presents a controller with an expanding effect while sliding out the presenter remnants.
Simply copy the Sources/DAExpandAnimation/DAExpandAnimation.swift file into your project.
DAExpandAnimation is also available through Swift Package Manager.
.package(url: "https://github.com/ifitdoesntwork/DAExpandAnimation.git", from: "1.0.0")Try the example project!
Have your view controller conform to UIViewControllerTransitioningDelegate. Optionally set the collapsedViewFrame, the expandedViewFrame, the slidingPart and the animationDuration.
private let animationController = DAExpandAnimation() override func prepare(for segue: UIStoryboardSegue, sender: Any?) { guard let selectedCell = sender as? UITableViewCell else { return } let toViewController = segue.destination toViewController.transitioningDelegate = self toViewController.modalPresentationStyle = .custom toViewController.view.backgroundColor = selectedCell.backgroundColor animationController.collapsedViewFrame = { selectedCell.frame } animationController.animationDuration = Constants.demoAnimationDuration() } func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? { animationController } func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? { animationController }Adopting DAExpandAnimationPresentingViewAdapter provides the following optional delegate methods for tailoring the presenter's UX.
/// Determines whether the animations include sliding the presenter's view apart. /// Defaults to `true`. var shouldSlideApart: Bool { get } /// Notifies the presenter's view adapter that animations are about to occur. func animationsWillBegin(in view: UIView, presenting isPresentation: Bool) /// Notifies the presenter's view adapter that animations are just completed. func animationsDidEnd(presenting isPresentation: Bool)Adopting DAExpandAnimationPresentedViewAdapter provides the following optional delegate methods for tailoring the presentation of a new view controller.
/// Gives the presented view adapter a chance to prepare /// the expanding `view` before the animations. func prepare(expanding view: UIView) /// Gives the presented view adapter ability to change /// properties of the expanding `view` alongside the animations. func animate(expanding view: UIView) /// Gives the presented view adapter ability to clean the expanded `view` up /// after the animations are performed. func cleanup(expanding view: UIView) /// Gives the presented view adapter a chance to prepare /// the collapsing `view` before the animations. func prepare(collapsing view: UIView) /// Gives the presented view adapter ability to change /// properties of the collapsing `view` alongside the animations. func animate(collapsing view: UIView) /// Gives the presented view adapter ability to clean the collapsed `view` /// up after the animations are performed. func cleanup(collapsing view: UIView)