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Release 1.0.1 (#4)
Release `1.0.1`
2 parents 98af23a + f57dc1e commit 98decea

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‎CHANGELOG.md‎

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# Change Log
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All notable changes to this project will be documented in this file.
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#### 1.x Releases
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- `1.0.x` Releases - [1.0.0](#100) | [1.0.1](#101)
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## [1.0.1](https://github.com/space-code/transitions/releases/tag/1.0.1)
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Released on 2025-02-10.
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#### Added
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- Implement `CoreTransition`.
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- Added in Pull Request [#93](https://github.com/space-code/transitions/pull/3)
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## [1.0.0](https://github.com/space-code/transitions/releases/tag/1.0.0)
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Released on 2025-01-13.
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‎Sources/Transitions/Classes/Core/CoreTransition.swift‎

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//
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// transitions
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// Copyright © 2025 Space Code. All rights reserved.
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//
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import UIKit
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// MARK: - CoreTransition
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/// A core transition class.
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/// Provides functionality for handling custom view controller transitions.
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open class CoreTransition: NSObject, ICoreTransition {
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// MARK: Properties
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/// The duration of the transition animation, measured in seconds.
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public let animationDuration: TimeInterval
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/// A flag indicating whether the transition is for presenting (`true`) or dismissing (`false`) a view controller.
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public private(set) var isPresenting = false
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/// The view controller that is presenting the view controller in the presented parameter.
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public private(set) weak var presentingViewController: UIViewController?
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/// The view controller object that is about to be presented onscreen.
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public private(set) weak var presentedViewController: UIViewController?
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/// The context object containing information about the transition.
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public private(set) weak var transitionContext: UIViewControllerContextTransitioning?
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/// This is the target view controller that will be presented after the transition.
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public private(set) weak var toViewController: UIViewController?
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/// This is the currently visible view controller before the transition begins.
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public private(set) weak var fromViewController: UIViewController?
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/// Determine if the transition is interactive.
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public private(set) var isInteractive = false
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/// The source view controller.
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weak var owningController: UIViewController?
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/// The container view serves as the parent view that holds both the from-view and to-view during the transition.
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public private(set) weak var transitionContainerView: UIView?
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/// An object that drives an interactive animation between one view controller and another.
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private var interactionController: UIPercentDrivenInteractiveTransition?
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// MARK: Initialization
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/// Initializes a new instance of the `CustomTransition` class.
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///
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/// - Parameter animationDuration: The duration of the transition animation, measured in seconds.
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public init(animationDuration: TimeInterval) {
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self.animationDuration = animationDuration
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}
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// MARK: ICoreTransition
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open func performTransition() {}
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open func performDismissTransition() {}
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// MARK: Public
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open func prepareForTransition(interactive _: Bool) {}
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// MARK: Internal
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func prepareTransitionParameters() {}
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/// Completes the current transition and cleans up the transition state.
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///
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/// - Parameter completion: An optional closure called with a Boolean value
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/// indicating whether the transition was successful (`true`) or cancelled (`false`).
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@MainActor
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open func completeTransaction(completion: ((Bool) -> Void)? = nil) {
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guard let transitionContext else {
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completion?(false)
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return
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}
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let isFinished = !transitionContext.transitionWasCancelled
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completion?(isFinished)
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transitionContext.completeTransition(isFinished)
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self.transitionContext = nil
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presentedViewController = nil
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presentingViewController = nil
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}
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}
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// MARK: IInteractiveTransition
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extension CoreTransition: IInteractiveTransition {
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public func beginInteractiveDismissalTransition() {
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interactionController = UIPercentDrivenInteractiveTransition()
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owningController?.dismiss(animated: true)
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}
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public func updateInteractiveTransitionToProgress(progress: CGFloat) {
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interactionController?.update(progress)
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}
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public func cancelInteractiveTransition() {
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interactionController?.completionSpeed = 0.999
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interactionController?.cancel()
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interactionController = nil
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}
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public func finishInteractiveTransition() {
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interactionController?.finish()
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interactionController = nil
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}
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}
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// MARK: UIViewControllerAnimatedTransitioning
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extension CoreTransition: UIViewControllerAnimatedTransitioning {
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open func transitionDuration(using _: (any UIViewControllerContextTransitioning)?) -> TimeInterval {
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animationDuration
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}
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open func animateTransition(using transitionContext: any UIViewControllerContextTransitioning) {
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self.transitionContext = transitionContext
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fromViewController = transitionContext.viewController(forKey: .from)
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toViewController = transitionContext.viewController(forKey: .to)
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isInteractive = transitionContext.isInteractive
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transitionContainerView = transitionContext.containerView
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prepareTransitionParameters()
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prepareForTransition(interactive: isInteractive)
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if isPresenting {
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performTransition()
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} else {
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performDismissTransition()
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}
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}
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}
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// MARK: UIViewControllerTransitioningDelegate
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extension CoreTransition: UIViewControllerTransitioningDelegate {
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public func animationController(
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forPresented presented: UIViewController,
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presenting: UIViewController,
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source _: UIViewController
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) -> (any UIViewControllerAnimatedTransitioning)? {
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presentingViewController = presenting
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presentedViewController = presented
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isPresenting = true
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return self
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}
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public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
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presentingViewController = dismissed
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presentedViewController = dismissed.presentingViewController
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isPresenting = false
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return self
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}
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open func presentationController(
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forPresented _: UIViewController,
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presenting _: UIViewController?,
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source _: UIViewController
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) -> UIPresentationController? {
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nil
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}
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}

