forked from shadowfacts/Tusker
Add interacting pushing to navigation controllers
Allows people to move forward in the navigation stack after popping (making popping a non-destructive action).
This commit is contained in:
parent
8be7480755
commit
65d57df949
GPG Key ID:
94A5AB95422746E5
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@ -157,6 +157,8 @@
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D67C57B221E28FAD00C3118B /* ComposeStatusReplyView.xib in Resources */ = {isa = PBXBuildFile; fileRef = D67C57B121E28FAD00C3118B /* ComposeStatusReplyView.xib */; };
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D67C57B421E2910700C3118B /* ComposeStatusReplyView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D67C57B321E2910700C3118B /* ComposeStatusReplyView.swift */; };
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D68FEC4F232C5BC300C84F23 /* SegmentedPageViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */; };
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D693DE5723FE1A6A0061E07D /* EnhancedNavigationViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D693DE5623FE1A6A0061E07D /* EnhancedNavigationViewController.swift */; };
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D693DE5923FE24310061E07D /* InteractivePushTransition.swift in Sources */ = {isa = PBXBuildFile; fileRef = D693DE5823FE24300061E07D /* InteractivePushTransition.swift */; };
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D6945C2F23AC47C3005C403C /* SavedDataManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C2E23AC47C3005C403C /* SavedDataManager.swift */; };
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D6945C3223AC4D36005C403C /* HashtagTimelineViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */; };
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D6945C3423AC6431005C403C /* AddSavedHashtagViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */; };
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@ -432,6 +434,8 @@
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D67C57B121E28FAD00C3118B /* ComposeStatusReplyView.xib */ = {isa = PBXFileReference; lastKnownFileType = file.xib; path = ComposeStatusReplyView.xib; sourceTree = "<group>"; };
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D67C57B321E2910700C3118B /* ComposeStatusReplyView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComposeStatusReplyView.swift; sourceTree = "<group>"; };
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D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SegmentedPageViewController.swift; sourceTree = "<group>"; };
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D693DE5623FE1A6A0061E07D /* EnhancedNavigationViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EnhancedNavigationViewController.swift; sourceTree = "<group>"; };
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D693DE5823FE24300061E07D /* InteractivePushTransition.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InteractivePushTransition.swift; sourceTree = "<group>"; };
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D6945C2E23AC47C3005C403C /* SavedDataManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SavedDataManager.swift; sourceTree = "<group>"; };
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D6945C3123AC4D36005C403C /* HashtagTimelineViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HashtagTimelineViewController.swift; sourceTree = "<group>"; };
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D6945C3323AC6431005C403C /* AddSavedHashtagViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddSavedHashtagViewController.swift; sourceTree = "<group>"; };
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@ -1136,6 +1140,8 @@
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D6B8DB332182A59300424AF7 /* UIAlertController+Visibility.swift */,
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D6BC8747219738E1006163F1 /* EnhancedTableViewController.swift */,
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D68FEC4E232C5BC300C84F23 /* SegmentedPageViewController.swift */,
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D693DE5623FE1A6A0061E07D /* EnhancedNavigationViewController.swift */,
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D693DE5823FE24300061E07D /* InteractivePushTransition.swift */,
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);
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path = Utilities;
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sourceTree = "<group>";
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@ -1584,6 +1590,7 @@
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D6BC9DB3232D4C07002CA326 /* WellnessPrefsView.swift in Sources */,
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0454DDAF22B462EF00B8BB8E /* GalleryExpandAnimationController.swift in Sources */,
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D64BC18F23C18B9D000D0238 /* FollowRequestNotificationTableViewCell.swift in Sources */,
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D693DE5923FE24310061E07D /* InteractivePushTransition.swift in Sources */,
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D6A3BC8A2321F79B00FD64D5 /* AccountTableViewCell.swift in Sources */,
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D66A77BB233838DC0058F1EC /* UIFont+Traits.swift in Sources */,
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D68FEC4F232C5BC300C84F23 /* SegmentedPageViewController.swift in Sources */,
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@ -1698,6 +1705,7 @@
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D667E5E721349D4C0057A976 /* ProfileTableViewController.swift in Sources */,
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D6D4DDD0212518A000E1C4BB /* AppDelegate.swift in Sources */,
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D6B053A423BD2C8100A066FA /* AssetCollectionsListViewController.swift in Sources */,
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D693DE5723FE1A6A0061E07D /* EnhancedNavigationViewController.swift in Sources */,
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D6163F2C21AA0AF1008DAC41 /* MyProfileTableViewController.swift in Sources */,
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);
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runOnlyForDeploymentPostprocessing = 0;
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@ -48,7 +48,7 @@ class MainTabBarViewController: UITabBarController, UITabBarControllerDelegate {
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if let vc = vc as? UINavigationController {
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return vc
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} else {
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return UINavigationController(rootViewController: vc)
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return EnhancedNavigationViewController(rootViewController: vc)
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}
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}
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@ -0,0 +1,76 @@
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//
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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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@ -0,0 +1,139 @@
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//
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// InteractivePushTransition.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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/// Allows interactively moving forward through the navigation stack after popping
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/// Based on https://github.com/NSExceptional/TBInteractivePushTransition
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class InteractivePushTransition: UIPercentDrivenInteractiveTransition {
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fileprivate let minimumPushVelocityThreshold: CGFloat = 700
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fileprivate let minimumPushDistanceThreshold: CGFloat = 0.5
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fileprivate let pushAnimationDuration: TimeInterval = 0.35
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private(set) weak var navigationController: EnhancedNavigationViewController!
