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FormsTransitions.md

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FormsTransitions

FormsTransitions helper

Import

import FormsTransitions

Dependencies

FormsUtils.framework

Usage

View Interpolation

All views has additional viewKey, viewOptions and viewContentMode properties. View can be interpolated between screens.

view.viewKey = "contentView"
view.viewOptions = []
view.viewContentMode = .scaleToFill

View options

enum TransitionOption {
    case leaveRootInSource
    case leaveRootInDestination
    case leaveRoot
    case skipInSource
    case skipInDestination
    case skip
    case moveSource
    case moveDestination
    case forceMatch
}

ViewController

Presented controller must have custom presentation style and set transitioning delegate

controller.modalPresentationStyle = .custom
controller.transitioningDelegate = coordinator

If presented controller conform TransitionableController protocol, views between presenting and presented controllers would be interpolated.

Animators

TransitionControllerSlideHorizontalAnimator
TransitionControllerSlideVerticalAnimator

Handle swipe to back interactively

...
self.edgePanGesture.addTarget(self, action: #selector(handleTransitionBackSwipe))
self.edgePanGesture.edges = .left
self.view.addGestureRecognizer(self.edgePanGesture)
...
    
@objc
func handleTransitionBackSwipe(recognizer: UIScreenEdgePanGestureRecognizer) {
    self.handleTransitionControllerEdgePan(recognizer)
}

NavigationController

Navigation controller must have custom delegate

controller.delegate = coordinator

If navigation controller conform TransitionableNavigation protocol, views between controllers would be interpolated.

Animators

TransitionNavigationSlideHorizontalAnimator
TransitionNavigationSlideVerticalAnimator
TransitionNavigationFadeAnimator

Handle swipe to back interactively

...
self.edgePanGesture.addTarget(self, action: #selector(handleTransitionBackSwipe))
self.edgePanGesture.edges = .left
self.view.addGestureRecognizer(self.edgePanGesture)
...
    
@objc
func handleTransitionBackSwipe(recognizer: UIScreenEdgePanGestureRecognizer) {
    self.handleTransitionNavigationEdgePan(recognizer)
}