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13 changes: 9 additions & 4 deletions Sources/NavigationTransitions/NavigationTransitionDelegate.swift
Original file line number Diff line number Diff line change
Expand Up @@ -7,22 +7,27 @@ final class NavigationTransitionDelegate: NSObject, UINavigationControllerDelega
var transition: AnyNavigationTransition
private weak var baseDelegate: UINavigationControllerDelegate?
var interactionController: UIPercentDrivenInteractiveTransition?
private var initialAreAnimationsEnabled = UIView.areAnimationsEnabled
private var initialAreAnimationsEnabled: Bool?

init(transition: AnyNavigationTransition, baseDelegate: UINavigationControllerDelegate?) {
self.transition = transition
self.baseDelegate = baseDelegate
}

func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
initialAreAnimationsEnabled = UIView.areAnimationsEnabled
UIView.setAnimationsEnabled(transition.animation != nil)
if navigationController.transitionCoordinator != nil {
self.initialAreAnimationsEnabled = UIView.areAnimationsEnabled
UIView.setAnimationsEnabled(transition.animation != nil)
}
baseDelegate?.navigationController?(navigationController, willShow: viewController, animated: animated)
}

func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
baseDelegate?.navigationController?(navigationController, didShow: viewController, animated: animated)
UIView.setAnimationsEnabled(initialAreAnimationsEnabled)
if let initialAreAnimationsEnabled {
UIView.setAnimationsEnabled(initialAreAnimationsEnabled)
self.initialAreAnimationsEnabled = nil
}
}

func navigationController(_ navigationController: UINavigationController, interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
Expand Down