├── InteractiveCustomTransitionsDemo.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   └── contents.xcworkspacedata
    └── xcuserdata
    │   └── rryan.xcuserdatad
    │       └── xcschemes
    │           ├── InteractiveCustomTransitionsDemo.xcscheme
    │           └── xcschememanagement.plist
├── InteractiveCustomTransitionsDemo
    ├── AViewController.swift
    ├── AppDelegate.swift
    ├── BViewController.swift
    ├── Base.lproj
    │   ├── LaunchScreen.xib
    │   └── Main.storyboard
    ├── CViewController.swift
    ├── CustomNavigationController.swift
    ├── Images.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Info.plist
    └── RootViewController.swift
└── README.md


/InteractiveCustomTransitionsDemo.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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 89 |       </AdditionalOptions>
 90 |    </LaunchAction>
 91 |    <ProfileAction
 92 |       buildConfiguration = "Release"
 93 |       shouldUseLaunchSchemeArgsEnv = "YES"
 94 |       savedToolIdentifier = ""
 95 |       useCustomWorkingDirectory = "NO"
 96 |       debugDocumentVersioning = "YES">
 97 |       <BuildableProductRunnable
 98 |          runnableDebuggingMode = "0">
 99 |          <BuildableReference
100 |             BuildableIdentifier = "primary"
101 |             BlueprintIdentifier = "83395CBF1A047A0E00BEA60F"
102 |             BuildableName = "InteractiveCustomTransitionsDemo.app"
103 |             BlueprintName = "InteractiveCustomTransitionsDemo"
104 |             ReferencedContainer = "container:InteractiveCustomTransitionsDemo.xcodeproj">
105 |          </BuildableReference>
106 |       </BuildableProductRunnable>
107 |    </ProfileAction>
108 |    <AnalyzeAction
109 |       buildConfiguration = "Debug">
110 |    </AnalyzeAction>
111 |    <ArchiveAction
112 |       buildConfiguration = "Release"
113 |       revealArchiveInOrganizer = "YES">
114 |    </ArchiveAction>
115 | </Scheme>
116 | 


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/InteractiveCustomTransitionsDemo.xcodeproj/xcuserdata/rryan.xcuserdatad/xcschemes/xcschememanagement.plist:
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 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>InteractiveCustomTransitionsDemo.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | 	<key>SuppressBuildableAutocreation</key>
14 | 	<dict>
15 | 		<key>83395CBF1A047A0E00BEA60F</key>
16 | 		<dict>
17 | 			<key>primary</key>
18 | 			<true/>
19 | 		</dict>
20 | 		<key>83395CD41A047A0E00BEA60F</key>
21 | 		<dict>
22 | 			<key>primary</key>
23 | 			<true/>
24 | 		</dict>
25 | 	</dict>
26 | </dict>
27 | </plist>
28 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/AViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AViewController.swift
 3 | //  InteractiveCustomTransitionsDemo
 4 | //
 5 | //  Created by Robert Ryan on 10/31/14.
 6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
 7 | //
 8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
 9 | //  http://creativecommons.org/licenses/by-sa/4.0/
10 | 
11 | import UIKit
12 | 
13 | // If you want to allow navigation controller to automatically detect whether you can swipe right to left
14 | // to push to the "next" scene, you should conform to `CustomNavigationControllerDelegate` and then
15 | // implement `pushToNextScene`.
16 | 
17 | class AViewController: UIViewController, CustomNavigationControllerDelegate {
18 | 
19 |     func pushToNextScene() {
20 |         performSegue(withIdentifier: "PushToB", sender: self)
21 |     }
22 | 
23 |     @IBAction func pressedCancelButton(_ sender: AnyObject) {
24 |         navigationController?.dismiss(animated: true)
25 |     }
26 |     
27 | }
28 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  InteractiveCustomTransitionsDemo
 4 | //
 5 | //  Created by Robert Ryan on 10/31/14.
 6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
 7 | //
 8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
 9 | //  http://creativecommons.org/licenses/by-sa/4.0/
10 | 
11 | import UIKit
12 | 
13 | @UIApplicationMain
14 | class AppDelegate: UIResponder, UIApplicationDelegate {
15 | 
16 |     var window: UIWindow?
