77 lines
2.8 KiB
Swift
77 lines
2.8 KiB
Swift
//
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// EnhancedNavigationViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 2/19/20.
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// Copyright © 2020 Shadowfacts. All rights reserved.
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//
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import UIKit
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class EnhancedNavigationViewController: UINavigationController {
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var poppedViewControllers = [UIViewController]()
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var skipResetPoppedOnNextPush = false
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private var interactivePushTransition: InteractivePushTransition!
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override func viewDidLoad() {
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super.viewDidLoad()
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self.interactivePushTransition = InteractivePushTransition(navigationController: self)
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}
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override func popViewController(animated: Bool) -> UIViewController? {
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if let popped = super.popViewController(animated: animated) {
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poppedViewControllers.insert(popped, at: 0)
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return popped
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} else {
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return nil
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}
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}
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override func popToRootViewController(animated: Bool) -> [UIViewController]? {
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if let popped = super.popToRootViewController(animated: animated) {
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poppedViewControllers = popped
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return popped
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} else {
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return nil
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}
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}
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override func popToViewController(_ viewController: UIViewController, animated: Bool) -> [UIViewController]? {
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if let popped = super.popToViewController(viewController, animated: animated) {
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poppedViewControllers.insert(contentsOf: popped, at: 0)
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return popped
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} else {
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return nil
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}
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}
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override func pushViewController(_ viewController: UIViewController, animated: Bool) {
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if skipResetPoppedOnNextPush {
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skipResetPoppedOnNextPush = false
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} else {
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self.poppedViewControllers = []
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}
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super.pushViewController(viewController, animated: animated)
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}
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func onWillShow() {
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self.transitionCoordinator?.notifyWhenInteractionChanges({ (context) in
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if context.isCancelled {
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if self.interactivePushTransition.interactive {
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// when an interactive push gesture is cancelled, make sure to adding the VC that was being pushed back onto the popped stack so it doesn't disappear
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self.poppedViewControllers.insert(self.interactivePushTransition.pushingViewController!, at: 0)
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} else {
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// when an interactive pop gesture is cancelled (i.e. the user lifts their finger before it triggers),
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// the popViewController(animated:) method has already been called so the VC has already been added to the popped stack
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// so we make sure to remove it, otherwise there could be duplicate VCs on the navigation stasck
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self.poppedViewControllers.remove(at: 0)
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}
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}
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})
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}
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}
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