I’ve been meaning to look at this since 2013. Easy to get a second screen. Next, interacting with it.<\/p>\n
References: I’ve been meaning to look at this since 2013. Easy to get a second screen. Next, interacting with it. References: Understanding Windows and Screens UIWindow UIScreen Presenting Content on an External Display \/\/ ViewController.swift import UIKit class ViewController: UIViewController { override func loadView() { let overall = UIView(frame: UIScreen.main.bounds) self.view = overall } override func … <\/p>\n
\nUnderstanding Windows and Screens<\/a>
\nUIWindow<\/a>
\nUIScreen<\/a>
\nPresenting Content on an External Display<\/a><\/p>\n\r\n\/\/ ViewController.swift\r\n\r\nimport UIKit\r\n\r\nclass ViewController: UIViewController {\r\n \r\n override func loadView() {\r\n let overall = UIView(frame: UIScreen.main.bounds)\r\n self.view = overall\r\n }\r\n\r\n override func viewDidLoad() {\r\n super.viewDidLoad()\r\n \/\/ Do any additional setup after loading the view, typically from a nib.\r\n }\r\n}\r\n<\/pre>\n\r\n\/\/ SecondViewController.swift\r\n\r\nimport UIKit\r\n\r\nclass ViewController: UIViewController {\r\n \r\n override func loadView() {\r\n let overall = UIView(frame: UIScreen.main.bounds)\r\n self.view = overall\r\n }\r\n\r\n override func viewDidLoad() {\r\n super.viewDidLoad()\r\n \/\/ Do any additional setup after loading the view, typically from a nib.\r\n }\r\n}\r\n<\/pre>\n\r\n\/\/ AppDelegate.swift\r\n\r\nimport UIKit\r\nimport CoreData\r\n\r\n@UIApplicationMain\r\nclass AppDelegate: UIResponder, UIApplicationDelegate {\r\n\r\n var window: UIWindow?\r\n var secondWindow: UIWindow?\r\n\r\n func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {\r\n \/\/ Override point for customization after application launch.\r\n \r\n \/\/ Understanding Windows and Screens<\/a>In rare cases you might want to create your app\u2019s window programmatically https:\/\/developer.apple.com\/library\/content\/documentation\/WindowsViews\/Conceptual\/WindowAndScreenGuide\/WindowScreenRolesinApp\/WindowScreenRolesinApp.html#\/\/apple_ref\/doc\/uid\/TP40012555-CH4-SW1\r\n window = UIWindow(frame: UIScreen.main.bounds)\r\n let myViewController = ViewController()\r\n window!.rootViewController = myViewController\r\n window!.backgroundColor = UIColor.purple\r\n window!.makeKeyAndVisible()\r\n \r\n setUpScreenConnectionNotificationHandlers()\r\n checkForExistingSecondScreen()\r\n \r\n return true\r\n }\r\n \r\n \/\/ Listing 2-1 Checking for the presence of an external display https:\/\/developer.apple.com\/library\/content\/documentation\/WindowsViews\/Conceptual\/WindowAndScreenGuide\/UsingExternalDisplay\/UsingExternalDisplay.html#\/\/apple_ref\/doc\/uid\/TP40012555-CH3-SW3\r\n func checkForExistingSecondScreen () {\r\n\r\n if (UIScreen.screens.count > 1) {\r\n \/\/ Get the screen object that represents the external display.\r\n let secondScreen = UIScreen.screens[1]\r\n \/\/ Get the screen's bounds so that you can create a window of the correct size.\r\n let secondScreenBounds = secondScreen.bounds\r\n \r\n secondWindow = UIWindow(frame: secondScreenBounds)\r\n secondWindow!.screen = secondScreen\r\n \/\/ Set up initial content to display...\r\n let mySecondViewController = SecondViewController()\r\n secondWindow!.rootViewController = mySecondViewController\r\n secondWindow!.backgroundColor = UIColor.lightGray\r\n \/\/ Show the window.\r\n secondWindow!.isHidden = false\r\n }\r\n }\r\n\r\n \/\/ Listing 2-2 Registering for screen connection and disconnection notifications https:\/\/developer.apple.com\/library\/content\/documentation\/WindowsViews\/Conceptual\/WindowAndScreenGuide\/UsingExternalDisplay\/UsingExternalDisplay.html#\/\/apple_ref\/doc\/uid\/TP40012555-CH3-SW6\r\n func setUpScreenConnectionNotificationHandlers() {\r\n let center = NotificationCenter.default\r\n center.addObserver(self, selector: #selector(handleScreenDidConnect(notification:)), name: NSNotification.Name.UIScreenDidConnect, object: nil)\r\n center.addObserver(self, selector: #selector(handleScreenDidDisconnect(notification:)), name: NSNotification.Name.UIScreenDidDisconnect, object: nil)\r\n }\r\n func handleScreenDidConnect(notification:NSNotification) {\r\n\r\n let secondScreen = notification.object as! UIScreen\r\n let secondScreenBounds = secondScreen.bounds\r\n if (secondWindow == nil) {\r\n secondWindow = UIWindow(frame: secondScreenBounds)\r\n secondWindow!.screen = secondScreen\r\n \/\/ Set up initial content to display...\r\n let mySecondViewController = SecondViewController()\r\n secondWindow!.rootViewController = mySecondViewController\r\n secondWindow!.backgroundColor = UIColor.darkGray\r\n \/\/ Show the window.\r\n secondWindow!.isHidden = false\r\n }\r\n }\r\n func handleScreenDidDisconnect(notification:NSNotification) {\r\n\r\n if (secondWindow != nil) {\r\n \/\/ Hide and then delete the window.\r\n secondWindow?.isHidden = true\r\n secondWindow = nil\r\n }\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"