From cc9f258be075d69a0297bbe464aefeae17c2fecc Mon Sep 17 00:00:00 2001
From: Rico Becker <rico.becker@kf-interactive.com>
Date: Fri, 5 Oct 2018 17:53:58 +0200
Subject: [PATCH 1/4] Updates Swift version to 4.2

---
 MKCubeController.xcodeproj/project.pbxproj           | 11 ++++++++---
 .../xcshareddata/IDEWorkspaceChecks.plist            |  8 ++++++++
 MKCubeController/MKCubeViewController.swift          | 12 ++++++------
 .../MKCubeControllerDemo.xcodeproj/project.pbxproj   | 11 ++++++++---
 .../MKCubeControllerDemo/AppDelegate.swift           |  2 +-
 5 files changed, 31 insertions(+), 13 deletions(-)
 create mode 100644 MKCubeController.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

diff --git a/MKCubeController.xcodeproj/project.pbxproj b/MKCubeController.xcodeproj/project.pbxproj
index 5959b27..67fd172 100644
--- a/MKCubeController.xcodeproj/project.pbxproj
+++ b/MKCubeController.xcodeproj/project.pbxproj
@@ -96,11 +96,12 @@
 		49BBCFE01C598D650052F869 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0920;
+				LastUpgradeCheck = 1010;
 				ORGANIZATIONNAME = "Kevin Malkic";
 				TargetAttributes = {
 					49BBCFE81C598D650052F869 = {
 						CreatedOnToolsVersion = 7.2;
+						LastSwiftMigration = 1010;
 					};
 				};
 			};
@@ -156,12 +157,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -212,12 +215,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -269,7 +274,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -291,7 +296,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.kevinmalkic.MKCubeController;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/MKCubeController.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/MKCubeController.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/MKCubeController.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/MKCubeController/MKCubeViewController.swift b/MKCubeController/MKCubeViewController.swift
index cf50891..74f6035 100644
--- a/MKCubeController/MKCubeViewController.swift
+++ b/MKCubeController/MKCubeViewController.swift
@@ -110,19 +110,19 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
             if animated {
                 
                 let animation: CATransition = CATransition()
-                animation.type = kCATransitionFade
+                animation.type = CATransitionType.fade
                 scrollView.layer.add(animation, forKey: nil)
             }
             
             controller.view!.removeFromSuperview()
-            controller.removeFromParentViewController()
+            controller.removeFromParent()
             
             if let newController = dataSource?.cubeController(cubeController: self, viewControllerAtIndex: index) {
                 
                 controllers[index] = newController
                 newController.view.layer.isDoubleSided = false
                 
-                addChildViewController(newController)
+                addChild(newController)
                 scrollView.addSubview(newController.view!)
                 
                 newController.view.layer.transform = transform
@@ -175,7 +175,7 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
         
             controller.viewWillDisappear(false)
             controller.view!.removeFromSuperview()
-            controller.removeFromParentViewController()
+            controller.removeFromParent()
             controller.viewDidDisappear(false)
         }
         
@@ -219,7 +219,7 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
                 
                 controller.view.autoresizingMask = []
                 controller.view.layer.isDoubleSided = false
-                addChildViewController(controller)
+                addChild(controller)
                 scrollView.addSubview(controller.view)
             }
             
@@ -292,7 +292,7 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
             if !visibleIndices.contains(index) {
                 
                 controller.view!.removeFromSuperview()
-                controller.removeFromParentViewController()
+                controller.removeFromParent()
                 controllers.removeValue(forKey: index)
             }
         }
diff --git a/MKCubeControllerDemo/MKCubeControllerDemo.xcodeproj/project.pbxproj b/MKCubeControllerDemo/MKCubeControllerDemo.xcodeproj/project.pbxproj
index 689dd7d..5fae3b5 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo.xcodeproj/project.pbxproj
+++ b/MKCubeControllerDemo/MKCubeControllerDemo.xcodeproj/project.pbxproj
@@ -117,11 +117,12 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0720;
-				LastUpgradeCheck = 0920;
+				LastUpgradeCheck = 1010;
 				ORGANIZATIONNAME = "Kevin Malkic";
 				TargetAttributes = {
 					0A95A5041C5A342D00430543 = {
 						CreatedOnToolsVersion = 7.2;
+						LastSwiftMigration = 1010;
 					};
 				};
 			};
@@ -194,12 +195,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -247,12 +250,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -292,7 +297,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.ustwo.MKCubeControllerDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -306,7 +311,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.ustwo.MKCubeControllerDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift b/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
index ac6d917..4ebe8e8 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
+++ b/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
@@ -14,7 +14,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, MKCubeViewControllerDataS
 
 	var window: UIWindow?
 
