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[#2 Swift Meetup SP - 2017] Heurísticas e Swif...
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Ezequiel dos Santos
May 17, 2017
Technology
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[#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
Ezequiel dos Santos
May 17, 2017
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Transcript
Swift Meetup SP Heurísticas e Swift: Do “NSProcessInfo” a um
shake no Apple Watch Ezequiel França
Mecatrônica @ SENAI Automação Industrial @ IFSP Analise de Sistemas
@ FIAP Desenvolvedor iOS, Maker e open-source hacker. Ezequiel França
https://www.youtube.com/watch?v=BoeRfMBVCGo
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Swift Meetup SP ❤
Heurísticas?
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http://mathwiki.cs.ut.ee/asymptotics/05_polynomial_complexity
Let’s Shake
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http://indiatoday.intoday.in/technology/story/apple-watch- handshakes-nfc-gestures/1/448093.html
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lembrando rapidinho de protocolos delegates
protocol SomeProtocol { func someTypeMethod() }
protocol SomeProtocol { func someTypeMethod() } class SomeClass: SomeProtocol{ }
protocol WatchShakerDelegate { func watchShakerDidShake(_ watchShaker: WatchShaker) func watchShaker(_ watchShaker:WatchShaker,
didFailWith error: Error) }
protocol WatchShakerDelegate { func didShake() func didFail(error: Error) }
protocol WatchShakerDelegate { func watchShakerDidShake(_ watchShaker: WatchShaker) func watchShaker(_ watchShaker:WatchShaker,
didFailWith error: Error) }
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
init(shakeSensibility to:ShakeSensibility, delay time:Double) { self.threshold = to.rawValue self.delay =
time self.motionManager = CMMotionManager() }
ShakeSensibility
enum ShakeSensibility: Double { case shakeSensibilitySoftest = 0.1 case shakeSensibilitySoft
= 0.7 case shakeSensibilityNormal = 1.0 case shakeSensibilityHard = 1.2 case shakeSensibilityHardest = 2.0 }
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 }
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 }
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) }
:) @ezefranca
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3 vouchers para o curso de SpriteKit (100% em Swift
❤)