17 | 
18 | 
19 |     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
20 |         // Override point for customization after application launch.
21 |         return true
22 |     }
23 | 
24 |     func applicationWillResignActive(_ application: UIApplication) {
25 |         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
26 |         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
27 |     }
28 | 
29 |     func applicationDidEnterBackground(_ application: UIApplication) {
30 |         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
31 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
32 |     }
33 | 
34 |     func applicationWillEnterForeground(_ application: UIApplication) {
35 |         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
36 |     }
37 | 
38 |     func applicationDidBecomeActive(_ application: UIApplication) {
39 |         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
40 |     }
41 | 
42 |     func applicationWillTerminate(_ application: UIApplication) {
43 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
44 |     }
45 | 
46 | 
47 | }
48 | 
49 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/BViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  BViewController.swift
 3 | //  InteractiveCustomTransitionsDemo
 4 | //
 5 | //  Created by Robert Ryan on 10/31/14.
 6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
 7 | //
 8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
 9 | //  http://creativecommons.org/licenses/by-sa/4.0/
10 | 
11 | import UIKit
12 | 
13 | // If you want to allow navigation controller to automatically detect whether you can swipe right to left
14 | // to push to the "next" scene, you should conform to `CustomNavigationControllerDelegate` and then
15 | // implement `pushToNextScene`.
16 | 
17 | class BViewController: UIViewController, CustomNavigationControllerDelegate {
18 | 
19 |     func pushToNextScene() {
20 |         performSegue(withIdentifier: "PushToC", sender: self)
21 |     }
22 | 
23 | }
24 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/Base.lproj/LaunchScreen.xib:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6214" systemVersion="14A314h" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6207"/>
 5 |         <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
 6 |     </dependencies>
 7 |     <objects>
 8 |         <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
 9 |         <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
10 |         <view contentMode="scaleToFill" id="iN0-l3-epB">
11 |             <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
12 |             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
13 |             <subviews>
14 |                 <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2014 Robert Ryan. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
15 |                     <rect key="frame" x="20" y="439" width="441" height="21"/>
16 |                     <fontDescription key="fontDescription" type="system" pointSize="17"/>
17 |                     <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
18 |                     <nil key="highlightedColor"/>
19 |                 </label>
20 |                 <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="InteractiveCustomTransitionsDemo" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
21 |                     <rect key="frame" x="20" y="140" width="441" height="43"/>
22 |                     <fontDescription key="fontDescription" type="boldSystem" pointSize="36"/>
23 |                     <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
24 |                     <nil key="highlightedColor"/>
25 |                 </label>
26 |             </subviews>
27 |             <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
28 |             <constraints>
29 |                 <constraint firstItem="kId-c2-rCX" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="bottom" multiplier="1/3" constant="1" id="5cJ-9S-tgC"/>
30 |                 <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
31 |                 <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
32 |                 <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
33 |                 <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
34 |                 <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
35 |             </constraints>
36 |             <nil key="simulatedStatusBarMetrics"/>
37 |             <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
38 |             <point key="canvasLocation" x="548" y="455"/>
39 |         </view>
40 |     </objects>
41 | </document>
42 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="UTF-8"?>
  2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12118" systemVersion="16E195" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="vXZ-lx-hvc">
  3 |     <device id="retina4_7" orientation="portrait">
  4 |         <adaptation id="fullscreen"/>
  5 |     </device>
  6 |     <dependencies>
  7 |         <deployment identifier="iOS"/>
  8 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12086"/>
  9 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 10 |     </dependencies>
 11 |     <scenes>
 12 |         <!--Root View Controller-->
 13 |         <scene sceneID="ufC-wZ-h7g">
 14 |             <objects>
 15 |                 <viewController id="vXZ-lx-hvc" customClass="RootViewController" customModule="InteractiveCustomTransitionsDemo" customModuleProvider="target" sceneMemberID="viewController">
 16 |                     <layoutGuides>
 17 |                         <viewControllerLayoutGuide type="top" id="jyV-Pf-zRb"/>
 18 |                         <viewControllerLayoutGuide type="bottom" id="2fi-mo-0CV"/>
 19 |                     </layoutGuides>
 20 |                     <view key="view" contentMode="scaleToFill" id="kh9-bI-dsS">
 21 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
 22 |                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
 23 |                         <subviews>
 24 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="cEZ-nZ-Rx2">
 25 |                                 <rect key="frame" x="302" y="28" width="57" height="30"/>
 26 |                                 <state key="normal" title="Proceed">
 27 |                                     <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 28 |                                     <color key="titleShadowColor" red="0.5" green="0.5" blue="0.5" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 29 |                                 </state>
 30 |                                 <connections>
 31 |                                     <segue destination="QXa-IR-oe9" kind="presentation" id="mCW-Fb-BvZ"/>
 32 |                                 </connections>
 33 |                             </button>
 34 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="I2D-t1-UHx">
 35 |                                 <rect key="frame" x="16" y="28" width="343" height="619"/>
 36 |                                 <string key="text">This is root scene.