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         
         let controller = MKCubeViewController()
         controller.dataSource = self

From 3454ac91a49b6e3849a9b236443734e50e45ff96 Mon Sep 17 00:00:00 2001
From: Rico Becker <rico.becker@kf-interactive.com>
Date: Fri, 5 Oct 2018 17:58:03 +0200
Subject: [PATCH 2/4] Adds public focal length property

---
 MKCubeController/MKCubeViewController.swift                 | 4 +++-
 MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/MKCubeController/MKCubeViewController.swift b/MKCubeController/MKCubeViewController.swift
index 74f6035..a8d5814 100644
--- a/MKCubeController/MKCubeViewController.swift
+++ b/MKCubeController/MKCubeViewController.swift
@@ -31,6 +31,8 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
     public weak var dataSource: MKCubeViewControllerDataSource?
     public weak var delegate: MKCubeViewControllerDelegate?
     
+    public var focalLength: CGFloat = 500
+    
     private var controllers = [Int: UIViewController]()
     private var scrollOffset: CGFloat = 0
     private var previousOffset: CGFloat = 0
@@ -238,7 +240,7 @@ public class MKCubeViewController: UIViewController, UIScrollViewDelegate {
             
             if angle != 0.0 {
                 
-                transform.m34 = -1.0 / 500
+                transform.m34 = 1.0 / -focalLength
                 transform = CATransform3DTranslate(transform, 0, 0, -view.bounds.size.width / 2.0)
                 transform = CATransform3DRotate(transform, -CGFloat(angle), 0, 1, 0)
                 transform = CATransform3DTranslate(transform, 0, 0, view.bounds.size.width / 2.0)
diff --git a/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift b/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
index 4ebe8e8..a5f8ed9 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
+++ b/MKCubeControllerDemo/MKCubeControllerDemo/AppDelegate.swift
@@ -17,6 +17,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, MKCubeViewControllerDataS
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         
         let controller = MKCubeViewController()
+        controller.focalLength = 1000
         controller.dataSource = self
         controller.wrapEnabled = true
         

From 997a4fb6e77858c07734af4ac57b04dc8744ab15 Mon Sep 17 00:00:00 2001
From: Rico Becker <rico.becker@kf-interactive.com>
Date: Fri, 5 Oct 2018 18:20:01 +0200
Subject: [PATCH 3/4] Adds AutoLayout to example view controller
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Demo didn’t work on iPhones with SafeArea Insets
---
 .../BlueViewController.xib                    | 61 ++++++++++-------
 .../GreenViewController.xib                   | 67 +++++++++++--------
 .../RedViewController.xib                     | 67 +++++++++++--------
 3 files changed, 118 insertions(+), 77 deletions(-)

