CoreMotionを使って気づいたこととiOS11での新機能

#potatotips

potatotips #42 (iOS/Android開発Tips共有会) - connpass
https://potatotips.connpass.com/event/60015/

Transcript

1. CoreMotionΛ
   ࢖ͬͯؾ͍ͮͨ͜ͱͱ
   iOS11Ͱͷ৽ػೳ
   ాத ୡ໵ (@tattn)
   

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2. • Yahoo!৐׵Ҋ಺
   • iOSΞϓϦΤϯδχΞ
   • 2016೥৽ଔ
   • GitHub: @tattn
   • Qiita: @tattn
   • Twitter: @tanakasan2525
   ాத ୡ໵ (@tattn)
   

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3. CoreMotionΛ
   ͕ͬͭΓ৮ͬͯΈ·ͨ͠
   

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4. CoreMotion
   

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5. CoreMotion
   ୺຤ͷ܏͖΍า਺ͳͲɺσόΠεͷಈ͖΍ͦΕ͔Β෼
   ͔Δਓͷಈ͖ͳͲΛऔಘͰ͖ΔϑϨʔϜϫʔΫɻ
   iOS 4͔Βఏڙ͞Ε͍ͯΔɻ

   (iOS 4 Ҏલ͸ UIAccelerometer ͱ͍͏ΫϥεͰՃ଎౓Λऔಘ͍ͯͨ͠)
   Sensing Device Motion in iOS 4
   https://developer.apple.com/videos/play/wwdc2010/423/
   

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6. CoreMotion
   iPhone 5sҎ߱ʹ౥ࡌͷ

   ίϓϩηοα (M7Ҏ߱) Ͱେ෯ػೳڧԽ
   What's New in Core Motion
   https://developer.apple.com/videos/play/wwdc2015/705/
   ←Ճ଎౓ηϯα
   ←δϟΠϩηϯα
   ←࣓ؾηϯα
   ←ߴ౓ηϯα
   

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7. ۩ମతʹͰ͖Δ͜ͱ
   

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8. ଌఆͰ͖Δ͜ͱͷ͢΂ͯ
   Ճ଎౓ηϯα
   δϟΠϩηϯα
   ࣓ؾηϯα
   ߴ౓ηϯα
   • ୺຤ͷ޲͖ (ճస)
   • (୺຤ʹର͢Δ)ॏྗͷํ޲
   • ୺຤ͷՃ଎౓(ॏྗແࢹ)
   • ֤ํ޲ͷ࣓ଋີ౓
   • า਺
   • า͍ͨڑ཭ (ਪఆ)
   • ฏۉ/ݱࡏͷา͘଎͞ [m/s]
   • Ұඵؒͷา਺ [า਺/s]
   • า͍ͯొͬͨ֊਺ (ਪఆ)
   • (ଌఆ͔ͯ͠Βͷ)૬ରߴ౓
   • ؾѹ
   • ׆ಈঢ়ଶ 

   (ఀࢭ/ెา/૸Δ/ࣗಈं/

   ࣗసं)
   

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9. ࢖͍ํ
   

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10. جຊతͳ࢖͍ํ
    1. ηϯαʔͷ஋औಘ։࢝
    2. ஋Λఆظతʹऔಘ(ΫϩʔδϟorϓϩύςΟ)
    ύλʔϯ1
    ύλʔϯ2
    1. ظؒΛࢦఆ
    2. ظؒதʹଌఆͨ͠σʔλΛऔಘ
    

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11. ύλʔϯ1 - ఆظऔಘ
    CMMotionManager().startDeviceMotionUpdates()
    CMMotionManager().startAccelerometerUpdates()
    CMMotionManager().startGyroUpdates()
    CMMotionManager().startMagnetometerUpdates()
    CMPedometer().startUpdates()
    CMPedometer().startEventUpdates()
    CMAltimeter().startRelativeAltitudeUpdates()
    CMMotionActivityManager().startActivityUpdates()
    ෼͔Γ΍͍͢☺औಘ։࢝ϝιου
    

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12. ύλʔϯ1 - ఆظऔಘ
    manager.deviceMotion?.rotationRate
    motionActivityManager.startActivityUpdates(to: .init()) { activity in
    guard let activity = activity else { return }
    if activity.stationary {
    print("ࢭ·ͬͯΔΑ")
    }
    if activity.cycling {
    print("νϟϦͰདྷͨ")
    }
    }
    ෼͔Γ΍͍͢☺औಘํ๏
    

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13. ύλʔϯ2 - ظؒͰऔಘ
    let now = Date()
    let dayBeforeYesterDay = now.addingTimeInterval(-60 * 60 * 24 * 2)
    pedometer.queryPedometerData(from: dayBeforeYesterDay,
    to: now) { data, error in
    guard let data = data, error == nil else { return }
    print(data.distance ?? 0)
    print(data.numberOfSteps)
    print(data.floorsAscended ?? 0)
    }
    ෼͔Γ΍͍͢☺औಘํ๏
    

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14. ࢖ͬͯΈͯؾ͍ͮͨ͜ͱ
    

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15. ѹ౗త৘ใྔͷগͳ͞
    ϓϩύςΟ໊Ͱݕࡧͯ͠΋
    177݅
    (2017/7/25࣌఺)
    