By design, the only way to proceed to the next scene (i.e. presenting a view controller whose first scene is scene A) is by pressing the "Proceed" button, above.

Throughout this demo, I'll use a fade transition to illustrate that we are, indeed, doing a custom transition.</string>
 37 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 38 |                                 <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 39 |                                 <nil key="highlightedColor"/>
 40 |                             </label>
 41 |                         </subviews>
 42 |                         <color key="backgroundColor" red="0.25098040699958801" green="0.50196081399917603" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 43 |                         <constraints>
 44 |                             <constraint firstAttribute="trailing" secondItem="cEZ-nZ-Rx2" secondAttribute="trailing" constant="16" id="926-dg-skW"/>
 45 |                             <constraint firstAttribute="trailing" secondItem="I2D-t1-UHx" secondAttribute="trailing" constant="16" id="TNF-C4-TbL"/>
 46 |                             <constraint firstItem="I2D-t1-UHx" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="16" id="b4g-Ad-o1l"/>
 47 |                             <constraint firstItem="I2D-t1-UHx" firstAttribute="top" secondItem="jyV-Pf-zRb" secondAttribute="bottom" constant="8" id="ckL-aJ-Leu"/>
 48 |                             <constraint firstItem="2fi-mo-0CV" firstAttribute="top" secondItem="I2D-t1-UHx" secondAttribute="bottom" constant="20" id="odG-zx-D2V"/>
 49 |                             <constraint firstItem="cEZ-nZ-Rx2" firstAttribute="top" secondItem="jyV-Pf-zRb" secondAttribute="bottom" constant="8" id="xgL-Wy-9qB"/>
 50 |                         </constraints>
 51 |                     </view>
 52 |                 </viewController>
 53 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="x5A-6p-PRh" sceneMemberID="firstResponder"/>
 54 |             </objects>
 55 |             <point key="canvasLocation" x="-609" y="539"/>
 56 |         </scene>
 57 |         <!--A-->
 58 |         <scene sceneID="kNU-mf-Ff3">
 59 |             <objects>
 60 |                 <viewController id="Qhh-V7-dvQ" customClass="AViewController" customModule="InteractiveCustomTransitionsDemo" customModuleProvider="target" sceneMemberID="viewController">
 61 |                     <layoutGuides>
 62 |                         <viewControllerLayoutGuide type="top" id="VYx-qw-wEJ"/>
 63 |                         <viewControllerLayoutGuide type="bottom" id="kPx-FW-mmT"/>
 64 |                     </layoutGuides>
 65 |                     <view key="view" contentMode="scaleToFill" id="8Qw-bP-ivF">
 66 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
 67 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
 68 |                         <subviews>
 69 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="gnk-My-fnt">
 70 |                                 <rect key="frame" x="16" y="72" width="343" height="575"/>
 71 |                                 <string key="text">This is scene A within navigation controller.