diff --git a/MKCubeControllerDemo/MKCubeControllerDemo/BlueViewController.xib b/MKCubeControllerDemo/MKCubeControllerDemo/BlueViewController.xib
index 6bed303..182d714 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo/BlueViewController.xib
+++ b/MKCubeControllerDemo/MKCubeControllerDemo/BlueViewController.xib
@@ -1,8 +1,13 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="9531" systemVersion="15D21" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="14460.15" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useSafeAreas="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.9"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
         <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="ViewController">
@@ -12,49 +17,59 @@
         </placeholder>
         <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
         <view contentMode="scaleToFill" id="1">
-            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
+            <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
             <subviews>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Third Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="e9P-CJ-qX9">
-                    <rect key="frame" x="20" y="180" width="280" height="52"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Third Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="e9P-CJ-qX9">
+                    <rect key="frame" x="113" y="225" width="149" height="30"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="25"/>
-                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3XM-Ym-byh">
-                    <rect key="frame" x="64" y="335" width="193" height="61"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="3XM-Ym-byh">
+                    <rect key="frame" x="91" y="400" width="193" height="61"/>
+                    <constraints>
+                        <constraint firstAttribute="width" constant="193" id="4QR-tm-ufp"/>
+                    </constraints>
                     <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="gHo-rF-lxG">
-                    <rect key="frame" x="20" y="22" width="51" height="30"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="gHo-rF-lxG">
+                    <rect key="frame" x="20" y="22" width="41" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Back">
-                        <color key="titleColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goBack" destination="-1" eventType="touchUpInside" id="jba-wI-8fN"/>
                     </connections>
                 </button>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="vqb-xC-8jj">
-                    <rect key="frame" x="227" y="20" width="73" height="33"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="vqb-xC-8jj">
+                    <rect key="frame" x="287" y="20" width="68" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Forward">
-                        <color key="titleColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goForward" destination="-1" eventType="touchUpInside" id="z9b-pk-dQK"/>
                     </connections>
                 </button>
             </subviews>
-            <color key="backgroundColor" red="0.39215686274509803" green="0.78431372549019607" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+            <color key="backgroundColor" red="0.39215686274509803" green="0.78431372549019607" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstItem="3XM-Ym-byh" firstAttribute="top" secondItem="e9P-CJ-qX9" secondAttribute="bottom" constant="145" id="3j2-Kz-J7a"/>
+                <constraint firstItem="gHo-rF-lxG" firstAttribute="leading" secondItem="5v3-8q-SxL" secondAttribute="leading" constant="20" id="7gu-G3-StM"/>
+                <constraint firstItem="3XM-Ym-byh" firstAttribute="centerX" secondItem="5v3-8q-SxL" secondAttribute="centerX" id="9ba-pD-oHS"/>
+                <constraint firstItem="vqb-xC-8jj" firstAttribute="top" secondItem="5v3-8q-SxL" secondAttribute="top" id="avK-is-m40"/>
+                <constraint firstAttribute="trailing" secondItem="vqb-xC-8jj" secondAttribute="trailing" constant="20" id="m8s-6W-7K9"/>
+                <constraint firstItem="e9P-CJ-qX9" firstAttribute="centerY" secondItem="5v3-8q-SxL" secondAttribute="centerY" constant="-103.5" id="pSP-Lg-bRP"/>
+                <constraint firstItem="e9P-CJ-qX9" firstAttribute="centerX" secondItem="5v3-8q-SxL" secondAttribute="centerX" id="yFf-HW-Efb"/>
+                <constraint firstItem="gHo-rF-lxG" firstAttribute="top" secondItem="5v3-8q-SxL" secondAttribute="top" constant="2" id="zuj-M7-iUh"/>
+            </constraints>
+            <viewLayoutGuide key="safeArea" id="5v3-8q-SxL"/>
         </view>
     </objects>
 </document>
diff --git a/MKCubeControllerDemo/MKCubeControllerDemo/GreenViewController.xib b/MKCubeControllerDemo/MKCubeControllerDemo/GreenViewController.xib
index 82c2b1b..996418f 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo/GreenViewController.xib
+++ b/MKCubeControllerDemo/MKCubeControllerDemo/GreenViewController.xib
@@ -1,8 +1,13 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="4514" systemVersion="13A603" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="14460.15" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useSafeAreas="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
-        <deployment defaultVersion="1072" identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3746"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.9"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
         <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="ViewController">
@@ -12,51 +17,59 @@
         </placeholder>
         <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
         <view contentMode="scaleToFill" id="1">
-            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
+            <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
             <subviews>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Second Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="70Y-rt-YDe">
-                    <rect key="frame" x="20" y="180" width="280" height="52"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Second Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="70Y-rt-YDe">
+                    <rect key="frame" x="99" y="225" width="177" height="30"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="25"/>
-                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3Jd-cf-y9z">
-                    <rect key="frame" x="64" y="335" width="193" height="61"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="3Jd-cf-y9z">
+                    <rect key="frame" x="91" y="400" width="193" height="61"/>
+                    <constraints>
+                        <constraint firstAttribute="width" constant="193" id="R9d-g9-doE"/>
+                    </constraints>
                     <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="BNj-gL-I3h">
-                    <rect key="frame" x="20" y="22" width="51" height="30"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="BNj-gL-I3h">
+                    <rect key="frame" x="20" y="22" width="41" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Back">
-                        <color key="titleColor" white="0.0" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goBack" destination="-1" eventType="touchUpInside" id="Kdp-1J-dLn"/>
                     </connections>
                 </button>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="3Xj-zc-gyT">
-                    <rect key="frame" x="230" y="20" width="70" height="33"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="3Xj-zc-gyT">
+                    <rect key="frame" x="287" y="20" width="68" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Forward">
