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Introduction to tvOS development, given at try! Swift 2016 in Tokyo. 🇯🇵

Transcript

1. ! TRY! SWIFT, MARCH 2016 BORIS BÜGLING - @NEONACHO
3. COCOAPODS
4. CONTENTFUL
6. “‘I’d like to create an integrated television set that is completely easy to use,’ he told me. [...] ‘It will have the simplest user interface you could imagine. I finally cracked it.’”
7. OCTOBER 21, 2011
8. SEPTEMBER 9, 2015
11. The future of TV is iOS
12. 1 1 https://twitter.com/davidolesch/status/656126103921160192
13. WEBKIT
14. MULTIPEERCONNECTIVITY
15. STORAGE LIMITATIONS ▸ app is limited to 200 MB ▸ 500 KB of persistent storage (NSUserDefaults) ▸ Use iCloud ▸ Use On-Demand resources
16. PORTING EXISTING APPS
17. COCOAPODS ▸ Supports tvOS since 0.39.0 ▸ New platform: platform :tvos, '9.0'
18. PODS NOT SUPPORTING TVOS If you are adventurous ! https://github.com/orta/cocoapods-expert-difficulty
19. SPRITEKIT EXAMPLE
21. DOOM CLASSIC ▸ UIKit changes (UIAlertView, UISlider) ▸ AudioSession isn't available ▸ Newer C++ compiler
22. NIBS ! If you don't feel like copy-pasting stuff between NIBs ! https://github.com/neonichu/bohne
23. NO DIRECT MANIPULATION
24. FOCUS ENGINE UIButton().canBecomeFocused() // == true or false UIButton().focused // == true or false UIScreen.mainScreen().focusedView // nil or the view in focus
25. DEMO
26. REACTING TO FOCUS CHANGES func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) context.nextFocusedView // the view which gets the focus context.previouslyFocusedView // the view which had the focus func addCoordinatedAnimations(_ animations: (() -> Void)?, completion completion: (() -> Void)?)
27. CUSTOMFOCUSVIEW class CustomFocusView: UIView { override func canBecomeFocused() -> Bool { return true } }
28. CUSTOMFOCUSVIEW override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) { coordinator.addCoordinatedAnimations({ // ... }, completion: nil) }
29. CUSTOMFOCUSVIEW let duration = UIView.inheritedAnimationDuration() UIView.animateWithDuration(duration, animations: { if context.nextFocusedView == self { self.backgroundColor = UIColor.redColor() } if context.previouslyFocusedView == self { self.backgroundColor = UIColor.whiteColor() } })
30. DEBUGGING FOCUS print(view.performSelector("_whyIsThisViewNotFocusable")) e.g. for a UILabel Unmanaged<AnyObject>(_value: ISSUE: This view has userInteractionEnabled set to NO. Views must allow user interaction to be focusable. ISSUE: This view returns NO from -canBecomeFocused. )
31. GOOD PLACES FOR BREAKPOINTS func shouldUpdateFocusInContext(_ context: UIFocusUpdateContext) -> Bool func didUpdateFocusInContext(_ context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator)
32. GESTURES AND BUTTON PRESSES let tapRecognizer = UITapGestureRecognizer(target: self, action: "tapped:") let pressTypes = [NSNumber(integer: UIPressType.PlayPause.rawValue)] tapRecognizer.allowedPressTypes = pressTypes; self.view.addGestureRecognizer(tapRecognizer) let swipeRecognizer = UISwipeGestureRecognizer(target: self, action: "swiped:") swipeRecognizer.direction = .Right self.view.addGestureRecognizer(swipeRecognizer)
33. LOWER-LEVEL API: UIPress Very similar to UITouch-based API in iOS func pressesBegan(presses: Set<UIPress>, withEvent event: UIPressesEvent?) func pressesEnded(presses: Set<UIPress>, withEvent event: UIPressesEvent?) func pressesChanged(presses: Set<UIPress>, withEvent event: UIPressesEvent?) func pressesCancelled(presses: Set<UIPress>, withEvent event: UIPressesEvent?)
34. TEXT INPUT
35. SIRI?
36. HANDOFF IS ALSO NOT SUPPORTED
37. https://github.com/rsattar/Voucher
38. GAME CONTROLLERS
40. SIRI REMOTE IS ALSO A GAME CONTROLLER ▸ Profile GCMicroGamepad ▸ Touch surface is a dpad ▸ Two action buttons ▸ Motion (GCMotion) ▸ Seems not to work in the simulator
41. NSNotificationCenter.defaultCenter().addObserverForName(GCControllerDidConnectNotification, object: nil, queue: nil) { (note) in if let controller = note.object as? GCController { if let microPad = controller.microGamepad { microPad.dpad.valueChangedHandler = { (_, x, y) in if let paddle = self.childNodeWithName("Paddle") { paddle.position.y += CGFloat(y) } } } } }
42. GAME CONTROLLERS WORK WITH UIKIT COMPONENTS
43. 2.27 If your app’s core functionality doesn’t work with the Siri remote it will be rejected. The app may, however, provide enhanced functionality in connection with a game controller or other peripheral
45. A maximum of two game controllers (plus one remote) can be connected to an Apple TV at any given time.
46. DEMO
47. TVML
48. CONCLUSION ▸ tvOS works very well ▸ If you know UIKit, it's easy to start ▸ Think about interaction
49. RESOURCES ▸ https://developer.apple.com/tvos/human-interface-guidelines/ ▸ "Ich glotz TV", @avbelow, Macoun 2015 ▸ https://speakerdeck.com/toco/intro-to-tvos ▸ http://nerds.airbnb.com/tvos-focus-engine/ ▸ https://eternalstorms.wordpress.com/2015/10/05/pair-the-apple- tv-developer-kit-siri-remote-with-xcodes-simulator/
50. THANKS!
51. @NeoNacho boris@contentful.com http://buegling.com/talks