From here you can either click "cancel" to dismiss this scene's navigation controller (i.e. return the the root), or you can click on the B button to push to scene B. You can also swipe left to right to dismiss navigation controller. You can also swipe right to left to push to B.</string>
 72 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 73 |                                 <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 74 |                                 <nil key="highlightedColor"/>
 75 |                             </label>
 76 |                         </subviews>
 77 |                         <color key="backgroundColor" red="0.50196081399917603" green="0.50196081399917603" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
 78 |                         <constraints>
 79 |                             <constraint firstAttribute="trailing" secondItem="gnk-My-fnt" secondAttribute="trailing" constant="16" id="Yn8-52-z7w"/>
 80 |                             <constraint firstItem="gnk-My-fnt" firstAttribute="top" secondItem="VYx-qw-wEJ" secondAttribute="bottom" constant="8" id="fpM-Qr-SwB"/>
 81 |                             <constraint firstItem="gnk-My-fnt" firstAttribute="leading" secondItem="8Qw-bP-ivF" secondAttribute="leading" constant="16" id="iFp-q9-XPE"/>
 82 |                             <constraint firstItem="kPx-FW-mmT" firstAttribute="top" secondItem="gnk-My-fnt" secondAttribute="bottom" constant="20" id="lEF-4L-z6C"/>
 83 |                         </constraints>
 84 |                     </view>
 85 |                     <navigationItem key="navigationItem" title="A" id="wAN-V4-5Yd">
 86 |                         <barButtonItem key="leftBarButtonItem" title="Cancel" id="2xL-bH-dYH">
 87 |                             <connections>
 88 |                                 <action selector="pressedCancelButton:" destination="Qhh-V7-dvQ" id="sId-Lw-NRU"/>
 89 |                             </connections>
 90 |                         </barButtonItem>
 91 |                         <barButtonItem key="rightBarButtonItem" title="B" id="3IF-Pg-X8h">
 92 |                             <connections>
 93 |                                 <segue destination="oLO-iU-e2a" kind="show" identifier="PushToB" id="R9t-Le-irp"/>
 94 |                             </connections>
 95 |                         </barButtonItem>
 96 |                     </navigationItem>
 97 |                 </viewController>
 98 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="Ocd-FH-k0P" userLabel="First Responder" sceneMemberID="firstResponder"/>
 99 |             </objects>
100 |             <point key="canvasLocation" x="884" y="539"/>
101 |         </scene>
102 |         <!--B-->
103 |         <scene sceneID="gTr-ne-pEy">
104 |             <objects>
105 |                 <viewController id="oLO-iU-e2a" customClass="BViewController" customModule="InteractiveCustomTransitionsDemo" customModuleProvider="target" sceneMemberID="viewController">
106 |                     <layoutGuides>
107 |                         <viewControllerLayoutGuide type="top" id="Ezw-GS-S2O"/>
108 |                         <viewControllerLayoutGuide type="bottom" id="ylU-eW-cu3"/>
109 |                     </layoutGuides>
110 |                     <view key="view" contentMode="scaleToFill" id="aEI-nd-Tmi">
111 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
112 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
113 |                         <subviews>
114 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="GeB-dt-kQ2">
115 |                                 <rect key="frame" x="16" y="72" width="343" height="575"/>
116 |                                 <string key="text">This is scene B within navigation controller.

From here you can either click "back" button to pop to scene A, or press "C" button to push to "C". You can also swipe left to right to pop to "A". You can also swipe right to left to push to "C".</string>
117 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
118 |                                 <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
119 |                                 <nil key="highlightedColor"/>
120 |                             </label>
121 |                         </subviews>
122 |                         <color key="backgroundColor" red="0.50196081399917603" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
123 |                         <constraints>
124 |                             <constraint firstAttribute="trailing" secondItem="GeB-dt-kQ2" secondAttribute="trailing" constant="16" id="0gc-OR-hCy"/>
125 |                             <constraint firstItem="GeB-dt-kQ2" firstAttribute="top" secondItem="Ezw-GS-S2O" secondAttribute="bottom" constant="8" id="IuZ-o2-PGp"/>
126 |                             <constraint firstItem="GeB-dt-kQ2" firstAttribute="leading" secondItem="aEI-nd-Tmi" secondAttribute="leading" constant="16" id="d3G-bx-7F1"/>
127 |                             <constraint firstItem="ylU-eW-cu3" firstAttribute="top" secondItem="GeB-dt-kQ2" secondAttribute="bottom" constant="20" id="vnr-yh-kaO"/>
