Update to Swift 3

ToDoList.xcodeproj/project.pbxproj

@@ -181,9 +181,11 @@
 				TargetAttributes = {
 					954D24811B7A2DDA00DD9E4E = {
 						CreatedOnToolsVersion = 6.4;
+						LastSwiftMigration = 0830;
 					};
 					954D24961B7A2DDA00DD9E4E = {
 						CreatedOnToolsVersion = 6.4;
+						LastSwiftMigration = 0830;
 						TestTargetID = 954D24811B7A2DDA00DD9E4E;
 					};
 				};
@@ -371,6 +373,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.purecreek.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
 			};
 			name = Debug;
 		};
@@ -382,6 +385,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.purecreek.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
 			};
 			name = Release;
 		};
@@ -401,6 +405,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.purecreek.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/ToDoList.app/ToDoList";
 			};
 			name = Debug;
@@ -417,6 +422,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.purecreek.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/ToDoList.app/ToDoList";
 			};
 			name = Release;

ToDoList/AddToDoItemViewController.swift

@@ -15,14 +15,14 @@ class AddToDoItemViewController: UIViewController {
 
 	var stateController: StateController?
 
-	override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
-		guard let tappedButton = sender as? UIBarButtonItem where tappedButton != cancelButton else {
+	override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+		guard let tappedButton = sender as? UIBarButtonItem, tappedButton != cancelButton else {
 			return;
 		}
 		guard let text = nameTextField.text else {
 			return
 		}
-		let todoItem = ToDoItem(name: text, completed: false, creationDate: NSDate())
+		let todoItem = ToDoItem(name: text, completed: false, creationDate: Date())
 		stateController?.addItem(todoItem)
 	}
 

ToDoList/AppDelegate.swift

@@ -14,19 +14,19 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 	var window: UIWindow?
 	let stateController = StateController()
 
-	func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
+	func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
 		if let navigationController = window?.rootViewController as? UINavigationController,
 			let toDoListTableViewController = navigationController.viewControllers.first as? ToDoListTableViewController {
 			toDoListTableViewController.stateController = stateController
 		}
 		return true
 	}
 
-	func applicationWillTerminate(application: UIApplication) {
+	func applicationWillTerminate(_ application: UIApplication) {
 		stateController.save()
 	}
 
-	func applicationWillResignActive(application: UIApplication) {
+	func applicationWillResignActive(_ application: UIApplication) {
 		stateController.save()
 	}
 }

ToDoList/StateController.swift

@@ -9,21 +9,21 @@
 import Foundation
 
 class StateController {
-	static let itemsFilePath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first! + "/items.txt"
+	static let itemsFilePath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first! + "/items.txt"
 
-	private(set) var items: [ToDoItem] = {
-		if let items = NSKeyedUnarchiver.unarchiveObjectWithFile(itemsFilePath) as? [ToDoItem] {
+	fileprivate(set) var items: [ToDoItem] = {
+		if let items = NSKeyedUnarchiver.unarchiveObject(withFile: itemsFilePath) as? [ToDoItem] {
 			return items
 		} else {
 			return [ToDoItem]()
 		}
 	}()
 
-	func addItem(item: ToDoItem) {
+	func addItem(_ item: ToDoItem) {
 		items.append(item)
 	}
 
 	func save() {
 		NSKeyedArchiver.archiveRootObject(self.items, toFile: StateController.itemsFilePath)
 	}
-}
+}

ToDoList/TableViewDataSource.swift

@@ -20,16 +20,16 @@ class TableViewDataSource: NSObject {
 
 extension TableViewDataSource: UITableViewDataSource {
 
-	func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+	func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
 		return stateController.items.count
 	}
 
-	func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
+	func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
 		let toDoItem = stateController.items[indexPath.row]
-		let cell = tableView.dequeueReusableCellWithIdentifier(ToDoItemCell.identifier, forIndexPath: indexPath) as! ToDoItemCell
+		let cell = tableView.dequeueReusableCell(withIdentifier: ToDoItemCell.identifier, for: indexPath) as! ToDoItemCell
 		cell.name = toDoItem.name
 		cell.completed = toDoItem.completed
 		return cell
 	}
 