‎Sources/Transitions/Classes/Core/Extensions/UIViewController+CustomTransition.swift‎

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public extension UIViewController {
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/// A custom transition object associated with the view controller.
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var customTransition: CustomTransition? {
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var customTransition: CoreTransition? {
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get {
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withUnsafePointer(to: &AssociatedKeys.customTransitionKey) {
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objc_getAssociatedObject(self, $0) as? CustomTransition
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objc_getAssociatedObject(self, $0) as? CoreTransition
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}
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}
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set {

‎Sources/Transitions/Classes/CustomTransition.swift‎

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/// A custom transition class.
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/// Provides functionality for handling custom view controller transitions.
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open class CustomTransition: NSObject, ICoreTransition {
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open class CustomTransition: CoreTransition {
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// MARK: Properties
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/// The duration of the transition animation, measured in seconds.
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public let animationDuration: TimeInterval
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/// A flag indicating whether the transition is for presenting (`true`) or dismissing (`false`) a view controller.
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public private(set) var isPresenting = false
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/// The view controller that is presenting the view controller in the presented parameter.
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public private(set) weak var presentingViewController: UIViewController?
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/// The view controller object that is about to be presented onscreen.
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public private(set) weak var presentedViewController: UIViewController?
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/// The context object containing information about the transition.
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public private(set) weak var transitionContext: UIViewControllerContextTransitioning?
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/// This is the target view controller that will be presented after the transition.
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public private(set) weak var toViewController: UIViewController?
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/// This is the currently visible view controller before the transition begins.
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public private(set) weak var fromViewController: UIViewController?
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/// Determine if the transition is interactive.
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public private(set) var isInteractive = false
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/// The source view controller.
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weak var owningController: UIViewController?
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/// The container view serves as the parent view that holds both the from-view and to-view during the transition.
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public private(set) weak var transitionContainerView: UIView?
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/// An object that drives an interactive animation between one view controller and another.
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private var interactionController: UIPercentDrivenInteractiveTransition?
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/// This represents the view's transformation state before the transition begins.
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public private(set) var intitialTransform: CGAffineTransform?
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/// This represents the view's transformation state after the transition is completed.
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public private(set) var finalTransform: CGAffineTransform?
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// MARK: Initialization
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/// Initializes a new instance of the `CustomTransition` class.
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///
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/// - Parameter animationDuration: The duration of the transition animation, measured in seconds.
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public init(animationDuration: TimeInterval) {
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self.animationDuration = animationDuration
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}
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// MARK: ICoreTransition
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open func performTransition() {}
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open func performDismissTransition() {}
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// MARK: Public
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// MARK: Internal
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open func prepareForTransition(interactive _: Bool) {}
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/// Completes the current transition and cleans up the transition state.
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///
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/// - Parameter completion: An optional closure called with a Boolean value
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/// indicating whether the transition was successful (`true`) or cancelled (`false`).
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@MainActor
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open func completeTransaction(completion: ((Bool) -> Void)? = nil) {
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guard let transitionContext else {
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completion?(false)
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return
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}
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let isFinished = !transitionContext.transitionWasCancelled
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completion?(isFinished)
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transitionContext.completeTransition(isFinished)
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self.transitionContext = nil
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presentedViewController = nil
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presentingViewController = nil
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}
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// MARK: Private
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private func prepareTransitionParameters() {
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override func prepareTransitionParameters() {
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guard let toViewController,
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let fromViewController,
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let transitionContext,
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}
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}
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}
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// MARK: IInteractiveTransition
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extension CustomTransition: IInteractiveTransition {
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public func beginInteractiveDismissalTransition() {
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interactionController = UIPercentDrivenInteractiveTransition()
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owningController?.dismiss(animated: true)
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}
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public func updateInteractiveTransitionToProgress(progress: CGFloat) {
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interactionController?.update(progress)
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}
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public func cancelInteractiveTransition() {
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interactionController?.completionSpeed = 0.999
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interactionController?.cancel()
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interactionController = nil
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}
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public func finishInteractiveTransition() {
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interactionController?.finish()
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interactionController = nil
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}
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}
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// MARK: UIViewControllerAnimatedTransitioning
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extension CustomTransition: UIViewControllerAnimatedTransitioning {
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open func transitionDuration(using _: (any UIViewControllerContextTransitioning)?) -> TimeInterval {
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animationDuration
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}
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open func animateTransition(using transitionContext: any UIViewControllerContextTransitioning) {
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self.transitionContext = transitionContext
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fromViewController = transitionContext.viewController(forKey: .from)
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toViewController = transitionContext.viewController(forKey: .to)
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isInteractive = transitionContext.isInteractive
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transitionContainerView = transitionContext.containerView
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prepareTransitionParameters()
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prepareForTransition(interactive: isInteractive)
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if isPresenting {
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performTransition()
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} else {
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performDismissTransition()
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}
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}
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}
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// MARK: UIViewControllerTransitioningDelegate
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extension CustomTransition: UIViewControllerTransitioningDelegate {
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public func animationController(
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forPresented presented: UIViewController,
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presenting: UIViewController,
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source _: UIViewController
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) -> (any UIViewControllerAnimatedTransitioning)? {
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presentingViewController = presenting
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presentedViewController = presented
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isPresenting = true
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return self
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}
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public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
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presentingViewController = dismissed
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presentedViewController = dismissed.presentingViewController
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isPresenting = false
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return self
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}
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}

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