128 |                         </constraints>
129 |                     </view>
130 |                     <navigationItem key="navigationItem" title="B" id="2ww-GV-BQQ">
131 |                         <barButtonItem key="rightBarButtonItem" title="C" id="7Fr-u7-xfn">
132 |                             <connections>
133 |                                 <segue destination="2Ud-ef-PnJ" kind="show" identifier="PushToC" id="BCZ-FB-9WM"/>
134 |                             </connections>
135 |                         </barButtonItem>
136 |                     </navigationItem>
137 |                 </viewController>
138 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="nKk-oY-CDg" userLabel="First Responder" sceneMemberID="firstResponder"/>
139 |             </objects>
140 |             <point key="canvasLocation" x="1627" y="539"/>
141 |         </scene>
142 |         <!--C-->
143 |         <scene sceneID="8fu-q9-2WR">
144 |             <objects>
145 |                 <viewController id="2Ud-ef-PnJ" customClass="CViewController" customModule="InteractiveCustomTransitionsDemo" customModuleProvider="target" sceneMemberID="viewController">
146 |                     <layoutGuides>
147 |                         <viewControllerLayoutGuide type="top" id="c2Q-I7-6ha"/>
148 |                         <viewControllerLayoutGuide type="bottom" id="o4D-WU-UoK"/>
149 |                     </layoutGuides>
150 |                     <view key="view" contentMode="scaleToFill" id="WhD-0T-pgP">
151 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
152 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
153 |                         <subviews>
154 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="XIs-jq-HmR">
155 |                                 <rect key="frame" x="16" y="72" width="343" height="575"/>
156 |                                 <string key="text">This is scene C within navigation controller.

From here you can either press "back" button to pop back to scene B or swipe left to right.</string>
157 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
158 |                                 <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
159 |                                 <nil key="highlightedColor"/>
160 |                             </label>
161 |                         </subviews>
162 |                         <color key="backgroundColor" red="0.0" green="0.0" blue="0.50196081399917603" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
163 |                         <constraints>
164 |                             <constraint firstItem="XIs-jq-HmR" firstAttribute="top" secondItem="c2Q-I7-6ha" secondAttribute="bottom" constant="8" id="8Pk-m3-yhv"/>
165 |                             <constraint firstAttribute="trailing" secondItem="XIs-jq-HmR" secondAttribute="trailing" constant="16" id="FXF-1g-osN"/>
166 |                             <constraint firstItem="o4D-WU-UoK" firstAttribute="top" secondItem="XIs-jq-HmR" secondAttribute="bottom" constant="20" id="gM9-Bo-xQG"/>
167 |                             <constraint firstItem="XIs-jq-HmR" firstAttribute="leading" secondItem="WhD-0T-pgP" secondAttribute="leading" constant="16" id="oR9-dc-UWQ"/>
168 |                         </constraints>
169 |                     </view>
170 |                     <navigationItem key="navigationItem" title="C" id="1Ma-Rg-6zb"/>
171 |                 </viewController>
172 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="oFC-0z-AwN" userLabel="First Responder" sceneMemberID="firstResponder"/>
173 |             </objects>
174 |             <point key="canvasLocation" x="2383" y="539"/>
175 |         </scene>
176 |         <!--Custom Navigation Controller-->
177 |         <scene sceneID="SzN-ve-Juq">
178 |             <objects>
179 |                 <navigationController id="QXa-IR-oe9" customClass="CustomNavigationController" customModule="InteractiveCustomTransitionsDemo" customModuleProvider="target" sceneMemberID="viewController">
180 |                     <navigationBar key="navigationBar" contentMode="scaleToFill" id="IJD-S2-GFZ">
181 |                         <rect key="frame" x="0.0" y="0.0" width="320" height="44"/>
182 |                         <autoresizingMask key="autoresizingMask"/>
183 |                     </navigationBar>
184 |                     <connections>
185 |                         <segue destination="Qhh-V7-dvQ" kind="relationship" relationship="rootViewController" id="3tr-nG-ElS"/>
186 |                     </connections>
187 |                 </navigationController>
188 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="FzB-fO-X2d" userLabel="First Responder" sceneMemberID="firstResponder"/>
189 |             </objects>
190 |             <point key="canvasLocation" x="101" y="539"/>
191 |         </scene>
192 |     </scenes>
193 | </document>
194 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/CViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  CViewController.swift
 3 | //  InteractiveCustomTransitionsDemo
 4 | //
 5 | //  Created by Robert Ryan on 10/31/14.
