[#2 Swift Meetup SP - 2017] Heurísticas e Swift: Do “NSProcessInfo” à um shake no Apple Watch

Transcript

1. Swift Meetup SP Heurísticas e Swift: Do “NSProcessInfo” a um

   shake no Apple Watch Ezequiel França

2. Mecatrônica @ SENAI Automação Industrial @ IFSP Analise de Sistemas

   @ FIAP Desenvolvedor iOS, Maker e open-source hacker. Ezequiel França

3. https://www.youtube.com/watch?v=BoeRfMBVCGo

4. None

5. Swift Meetup SP ❤

6. Heurísticas?

7. None
8. None
9. None
10. None
11. None
12. None
13. None

14. http://mathwiki.cs.ut.ee/asymptotics/05_polynomial_complexity

15. Let’s Shake

16. None
17. None

18. http://indiatoday.intoday.in/technology/story/apple-watch- handshakes-nfc-gestures/1/448093.html

19. None

20. lembrando rapidinho de protocolos delegates

21. protocol SomeProtocol { func someTypeMethod() }

22. protocol SomeProtocol { func someTypeMethod() } class SomeClass: SomeProtocol{ }

23. protocol WatchShakerDelegate { func watchShakerDidShake(_ watchShaker: WatchShaker) func watchShaker(_ watchShaker:WatchShaker,

    didFailWith error: Error) }

24. protocol WatchShakerDelegate { func didShake() func didFail(error: Error) }

25. protocol WatchShakerDelegate { func watchShakerDidShake(_ watchShaker: WatchShaker) func watchShaker(_ watchShaker:WatchShaker,

    didFailWith error: Error) }

26. class WatchShaker { public var delegate: WatchShakerDelegate? fileprivate var motionManager:

    CMMotionManager! fileprivate var lastShakeDate: Date? !// The threshold for how much acceleration needs to happen before an event will register. fileprivate var threshold:Double !// Time between shakes fileprivate var delay:Double = 0.1

27. init(shakeSensibility to:ShakeSensibility, delay time:Double) { self.threshold = to.rawValue self.delay =

    time self.motionManager = CMMotionManager() }

28. ShakeSensibility

29. enum ShakeSensibility: Double { case shakeSensibilitySoftest = 0.1 case shakeSensibilitySoft

    = 0.7 case shakeSensibilityNormal = 1.0 case shakeSensibilityHard = 1.2 case shakeSensibilityHardest = 2.0 }

30. public func start(delay accelerometerUpdateInterval:Double = 0.02) { guard motionManager.isAccelerometerAvailable else

    { return } motionManager.accelerometerUpdateInterval = accelerometerUpdateInterval let motionQueue = OperationQueue() motionManager.startAccelerometerUpdates(to: motionQueue) { (accelerometerData, err) -> Void in guard err == nil else { self.delegate?.watchShaker(self, didFailWith: err!) return }

31. guard let data = accelerometerData else { let e =

    NSError(domain: "No accelerometer data", code: 666, userInfo: ["No accelerometer data":"info"]) self.delegate?.watchShaker(self, didFailWith: e) return }

32. let valueX = fabs(data.acceleration.x) let valueY = fabs(data.acceleration.y) let maxValue

    = valueX > valueY ? valueX : valueY if maxValue > self.threshold { if let lastDate = self.lastShakeDate { if Date().compare(lastDate.addingTimeInterval(self.delay)) !== .orderedDescending { self.lastShakeDate = Date() self.delegate!?.watchShakerDidShake(self) } return } self.lastShakeDate = Date() self.delegate!?.watchShakerDidShake(self) }

33. :) @ezefranca

34. None
35. None

36. 3 vouchers para o curso de SpriteKit (100% em Swift

    ❤)