-}
+}

ToDoList/TableViewDelegate.swift

@@ -20,11 +20,11 @@ class TableViewDelegate: NSObject {
 
 extension TableViewDelegate: UITableViewDelegate {
 
-	func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
-		tableView.deselectRowAtIndexPath(indexPath, animated: false)
+	func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+		tableView.deselectRow(at: indexPath, animated: false)
 		let tappedItem = stateController.items[indexPath.row]
 		tappedItem.completed = !tappedItem.completed
-		tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None)
+		tableView.reloadRows(at: [indexPath], with: UITableViewRowAnimation.none)
 	}
 
-}
+}

ToDoList/ToDoItem.swift

@@ -10,25 +10,25 @@ import Foundation
 
 class ToDoItem: NSObject, NSCoding {
 	let name: String
-	let creationDate: NSDate
+	let creationDate: Date
 	var completed: Bool
 
-	init(name: String, completed: Bool, creationDate: NSDate) {
+	init(name: String, completed: Bool, creationDate: Date) {
 		self.name = name
 		self.completed = completed
 		self.creationDate = creationDate
 	}
 
 	required init?(coder aDecoder: NSCoder) {
-		name = aDecoder.decodeObjectForKey(Keys.Name.rawValue) as! String
-		completed = aDecoder.decodeObjectForKey(Keys.Completed.rawValue) as! Bool
-		creationDate = aDecoder.decodeObjectForKey(Keys.CreationDate.rawValue) as! NSDate
+		name = aDecoder.decodeObject(forKey: Keys.Name.rawValue) as! String
+		completed = aDecoder.decodeObject(forKey: Keys.Completed.rawValue) as! Bool
+		creationDate = aDecoder.decodeObject(forKey: Keys.CreationDate.rawValue) as! Date
 	}
 
-	func encodeWithCoder(aCoder: NSCoder) {
-		aCoder.encodeObject(name, forKey: Keys.Name.rawValue)
-		aCoder.encodeObject(completed, forKey: Keys.Completed.rawValue)
-		aCoder.encodeObject(creationDate, forKey: Keys.CreationDate.rawValue)
+	func encode(with aCoder: NSCoder) {
+		aCoder.encode(name, forKey: Keys.Name.rawValue)
+		aCoder.encode(completed, forKey: Keys.Completed.rawValue)
+		aCoder.encode(creationDate, forKey: Keys.CreationDate.rawValue)
 	}
 
 	enum Keys: String {

ToDoList/ToDoItemCell.swift

@@ -20,9 +20,9 @@ class ToDoItemCell: UITableViewCell {
 	var completed: Bool = false {
 		didSet {
 			if (completed) {
-				accessoryType = UITableViewCellAccessoryType.Checkmark
+				accessoryType = UITableViewCellAccessoryType.checkmark
 			} else {
-				accessoryType = UITableViewCellAccessoryType.None;
+				accessoryType = UITableViewCellAccessoryType.none;
 			}
 		}
 	}

ToDoList/ToDoListTableViewController.swift

@@ -22,19 +22,19 @@ class ToDoListTableViewController: UITableViewController {
 		}
 	}
 
-	override func viewWillAppear(animated: Bool) {
+	override func viewWillAppear(_ animated: Bool) {
 		super.viewWillAppear(animated)
 		tableView.reloadData()
 	}
 
-	override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
-		if let navigationController = segue.destinationViewController as? UINavigationController,
+	override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+		if let navigationController = segue.destination as? UINavigationController,
 			let addToDoItemViewController = navigationController.viewControllers.first as? AddToDoItemViewController {
 			addToDoItemViewController.stateController = stateController
 		}
 	}
 
-	@IBAction func unwindToList(segue: UIStoryboardSegue) {
+	@IBAction func unwindToList(_ segue: UIStoryboardSegue) {
 
 	}
 

ToDoListTests/ToDoListTests.swift

@@ -28,7 +28,7 @@ class ToDoListTests: XCTestCase {
 
     func testPerformanceExample() {
         // This is an example of a performance test case.
-        self.measureBlock() {
+        self.measure() {
             // Put the code you want to measure the time of here.
         }
     }