-                        <color key="titleColor" white="0.0" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goForward" destination="-1" eventType="touchUpInside" id="Vgz-PB-QsU"/>
                     </connections>
                 </button>
             </subviews>
-            <color key="backgroundColor" red="0.39215686274509803" green="1" blue="0.78431372549019607" alpha="1" colorSpace="calibratedRGB"/>
-            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
-            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+            <color key="backgroundColor" red="0.39215686274509803" green="1" blue="0.78431372549019607" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstItem="70Y-rt-YDe" firstAttribute="centerX" secondItem="UjC-z1-5kj" secondAttribute="centerX" id="6tV-eX-71Q"/>
+                <constraint firstItem="3Xj-zc-gyT" firstAttribute="top" secondItem="UjC-z1-5kj" secondAttribute="top" id="AUi-M5-Mpc"/>
+                <constraint firstItem="70Y-rt-YDe" firstAttribute="centerY" secondItem="UjC-z1-5kj" secondAttribute="centerY" constant="-103.5" id="PiX-ZN-hFC"/>
+                <constraint firstItem="3Jd-cf-y9z" firstAttribute="top" secondItem="70Y-rt-YDe" secondAttribute="bottom" constant="145" id="hNe-4c-4fN"/>
+                <constraint firstItem="BNj-gL-I3h" firstAttribute="top" secondItem="UjC-z1-5kj" secondAttribute="top" constant="2" id="m6y-82-vdZ"/>
+                <constraint firstItem="BNj-gL-I3h" firstAttribute="leading" secondItem="1" secondAttribute="leading" constant="20" id="txg-3A-tsD"/>
+                <constraint firstAttribute="trailing" secondItem="3Xj-zc-gyT" secondAttribute="trailing" constant="20" id="xnK-Vg-uD6"/>
+                <constraint firstItem="3Jd-cf-y9z" firstAttribute="centerX" secondItem="UjC-z1-5kj" secondAttribute="centerX" id="zMc-VM-R92"/>
+            </constraints>
+            <viewLayoutGuide key="safeArea" id="UjC-z1-5kj"/>
         </view>
     </objects>
-</document>
\ No newline at end of file
+</document>
diff --git a/MKCubeControllerDemo/MKCubeControllerDemo/RedViewController.xib b/MKCubeControllerDemo/MKCubeControllerDemo/RedViewController.xib
index d3e2ffd..f34194e 100644
--- a/MKCubeControllerDemo/MKCubeControllerDemo/RedViewController.xib
+++ b/MKCubeControllerDemo/MKCubeControllerDemo/RedViewController.xib
@@ -1,8 +1,13 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="4514" systemVersion="13A603" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="14460.15" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useSafeAreas="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
-        <deployment defaultVersion="1072" identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3746"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.9"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
         <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="ViewController">
@@ -12,51 +17,59 @@
         </placeholder>
         <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
         <view contentMode="scaleToFill" id="1">
-            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
+            <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
             <subviews>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="First Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="pnE-wA-Xd7">
-                    <rect key="frame" x="20" y="181" width="280" height="52"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="First Screen" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="pnE-wA-Xd7">
+                    <rect key="frame" x="117.5" y="226" width="140" height="30"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="25"/>
-                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="wTt-Vq-iaO">
-                    <rect key="frame" x="64" y="336" width="193" height="61"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Swipe right or left to move to the previous or next screens" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="wTt-Vq-iaO">
+                    <rect key="frame" x="91" y="402" width="193" height="61"/>
+                    <constraints>
+                        <constraint firstAttribute="width" constant="193" id="7IE-fC-79T"/>
+                    </constraints>
                     <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                    <color key="textColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     <nil key="highlightedColor"/>
                 </label>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="Qea-Z2-gIc">
-                    <rect key="frame" x="20" y="20" width="51" height="30"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Qea-Z2-gIc">
+                    <rect key="frame" x="20" y="20" width="41" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Back">
-                        <color key="titleColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goBack" destination="-1" eventType="touchUpInside" id="lXt-Sd-8i5"/>
                     </connections>
                 </button>
-                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="v7i-VY-jGm">
-                    <rect key="frame" x="227" y="18" width="81" height="33"/>
-                    <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxY="YES"/>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="v7i-VY-jGm">
+                    <rect key="frame" x="295" y="18" width="68" height="33"/>
                     <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                     <state key="normal" title="Forward">
-                        <color key="titleColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                        <color key="titleShadowColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                        <color key="titleColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="titleShadowColor" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                     </state>
                     <connections>
                         <action selector="goForward" destination="-1" eventType="touchUpInside" id="DBc-cj-Ip3"/>
                     </connections>
                 </button>
             </subviews>
-            <color key="backgroundColor" red="1" green="0.39215686274509803" blue="0.39215686274509803" alpha="1" colorSpace="calibratedRGB"/>
-            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
-            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+            <color key="backgroundColor" red="1" green="0.39215686274509803" blue="0.39215686274509803" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstItem="Qea-Z2-gIc" firstAttribute="top" secondItem="B2L-j0-H4q" secondAttribute="top" id="3yS-tC-wT7"/>
+                <constraint firstAttribute="trailing" secondItem="v7i-VY-jGm" secondAttribute="trailing" constant="12" id="DU5-QI-sAa"/>
+                <constraint firstItem="v7i-VY-jGm" firstAttribute="top" secondItem="B2L-j0-H4q" secondAttribute="top" constant="-2" id="IKL-Gd-jIX"/>
+                <constraint firstItem="pnE-wA-Xd7" firstAttribute="centerX" secondItem="1" secondAttribute="centerX" id="Kxz-Bv-4eJ"/>
+                <constraint firstItem="Qea-Z2-gIc" firstAttribute="leading" secondItem="1" secondAttribute="leading" constant="20" id="MdE-rm-gP6"/>
+                <constraint firstItem="wTt-Vq-iaO" firstAttribute="centerX" secondItem="1" secondAttribute="centerX" id="RyH-Re-G2A"/>
+                <constraint firstItem="wTt-Vq-iaO" firstAttribute="top" secondItem="pnE-wA-Xd7" secondAttribute="bottom" constant="146" id="Ts5-dW-dWV"/>
+                <constraint firstItem="pnE-wA-Xd7" firstAttribute="centerY" secondItem="1" secondAttribute="centerY" constant="-92.5" id="gv9-Kc-mox"/>
+            </constraints>
+            <viewLayoutGuide key="safeArea" id="B2L-j0-H4q"/>
         </view>
     </objects>
-</document>
\ No newline at end of file
+</document>

