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

#2 Swift Meetup SP

https://github.com/ezefranca/WatchShaker

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
5. Swift Meetup SP ❤
6. Heurísticas?
14. http://mathwiki.cs.ut.ee/asymptotics/05_polynomial_complexity
15. Let’s Shake
18. http://indiatoday.intoday.in/technology/story/apple-watch- handshakes-nfc-gestures/1/448093.html
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
36. 3 vouchers para o curso de SpriteKit (100% em Swift ❤)