 6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
 7 | //
 8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
 9 | //  http://creativecommons.org/licenses/by-sa/4.0/
10 | 
11 | import UIKit
12 | 
13 | // Note, since this is the last scene in the demo, we did not conform to
14 | // `CustomNavigationControllerDelegate`, nor did we implement `pushToNextScene`.
15 | 
16 | class CViewController: UIViewController {
17 | 
18 |     // this is intentionally blank
19 | 
20 | }
21 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/CustomNavigationController.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  CustomNavigationController.swift
  3 | //  deleteme10
  4 | //
  5 | //  Created by Robert Ryan on 10/31/14.
  6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
  7 | //
  8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
  9 | //  http://creativecommons.org/licenses/by-sa/4.0/
 10 | 
 11 | import UIKit
 12 | import UIKit.UIGestureRecognizerSubclass
 13 | 
 14 | /// Custom Navigation Controller Protocol
 15 | 
 16 | @objc protocol CustomNavigationControllerDelegate {
 17 |     
 18 |     /// Push to next scene
 19 |     ///
 20 |     /// If the view controller wants to enjoy swipe from right edge to push to the next scene,
 21 |     /// it has to implement `pushToNextScene` that initiates that segue (or programmatic 
 22 |     /// `show` or `push`).
 23 |     
 24 |     func pushToNextScene()
 25 | }
 26 | 
 27 | class CustomNavigationController: UINavigationController {
 28 |     
 29 |     // If you are not doing custom transition to the initial navigation controller, you can
 30 |     // comment out the following three routines, as well as the `UIViewControllerTransitioningDelegate`
 31 |     // extension and `UIPresentationController` subclass below.
 32 |     
 33 |     public required init?(coder aDecoder: NSCoder) {
 34 |         super.init(coder: aDecoder)
 35 |         configure()
 36 |     }
 37 |     
 38 |     override init(rootViewController: UIViewController) {
 39 |         super.init(rootViewController: rootViewController)
 40 |         configure()
 41 |     }
 42 |     
 43 |     private func configure() {
 44 |         transitioningDelegate = self   // for presenting the original navigation controller
 45 |     }
 46 |     
 47 |     override func viewDidLoad() {
 48 |         super.viewDidLoad()
 49 |         
 50 |         delegate = self                // for navigation controller custom transitions
 51 |         
 52 |         let left = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handleSwipeFromLeft(_:)))
 53 |         left.edges = .left
 54 |         view.addGestureRecognizer(left)
 55 |         
 56 |         let right = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handleSwipeFromRight(_:)))
 57 |         right.edges = .right
 58 |         view.addGestureRecognizer(right)
 59 |     }
 60 |     
 61 |     fileprivate var interactionController: UIPercentDrivenInteractiveTransition?
 62 |     
 63 |     func handleSwipeFromLeft(_ gesture: UIScreenEdgePanGestureRecognizer) {
 64 |         let percent = gesture.translation(in: gesture.view!).x / gesture.view!.bounds.size.width
 65 |         
 66 |         if gesture.state == .began {
 67 |             // if the navigation controller wasn't, itself, presented with a custom transition,
 68 |             // you insert this `guard` statement to prevent interactive dismissal performed below.
 69 |             //
 70 |             // guard viewControllers.count > 1 else {
 71 |             //     gesture.state = .cancelled
 72 |             //     return
 73 |             // }
 74 |             
 75 |             interactionController = UIPercentDrivenInteractiveTransition()
 76 |             if viewControllers.count > 1 {
 77 |                 popViewController(animated: true)
 78 |             } else {
 79 |                 dismiss(animated: true)
 80 |             }
 81 |         } else if gesture.state == .changed {
 82 |             interactionController?.update(percent)
 83 |         } else if gesture.state == .ended {
 84 |             if percent > 0.5 && gesture.state != .cancelled {
 85 |                 interactionController?.finish()
 86 |             } else {
 87 |                 interactionController?.cancel()
 88 |             }
 89 |             interactionController = nil
 90 |         }
 91 |     }
 92 |     
 93 |     func handleSwipeFromRight(_ gesture: UIScreenEdgePanGestureRecognizer) {
 94 |         let percent = -gesture.translation(in: gesture.view!).x / gesture.view!.bounds.size.width
 95 |         
 96 |         if gesture.state == .began {
 97 |             guard let currentViewController = viewControllers.last as? CustomNavigationControllerDelegate else {
 98 |                 gesture.state = .cancelled
 99 |                 return
100 |             }
101 |             interactionController = UIPercentDrivenInteractiveTransition()
102 |             currentViewController.pushToNextScene()
103 |         } else if gesture.state == .changed {
104 |             interactionController?.update(percent)
105 |         } else if gesture.state == .ended {
106 |             if percent > 0.5 {
107 |                 interactionController?.finish()
108 |             } else {
109 |                 interactionController?.cancel()
110 |             }
111 |             interactionController = nil
112 |         }
113 |     }
114 |     
115 | }
116 | 
117 | // MARK: - UINavigationControllerDelegate
118 | //
119 | // Use this for custom transitions as you push/pop between the various child view controllers 
120 | // of the navigation controller. If you don't need a custom animation there, you can comment this
121 | // out.