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private(set) weak var interactivePushGestureRecognizer: UIScreenEdgePanGestureRecognizer!
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private(set) var interactive = false
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private(set) weak var pushingViewController: UIViewController?
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init(navigationController: EnhancedNavigationViewController) {
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super.init()
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self.navigationController = navigationController
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let interactivePushGestureRecognizer = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handleSwipeForward(_:)))
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self.interactivePushGestureRecognizer = interactivePushGestureRecognizer
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navigationController.delegate = self
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interactivePushGestureRecognizer.edges = .right
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interactivePushGestureRecognizer.require(toFail: navigationController.interactivePopGestureRecognizer!)
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navigationController.view.addGestureRecognizer(interactivePushGestureRecognizer)
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}
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@objc func handleSwipeForward(_ recognizer: UIPanGestureRecognizer) {
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interactive = true
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let velocity = recognizer.velocity(in: recognizer.view)
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let translation = recognizer.translation(in: recognizer.view)
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let dx = -translation.x / navigationController.view.bounds.width
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let vx = -velocity.x
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switch recognizer.state {
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case .began:
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if let viewController = navigationController.poppedViewControllers.first {
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pushingViewController = viewController
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navigationController.poppedViewControllers.removeFirst()
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navigationController.skipResetPoppedOnNextPush = true
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navigationController.pushViewController(viewController, animated: true)
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} else {
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interactive = false
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}
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case .changed:
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update(dx)
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case .ended:
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if (dx > minimumPushDistanceThreshold || vx > minimumPushVelocityThreshold) {
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finish()
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} else {
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cancel()
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}
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interactive = false
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default:
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cancel()
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interactive = false
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}
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}
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}
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extension InteractivePushTransition: UINavigationControllerDelegate {
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func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
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self.navigationController.onWillShow()
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}
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func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationController.Operation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
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if operation == .push, interactive {
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return self
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}
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return nil
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}
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func navigationController(_ navigationController: UINavigationController, interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
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if interactive {
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return self
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}
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return nil
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}
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}
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extension InteractivePushTransition: UIViewControllerAnimatedTransitioning {
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func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
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return pushAnimationDuration
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}
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func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
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let toView = transitionContext.view(forKey: .to)!
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let fromView = transitionContext.view(forKey: .from)!
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let dimmingView = UIView()
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dimmingView.backgroundColor = .black
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dimmingView.alpha = 0
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dimmingView.frame = fromView.frame
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transitionContext.containerView.addSubview(dimmingView)
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transitionContext.containerView.addSubview(toView)
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// modify frame of presented view to go from x = <screen width> to x = 0
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var frame = fromView.frame
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frame.origin.x = frame.width
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toView.frame = frame
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frame.origin.x = 0
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// we want it linear while interactive, but we want the "ease out" animation
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// if the user flicks the screen ahrd enough to finish the transition without interaction
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let options = interactive ? UIView.AnimationOptions.curveLinear : .curveEaseOut
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let duration = transitionDuration(using: transitionContext)
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UIView.animate(withDuration: duration, delay: 0, options: options, animations: {
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// these magic numbers scientifically determined by repeatedly adjusting and comparing to the system animation
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let translationDistance = -frame.size.width * 0.3
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fromView.transform = CGAffineTransform(translationX: translationDistance, y: 0)
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toView.frame = frame
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dimmingView.alpha = 0.075
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}) { (finished) in
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fromView.transform = .identity
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dimmingView.removeFromSuperview()
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transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
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}
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}
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}
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