Updated to Swift 4, removed some unnecessary code and cleaned the example project

Example/Example.xcodeproj/project.pbxproj

@@ -103,7 +103,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0710;
-				LastUpgradeCheck = 0710;
+				LastUpgradeCheck = 0920;
 				TargetAttributes = {
 					F18E158F1C0E36830038FFD3 = {
 						CreatedOnToolsVersion = 7.1.1;
@@ -182,13 +182,21 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = 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_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
@@ -226,13 +234,21 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = 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_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
@@ -251,6 +267,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
+				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -263,6 +280,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.example.Example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -274,6 +292,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.example.Example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};

Example/Example/AppDelegate.swift

@@ -10,43 +10,10 @@ import UIKit
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
-
     var window: UIWindow?
 
-
     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
-        // Override point for customization after application launch.
-
-        let controller = ViewController()
-        let navigationController = UINavigationController(rootViewController: controller)
-
-        self.window?.rootViewController = navigationController
-
         return true
     }
-
-    func applicationWillResignActive(application: UIApplication) {
-        // 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.
-        // 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.
-    }
-
-    func applicationDidEnterBackground(application: UIApplication) {
-        // 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.
-        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
-    }
-
-    func applicationWillEnterForeground(application: UIApplication) {
-        // 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.
-    }
-
-    func applicationDidBecomeActive(application: UIApplication) {
-        // 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.
-    }
-
-    func applicationWillTerminate(application: UIApplication) {
-        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
-    }
-
-
 }
 

Example/Example/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,5 +1,15 @@
 {
   "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
     {
       "idiom" : "iphone",
       "size" : "29x29",
@@ -29,6 +39,11 @@
       "idiom" : "iphone",
       "size" : "60x60",
       "scale" : "3x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
     }
   ],
   "info" : {

Example/Example/Base.lproj/Main.storyboard

@@ -1,25 +1,50 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="cHS-hI-EIt">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="Example" customModuleProvider="target" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
                     </layoutGuides>
                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
-                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     </view>
+                    <navigationItem key="navigationItem" id="FK3-Cb-qmR"/>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
             </objects>
+            <point key="canvasLocation" x="372" y="32.833583208395808"/>
+        </scene>
+        <!--Navigation Controller-->
+        <scene sceneID="pzG-Uk-Deo">
+            <objects>
+                <navigationController automaticallyAdjustsScrollViewInsets="NO" id="cHS-hI-EIt" sceneMemberID="viewController">
+                    <toolbarItems/>
+                    <navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="HO8-d9-5xa">
+                        <rect key="frame" x="0.0" y="20" width="375" height="44"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </navigationBar>
+                    <nil name="viewControllers"/>
+                    <connections>
+                        <segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="Pzu-vO-yur"/>
+                    </connections>
+                </navigationController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="jND-TW-voR" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="-412" y="33"/>
         </scene>
     </scenes>
 </document>

Example/Example/ViewController.swift

@@ -10,30 +10,20 @@ import UIKit
 
 class ViewController: UIViewController, UITextViewDelegate {
 
-    var textView : VerticalTextView!
+    var textView: VerticalTextView!
 
     override func viewDidLoad() {
         super.viewDidLoad()
+        title = "VerticalTextView"
 
-        self.title = "VerticalTextView"
+        textView = VerticalTextView(frame: view.bounds)
+        textView.delegate = self
+        textView.font = UIFont.systemFont(ofSize: 14)
+        textView.textColor = UIColor.black
+        textView.text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed fermentum massa eu pulvinar fermentum."
+        textView.verticalAlignment = .middle
 
-        self.textView = VerticalTextView(frame: self.view.bounds)
-        self.textView.delegate = self
-        self.textView.font = UIFont.systemFontOfSize(14)
-        self.textView.textColor = UIColor.blackColor()
-
-        self.textView.text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed fermentum massa eu pulvinar fermentum."
-
-        self.textView.verticalAlignment = .Middle
-
-        self.view.addSubview(self.textView)
-        // Do any additional setup after loading the view, typically from a nib.
+        view.addSubview(textView)
     }
-
-    override func didReceiveMemoryWarning() {
-        super.didReceiveMemoryWarning()
-        // Dispose of any resources that can be recreated.
-    }
-
 }
 

Source/VerticalTextView.swift

@@ -23,38 +23,40 @@ import UIKit
 
 class VerticalTextView: UITextView {
 
-    enum VerticalAlignment: Int {
-        case Top = 0, Middle, Bottom
+    enum VerticalAlignment {
+        case top
+        case middle
+        case bottom
     }
 
-    var verticalAlignment: VerticalAlignment = .Middle
+    var verticalAlignment: VerticalAlignment = .middle
 
-    //override contentSize property and observe using didSet
+    // Override contentSize property and observe using didSet
     override var contentSize: CGSize {
         didSet {
-            let height = self.bounds.size.height
-            let contentHeight: CGFloat = contentSize.height
+            let height = bounds.size.height
+            let contentHeight = contentSize.height
             var topCorrect: CGFloat = 0.0
 
-            switch (self.verticalAlignment) {
-            case .Top:
-                self.contentOffset = CGPointZero //set content offset to top
+            switch verticalAlignment {
+            case .top:
+                contentOffset = .zero //set content offset to top
 
-            case .Middle:
-                topCorrect = (height - contentHeight * self.zoomScale) / 2.0
+            case .middle:
+                topCorrect = (height - contentHeight * zoomScale) / 2.0
                 topCorrect = topCorrect < 0 ? 0 : topCorrect
-                self.contentOffset = CGPoint(x: 0, y: -topCorrect)
+                contentOffset = CGPoint(x: 0, y: -topCorrect)
 
-            case .Bottom:
+            case .bottom:
                 topCorrect = self.bounds.size.height - contentHeight
                 topCorrect = topCorrect < 0 ? 0 : topCorrect
-                self.contentOffset = CGPoint(x: 0, y: -topCorrect)
+                contentOffset = CGPoint(x: 0, y: -topCorrect)
             }
 
             if contentHeight >= height { // if the contentSize is greater than the height
                 topCorrect = contentHeight - height // set the contentOffset to be the
                 topCorrect = topCorrect < 0 ? 0 : topCorrect // contentHeight - height of textView
-                self.contentOffset = CGPoint(x: 0, y: topCorrect)
+                contentOffset = CGPoint(x: 0, y: topCorrect)
             }
         }
     }
@@ -63,9 +65,8 @@ class VerticalTextView: UITextView {
 
     override func layoutSubviews() {
         super.layoutSubviews()
-
         let size = self.contentSize // forces didSet to be called
-        self.contentSize = size
+        contentSize = size
     }
 
-}
+}