122 | 
123 | extension CustomNavigationController: UINavigationControllerDelegate {
124 |     
125 |     func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationControllerOperation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
126 |         
127 |         if operation == .push {
128 |             return ForwardAnimator()
129 |         } else if operation == .pop {
130 |             return BackAnimator()
131 |         }
132 |         return nil
133 |     }
134 |     
135 |     func navigationController(_ navigationController: UINavigationController, interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
136 |         return interactionController
137 |     }
138 |     
139 | }
140 | 
141 | // MARK: - UIViewControllerTransitioningDelegate
142 | //
143 | // This is needed for the animation when we initially present the navigation controller. 
144 | // If you're only looking for custom animations as you push/pop between the child view
145 | // controllers of the navigation controller, this is not needed. This is only for the 
146 | // custom transition of the initial `present` and `dismiss` of the navigation controller 
147 | // itself.
148 | 
149 | extension CustomNavigationController: UIViewControllerTransitioningDelegate {
150 | 
151 |     func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
152 |         return ForwardAnimator()
153 |     }
154 | 
155 |     func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
156 |         return BackAnimator()
157 |     }
158 | 
159 |     func interactionControllerForPresentation(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
160 |         return interactionController
161 |     }
162 | 
163 |     func interactionControllerForDismissal(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
164 |         return interactionController
165 |     }
166 | 
167 |     func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
168 |         return PresentationController(presentedViewController: presented, presenting: presenting)
169 |     }
170 | 
171 | }
172 | 
173 | class PresentationController: UIPresentationController {
174 |     override var shouldRemovePresentersView: Bool { return true }
175 | }
176 | 
177 | class ForwardAnimator : NSObject, UIViewControllerAnimatedTransitioning {
178 |     
179 |     func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
180 |         return 0.5
181 |     }
182 |     
183 |     func animateTransition(using context: UIViewControllerContextTransitioning) {
184 |         let toView = context.viewController(forKey: .to)!.view!
185 |         
186 |         context.containerView.addSubview(toView)
187 |         
188 |         toView.alpha = 0.0
189 |         
190 |         UIView.animate(withDuration: transitionDuration(using: context), animations: {
191 |             toView.alpha = 1.0
192 |         }, completion: { finished in
193 |             context.completeTransition(!context.transitionWasCancelled)
194 |         })
195 |     }
196 |     
197 | }
198 | 
199 | class BackAnimator : NSObject, UIViewControllerAnimatedTransitioning {
200 |     
201 |     func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
202 |         return 0.5
203 |     }
204 |     
205 |     func animateTransition(using context: UIViewControllerContextTransitioning) {
206 |         let toView   = context.viewController(forKey: .to)!.view!
207 |         let fromView = context.viewController(forKey: .from)!.view!
