Practical WatchKit

Given at NSLondon on 23/04/2015.

Transcript

1. PRACTICAL WATCHKIT BY @NEILKIMMETT
5. mandsdigital.com
9. HOW?
14. WKInterfaceButton
15. class WKInterfaceButton : WKInterfaceObject { func setTitle(title: String?) func setAttributedTitle(attributedTitle: NSAttributedString?) func setBackgroundColor(color: UIColor?) func setBackgroundImage(image: UIImage?) func setBackgroundImageData(imageData: NSData?) func setBackgroundImageNamed(imageName: String?) func setEnabled(enabled: Bool) }
16. button.setText("I'm a button")
24. SHARED APP GROUP
25. NSUSERDEFAULTS let group = "group.me.kimmett.pushthebutton" let defaults = NSUserDefaults(suiteName: group) defaults?.setInteger(42, forKey: "IMPORTANT_NUMBER") defaults?.integerForKey("IMPORTANT_NUMBER") // 42
26. NSFILEMANAGER let group = "group.me.kimmett.pushthebutton" let manager = NSFileManager.defaultManager() if let dir = manager.containerURLForSecurityApplicationGroupIdentifier(group) { // do something with dir }
27. CORE DATA?
28. CORE DATA if let dir = manager.containerURLForSecurityApplicationGroupIdentifier(group) { let url = dir.URLByAppendingPathComponent(“Database.sqlite”) let coordinator = … coordinator.migratePersistentStore(store, toURL: url, options: nil, withType: NSSQLiteStoreType, error: &error) }
30. “on Yosemite and iOS 8, the method discards many-to-many relationships” — http://mjtsai.com/blog/2014/11/22/core-data-relationships-data- loss-bug/
31. FIXED IN IOS 8.2
32. MOVE THESE FILES .sqlite .sqlite-wal .sqlite-shm
33. REAL TIME SYNC?
34. REAL TIME SYNC ▸ MMWormhole https://github.com/mutualmobile/MMWormhole ▸ WFNotificationCenter https://github.com/DeskConnect/WFNotificationCenter
35. WKINTERFACECONTROLLER class func openParentApplication( userInfo: [NSObject : AnyObject], reply: (([NSObject : AnyObject]!, NSError!) -> Void)?) -> Bool UIAPPLICATIONDELEGATE func application(application: UIApplication, handleWatchKitExtensionRequest: [NSObject : AnyObject]?, reply: (([NSObject : AnyObject]!) -> Void)!)
36. OPENPARENTAPPLICATION var task: UIBackgroundTaskIdentifier task = application.beginBackgroundTaskWithExpirationHandler { reply([:]) application.endBackgroundTask(task) task = UIBackgroundTaskInvalid } // do something with userInfo reply(…) application.endBackgroundTask(task) task = UIBackgroundTaskInvalid
37. ONE WEIRD TRICK... “…you have to begin – and end, after two seconds – an empty background task right at the beginning of the delegate method.” — http://www.fiveminutewatchkit.com/blog/2015/3/11/one-weird- trick-to-fix-openparentapplicationreply
38. ONE WEIRD TRICK... var bogusTask: UIBackgroundTaskIdentifier bogusTask = application.beginBackgroundTaskWithExpirationHandler { application.endBackgroundTask(bogusTask) } let time = dispatch_time(DISPATCH_TIME_NOW, Int64(2 * Double(NSEC_PER_SEC))) dispatch_after(time, dispatch_get_main_queue(), { UIApplication.sharedApplication().endBackgroundTask(bogusTask) }) // do your actual work
39. HANDOFF
40. WKINTERFACECONTROLLER func updateUserActivity(type: String, userInfo: [NSObject : AnyObject]?, webpageURL: NSURL?) UIAPPLICATIONDELEGATE func application(application: UIApplication, continueUserActivity: NSUserActivity, restorationHandler: ([AnyObject]!) -> Void) -> Bool
41. DESIGN TIPS
42. BLACK IS THE NEW WHITE
43. BLACK IS THE NEW WHITE
44. BLACK IS THE NEW WHITE
47. REDUCE "TAP DISTANCE"
48. REDUCE "TAP DISTANCE"
50. REDUCE PADDING
51. REDUCE PADDING
52. REDUCE PADDING
53. REDUCE PADDING
54. REFERENCES ▸ “Core Data Relationships Data Loss Bug” by Michael Tsai http://mjtsai.com/blog/2014/11/22/core-data-relationships-data- loss-bug/ ▸ “Tap Distance” by David Smith http://david-smith.org/blog/2015/02/03/ailw-tap-distance/
55. REFERENCES ▸ “One weird trick to “fix” openParentApplication:reply:” by Brian Gilham http://www.fiveminutewatchkit.com/blog/2015/3/11/one-weird- trick-to-fix-openparentapplicationreply
56. SLIDES http://kimmett.me/talks/practical-watchkit.html
57. QUESTIONS?