Add back (pop) custom animation

custom-transitions.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -102,6 +102,7 @@
 				BC78E7A026163BB500371773 /* Products */,
 			);
 			sourceTree = "<group>";
+			usesTabs = 0;
 		};
 		BC78E7A026163BB500371773 /* Products */ = {
 			isa = PBXGroup;
@@ -241,8 +242,9 @@
 		BC78E79726163BB500371773 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 1230;
-				LastUpgradeCheck = 1230;
+				LastUpgradeCheck = 1540;
 				TargetAttributes = {
 					BC78E79E26163BB500371773 = {
 						CreatedOnToolsVersion = 12.3;
@@ -370,6 +372,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -431,6 +434,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;

custom-transitions/Transitions/TransitionManager.swift

@@ -17,7 +17,7 @@ final class TransitionManager: NSObject, UIViewControllerAnimatedTransitioning {
     }
 
     func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
-        return duration
+        duration
     }
 
     func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
@@ -36,14 +36,14 @@ final class TransitionManager: NSObject, UIViewControllerAnimatedTransitioning {
 // MARK: - UINavigationControllerDelegate
 
 extension TransitionManager: UINavigationControllerDelegate {
-    func navigationController(
-        _ navigationController: UINavigationController, animationControllerFor operation: UINavigationController.Operation,
-        from fromVC: UIViewController,
-        to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
+    func navigationController(_ navigationController: UINavigationController,
+                              animationControllerFor operation: UINavigationController.Operation,
+                              from fromVC: UIViewController,
+                              to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
 
         self.operation = operation
 
-        if operation == .push {
+        if operation == .push || operation == .pop {
             return self
         }
 
@@ -71,7 +71,7 @@ private extension TransitionManager {
                 let albumsViewController = toViewController as? AlbumsViewController
             else { return }
 
-            dismissViewController(detailsViewController, to: albumsViewController)
+            dismissViewController(detailsViewController, to: albumsViewController, with: context)
 
         default:
             break
@@ -84,7 +84,7 @@ private extension TransitionManager {
             let albumCell = fromViewController.currentCell,
             let albumCoverImageView = fromViewController.currentCell?.albumCoverImageView,
             let albumDetailHeaderView = toViewController.headerView
-        else { return}
+        else { return }
 
         toViewController.view.layoutIfNeeded()
 
@@ -125,7 +125,47 @@ private extension TransitionManager {
         animator.startAnimation()
     }
 
-    func dismissViewController(_ fromViewController: AlbumDetailViewController, to toViewController: AlbumsViewController) {
+    func dismissViewController(_ fromViewController: AlbumDetailViewController, to toViewController: AlbumsViewController, with context: UIViewControllerContextTransitioning) {
+        guard
+            let albumCell = toViewController.currentCell,
+            let albumCoverImageView = toViewController.currentCell?.albumCoverImageView,
+            let albumDetailHeaderView = fromViewController.headerView,
+            let albumDetailRootView = fromViewController.view
+        else { return }
+
+        toViewController.view.layoutIfNeeded()
 
+        let containerView = context.containerView
+
+        let snapshotContentView = UIView()
+        snapshotContentView.backgroundColor = albumDetailRootView.backgroundColor
+        snapshotContentView.frame = albumDetailRootView.frame
+        snapshotContentView.layer.cornerRadius = albumCell.contentView.layer.cornerRadius
+
+        let snapshotAlbumCoverImageView = UIImageView()
+        snapshotAlbumCoverImageView.clipsToBounds = true
+        snapshotAlbumCoverImageView.contentMode = albumDetailHeaderView.contentMode
+        snapshotAlbumCoverImageView.image = albumDetailHeaderView.albumCoverImageView.image
+        snapshotAlbumCoverImageView.layer.cornerRadius = albumDetailHeaderView.layer.cornerRadius
+        snapshotAlbumCoverImageView.frame = containerView.convert(albumDetailHeaderView.albumCoverImageView.frame, from: albumDetailHeaderView)
+
+        containerView.addSubview(toViewController.view)
+        containerView.addSubview(snapshotContentView)
+        containerView.addSubview(snapshotAlbumCoverImageView)
+
+        let animator = UIViewPropertyAnimator(duration: duration, curve: .easeInOut) {
+            snapshotContentView.frame = containerView.convert(albumCell.contentView.frame, from: albumCell)
+            snapshotContentView.backgroundColor = albumCell.contentView.backgroundColor
+            snapshotAlbumCoverImageView.frame = containerView.convert(albumCoverImageView.frame, from: albumCell)
+            snapshotAlbumCoverImageView.layer.cornerRadius = albumCoverImageView.layer.cornerRadius
+        }
+
+        animator.addCompletion { position in
+            snapshotAlbumCoverImageView.removeFromSuperview()
+            snapshotContentView.removeFromSuperview()
+            context.completeTransition(position == .end)
+        }
+
+        animator.startAnimation()
     }
 }

custom-transitions/View/AlbumDetailHeaderView.swift

@@ -7,7 +7,7 @@
 
 import UIKit
 
-protocol AlbumDetailHeaderViewDelegate: class {
+protocol AlbumDetailHeaderViewDelegate: AnyObject {
     func closeButtonDidTap()
 }
 

custom-transitions/ViewController/AlbumsViewController.swift

@@ -43,9 +43,8 @@ class AlbumsViewController: UIViewController {
     }
 
     override func viewDidAppear(_ animated: Bool) {
-
+        super.viewDidAppear(animated)
     }
-
 }
 
 // MARK: - Setups