From 7c3be343c94516d4cbef9ed3ba91602e7aacaeeb Mon Sep 17 00:00:00 2001
From: Rico Becker <rico.becker@kf-interactive.com>
Date: Fri, 5 Oct 2018 18:42:38 +0200
Subject: [PATCH 4/4] Update README.md

---
 README.md | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index 7a356a4..a3a138e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # MKCubeController
 
-MKCubeController is used to create a rotating 3D cube navigation in Swift 2.1. (translated from @nicklockwood CubeController)
+MKCubeController is used to create a rotating 3D cube navigation in Swift 4.2. (translated from @nicklockwood CubeController)
 here the link https://github.com/nicklockwood/CubeController
 Pretty much the same logic.
 
@@ -20,28 +20,21 @@ controller.wrapEnabled = true
 And implement MKCubeViewControllerDataSource
 ```swift
 func numberOfViewControllersInCubeController(cubeController: MKCubeViewController) -> Int {
-	
 	return 3
 }
 
 func cubeController(cubeController: MKCubeViewController, viewControllerAtIndex index: Int) -> UIViewController {
 	
 	switch index % 3 {
-	
 	case 0:
 		return ViewController(nibName: "RedViewController", bundle: nil)
-		
 	case 1:
 		return ViewController(nibName: "GreenViewController", bundle: nil)
-		
 	case 2:
 		return ViewController(nibName: "BlueViewController", bundle: nil)
-		
 	default:
 		break
-
 	}
-	
 	return ViewController()
 }
 ```
@@ -114,4 +107,4 @@ Kevin Malkic
 
 ## License
 
-MKCubeController is released under the MIT license. See LICENSE for details.
\ No newline at end of file
+MKCubeController is released under the MIT license. See LICENSE for details.