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16. ༷ʑͳଌఆํ๏͕͋Δ
    

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17. ༷ʑͳଌఆํ๏͕͋Δ
    xArbitraryZVertical
    Z͕࣠ਨ௚ɺX͕࣠ฏ໘ͷ೚ҙํ޲
    xArbitraryCorrectedZVertical
    ࣓ؾηϯαͰyawͷਫ਼౓͕޲্ͨ͠xArbitraryZVertical

    CPU࢖༻཰্͕͕Δ
    xMagneticNorthZVertical
    Z͕࣠ਨ௚ɺX͕࣓࣠๺

    ୺຤Λಈ͔࣓ͯ͠ؾηϯαͷΩϟϦϒϨʔγϣϯ͕ඞཁ
    xTrueNorthZVertical
    Z͕࣠ਨ௚ɺX͕࣠ਅ๺

    ࣓๺ͱਅ๺ͷܭࢉʹ࣓ؾηϯαͱGPSΛ࢖༻
    

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18. ༷ʑͳଌఆํ๏͕͋Δ
    xArbitraryCorrectedZVertical
    ࣓ؾηϯαͰyawͷਫ਼౓͕޲্ͨ͠xArbitraryZVertical

    CPU࢖༻཰্͕͕Δ
    xTrueNorthZVertical
    Z͕࣠ਨ௚ɺX͕࣠ਅ๺

    ࣓๺ͱਅ๺ͷܭࢉʹ࣓ؾηϯαͱGPSΛ࢖༻
    ࣮͸࣓ؾηϯαΛ࢖༻

    (໊લ͔Β͸Θ͔Γʹ͍͘)
    ࣮͸GPSΛ࢖༻

    (GPSͷڐՄΞϥʔτग़ͳ͍ & 

    Ґஔ৘ใαʔϏεͷON͕ඞਢ)
    

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19. υΩϡϝϯτ͕ͨ·ʹࡶ
    վߦ
    https://developer.apple.com/documentation/coremotion/getting_processed_device_motion_data
    

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20. I/F͕ͨ·ʹ΍Δؾͳ͍
    @available(iOS 9.0, *)
    open class CMSensorDataList : NSObject, NSFastEnumeration {
    }
    Swift͔Β࢖͍ʹ͍͘
    protocol NSFastEnumeration {
    func countByEnumerating(
    with state: UnsafeMutablePointer,
    objects buffer: AutoreleasingUnsafeMutablePointer!,
    count len: Int) -> Int
    }
    

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21. I/F͕ͨ·ʹ΍Δؾͳ͍
    @available(iOS 9.0, *)
    open class CMSensorDataList : NSObject, NSFastEnumeration {
    }
    extension CMSensorDataList: Sequence {
    public func makeIterator() -> NSFastEnumerationIterator {
    return NSFastEnumerationIterator(self)
    }
    }
    Tips: ΍ΔؾΛ࣮૷
    ͍ͭ΋ͷ
    for-in, map
    ͳͲ
    
    

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22. iOS 11Ͱͷ৽ػೳ
    https://developer.apple.com/videos/play/wwdc2017/704/
    

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23. ڐՄঢ়ଶΛࣄલʹऔಘՄೳʹ
    ࠓ·Ͱ
    iOS 11͔Β
    pedometer.queryPedometerData(from: now, to: now) { (data, error) in
    if let code = error?._code,
    code == Int(CMErrorMotionActivityNotAuthorized.rawValue) {
    // ະڐՄ
    }
    if CMPedometer.isStepCountingAvailable() {
    switch CMPedometer.authorizationStatus() {
    case .notDetermined:
    break
    case .restricted:
    break
    case .denied:
    break
    case .authorized:
    break
    }
    }
    

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24. ίϯύεͷ஋ΛऔಘՄೳʹ
    ๺ʹରͯ͠ͲΕ͚ͩճస͍ͯ͠Δ͔Λ
    0.0° ʙ 360.0 ° ͰऔಘՄೳ
    Heading
    

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25. Ճ଎౓ͷه࿥͕Մೳʹ (7/7+ on iOS11)
    CMSensorRecoder
    • ه࿥࣌ؒΛࢦఆͯ͠ه࿥։࢝ (࠷େ36h)
    • όοΫάϥ΢ϯυͰ50HzͰܭଌ (ΞϓϦΛऴྃͯ͠΋)
    • ࠷େ3೔ؒͷه࿥ΛऔಘՄೳ
    • ࠶౓ه࿥Λ։࢝ͨ͠Γ

    ଞͷΞϓϦ͕ه࿥Λ։࢝͢Δͱ࣌ؒΛԆ௕Մೳ
    

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26. Ճ଎౓ͷه࿥͕Մೳʹ (7/7+ on iOS11)
    CMSensorRecoder
    • Apple Watch
    • Apple Watch Series 1
    • Apple Watch Series 2
    • iPhone 7/7 Plus (iOS 11)
    ॳΊͯiPhoneͰ࢖༻Մೳʹ
    

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27. (´ɾωɾʆ)
    iOS11Ͱͷ৽ػೳΛௐ΂ऴΘͬͨ࣌ͷإ
    

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28. ࠷ޙʹ
    

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29. ࠷ޙʹ
    https://github.com/tattn/TryCoreMotion
    ΄΅શػೳ࢖ͬͨαϯϓϧΞϓϦ࡞Γ·ͨ͠
    

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30. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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