208 |         
209 |         context.containerView.insertSubview(toView, belowSubview: fromView)
210 |         
211 |         UIView.animate(withDuration: transitionDuration(using: context), animations: {
212 |             fromView.alpha = 0.0
213 |         }, completion: { finished in
214 |             context.completeTransition(!context.transitionWasCancelled)
215 |         })
216 |     }
217 | }
218 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/Images.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "29x29",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "29x29",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "40x40",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "40x40",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "60x60",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "60x60",
31 |       "scale" : "3x"
32 |     }
33 |   ],
34 |   "info" : {
35 |     "version" : 1,
36 |     "author" : "xcode"
37 |   }
38 | }


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>UILaunchStoryboardName</key>
26 | 	<string>LaunchScreen</string>
27 | 	<key>UIMainStoryboardFile</key>
28 | 	<string>Main</string>
29 | 	<key>UIRequiredDeviceCapabilities</key>
30 | 	<array>
31 | 		<string>armv7</string>
32 | 	</array>
33 | 	<key>UISupportedInterfaceOrientations</key>
34 | 	<array>
35 | 		<string>UIInterfaceOrientationPortrait</string>
36 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
37 | 		<string>UIInterfaceOrientationLandscapeRight</string>
38 | 	</array>
39 | </dict>
40 | </plist>
41 | 


--------------------------------------------------------------------------------
/InteractiveCustomTransitionsDemo/RootViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  RootViewController.swift
 3 | //  InteractiveCustomTransitionsDemo
 4 | //
 5 | //  Created by Robert Ryan on 10/31/14.
 6 | //  Copyright (c) 2014 Robert Ryan. All rights reserved.
 7 | //
 8 | //  This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
 9 | //  http://creativecommons.org/licenses/by-sa/4.0/
10 | 
11 | import UIKit
12 | 
13 | // This is the "root" scene's view controller. The presentation of the navigation controller
14 | // and it's children is done entirely in Interface Builder, though you obviously _could_
15 | // implement it programmatically if you wanted to.
16 | 
17 | class RootViewController: UIViewController {
18 | 
19 |     // this is intentionally blank
20 |     
21 | }
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | ## Interactive Custom Transitions Demo in Swift
 2 | 
 3 | This is an demonstration of a Custom Transitions and Interactive Custom Transitions.
 4 | 
 5 | The idea was to illustrate a custom "presentation" transition between the scenes in a navigation controller. The goal was to allow interactive gestures to swipe between three different scenes, A, B, and C underneath the navigation controller to illustrate custom "push" and "pop" transitions between the navigation controller's scenes.
 6 | 
 7 | There's also code if you wanted to have a custom transition as the navigation controller, itself. I've placed this in a separate `UIViewControllerTransitioningDelegate` extension, separate from the `UINavigationControllerDelegate` extension that does the custom transitions between the navigation controller's child scenes. Clearly, if you don't want a custom transition as you initially present the navigation controller, you can remove the `UIViewControllerTransitioningDelegate` extension. Likewise, if you don't need custom transitions between the navigation controller's children, you can comment out the `UINavigationControllerDelegate` extension.
 8 | 
 9 | To implement this, the suggestion was to implement a custom subclass of the navigation controller that would instantiate the custom animation controllers and interaction controllers as necessary:
10 | 
11 | ![schematic](http://i.stack.imgur.com/TCYGC.png)
12 | 
13 | The heart of this is entirely in the custom navigation controller which:
14 | 
15 | - Adds gesture recognizers to its view
16 | 
17 |  - If the gesture is right to left (i.e. push), this looks to see if the source controller conforms to `CustomNavigationControllerDelegate` protocol, namely a method `pushToNextScene` that will initiate the transition to the next scene.
18 | 
19 |  - If the gesture is left to right, this looks to see if there is more than one view controller in the stack, and if so, initiates a pop. If not, we're at the top level and it initiates a dismiss back to the root.
20 | 
21 | - This sets the navigation controller's `delegate` (so that you can customize transition as you push/pop between the navigation controller's own child view controllers).
22 | 
23 | - This sets the navigation controller's `transitionDelegate` (so that you can customize the transition as you present and dismiss the navigation controller itself).
24 | 
25 | See http://stackoverflow.com/questions/26680311/interactive-delegate-methods-never-called/26683223.
26 | 
27 | This is for illustrative purposes only.
28 | 
29 | Developed in Swift 3 on Xcode 8.3 for iOS 8.1. Theoretically it should work fine in iOS 7.0+. Also, the basic ideas are equally applicable for both Swift and Objective-C.
30 | 
31 | ## License
32 | 
33 | Copyright &copy; 2014-2017. Robert Ryan. All rights reserved.
34 | 
35 | <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.
36 | 
37 | --
38 | 
39 | 31 October 2014
40 | 


--------------------------------------------------------------------------------