「QRコード読み取り？楽勝ですよ😙」=>「AVFoundationを信じたおれがバカだった😇」 / iOSDC 2018

iOSDC 2018 2018/09/01 14:40〜 Track B レギュラートーク（15分）

Transcript

1. @monoqlo
   QRίʔυಡΈऔΓʁ
   ָউͰ͢Α
   AVFoundationΛ৴ͨ͡
   ͓Ε͕όΧͩͬͨ
   

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2. View Slide

3. ḪΔ͜ͱ
   ಥવͰ͕͢
   

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4. ໿
   1೥൒
   

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5. 2017 ೥ 3 ݄ ๭೔
   

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6. ָউͰ͢Α✌✌
   QRίʔυಡΈऔΔ
   ΞϓϦͭ͘ΕΔʁ
   

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7. ͜ͷ࣌ߟ͍͑ͯͨ͜ͱ
   

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8. AVFoundation Ͱ༨༟Ͱ͠ΐ
   • AVCaptureSession
   • AVCaptureMetadataOutput
   • AVMetadataMachineReadableCodeObject
   • etc…
   

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9. QRίʔυ
   ౉͞Εͨ
   

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10. https://www.55truck.com/shaken.html
    

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11. https://www.55truck.com/shaken.html
    

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12. View Slide

13. "8/-/1/-/- /- /999999/02”
    "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09”
    "2/඼઒ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
    

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14. http://mangalifewin.takeshobo.co.jp/rensai/popute3/
    

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15. "8/-/1/-/- /- /999999/02”
    "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09”
    "2/඼઒ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
    

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16. "2/- //160114/1001/BKG-NKR85AN/0168/- /- /0381/13/098/-/1/-/- /- /999999/02”
    "2/඼઒ɹɹ̔̌̌ͤ̒̐̎̒/1/NKR85-7011300/4JJ1/1”
    

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17. φχϞϊ
    ͜Ε͸…
    

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18. View Slide

19. http://www.qrcode.com
    

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20. View Slide

21. ΋ͬͱ QRίʔυ Λ஌Ζ͏
    

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22. ৘ใٕज़ʵࣗಈೝࣝٴͼσʔλऔಘٕज़ʵ
    ̧̦ίʔυόʔίʔυγϯϘϧମܥ࢓༷
    JIS ن֨ X0510
    

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23. http://www.jisc.go.jp/
    

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24. શ
    115 ϖʔδ…
    

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25. QRίʔυͷ࢓૊Έ
    ௒μΠδΣετ൛
    

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26. ࠇനϞδϡʔϧͷೝࣝ
    START
    ܕࣜ৘ใͷ෮߸
    ܕ൪ͷܾఆ
    ϚεΫॲཧͷղআ
    σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
    

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27. ޡΓగਖ਼
    ޡΓݕग़
    σʔλΛ෮߸
    σʔλೖख
    END
    ޡΓφγ
    ޡΓΞϦ
    

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28. “Ϟʔυ” ղऍ
    ෮߸͢ΔͨΊʹॏཁͳͷ͕
    

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29. “Ϟʔυ” ͱ͸
    

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30. • ECI
    • ߏ଄త࿈઀
    • FNC1
    • (ऴ୺ύλʔϯ)
    • ਺ࣈ
    • ӳ਺ࣈ
    • 8ϏοτόΠτ
    • ׽ࣈ
    Ϟʔυ = σʔλΛ֨ೲ͢Δܗࣜ
    • ѹॖޮ཰޲্Λ໨తͱ͠ɺଟ਺ͷϞʔυ͕ఆٛ͞Ε͍ͯΔ
    • QRίʔυੜ੒࣌ɺσʔλʹ߹Θͤͯ࠷దͳ΋ͷΛબ୒͢Δ
    • ϔομʔͱͯ͠จࣈ਺ࢦࣔࢠͱͱ΋ʹσʔλʹ෇Ճ͢Δ
    • ૊Έ߹Θͤͯ࢖༻Մʢex. ӳ਺ࣈ + ׽ࣈʣ
    ߏ଄త࿈઀
    

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31. • ਺ࣈ
    • ӳ਺ࣈ
    • 8ϏοτόΠτ
    • ׽ࣈ
    • ECI
    • ߏ଄త࿈઀
    • FNC1
    • (ऴ୺ύλʔϯ)
    Ϟʔυ = σʔλΛ֨ೲ͢Δܗࣜ
    • ѹॖޮ཰޲্Λ໨తͱ͠ɺଟ਺ͷϞʔυ͕ఆٛ͞Ε͍ͯΔ
    • QRίʔυੜ੒࣌ɺσʔλʹ߹Θͤͯ࠷దͳ΋ͷΛબ୒͢Δ
    • ϔομʔͱͯ͠จࣈ਺ࢦࣔࢠͱͱ΋ʹσʔλʹ෇Ճ͢Δ
    • ૊Έ߹Θͤͯ࢖༻Մʢex. ӳ਺ࣈ + ׽ࣈʣ
    ߏ଄త࿈઀
    

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32. ߏ଄త࿈઀
    Ϟʔυ
    

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33. ϔομʔ࢓༷
    1. Ϟʔυࢦࣔࢠʢ0011ʣɿ4bit
    2. γϯϘϧྻࢦࣔࢠɿ8bit
    1. γϯϘϧҐஔɿ4bit
    2. ࿈݁͞ΕΔγϯϘϧͷ߹ܭ਺ɿ4bit
    3. ύϦςΟɿ8bit
    ෼ׂલͷσʔλΛόΠτ͝ͱʹXORԋࢉͨ͠஋
    

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34. View Slide

35. ϓϩύςΟ
    var corners: [CGPoint]
    A Swift array of corner points.
    var stringValue: String?
    Returns the error corrected
    data decoded into a human-
    readable string.
    

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36. ͦΜͳ΋ͷͳ͍
    AVMetadataMachineReadableCodeObject ʹ
    

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37. ࠇനϞδϡʔϧͷೝࣝ
    START
    ܕࣜ৘ใͷ෮߸
    ܕ൪ͷܾఆ
    ϚεΫॲཧͷղআ
    σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
    

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38. ޡΓగਖ਼
    ޡΓݕग़
    σʔλΛ෮߸
    σʔλೖख
    END
    ޡΓφγ
    ޡΓΞϦ
    AVMetadataMachine
    ReadableCodeObject
    ͷ stringValue ͸
    ෳ߹ޙͷίϨ
    

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39. ϥΠϒϥϦΛ୳͢
    ߏ଄త࿈઀Λ͏·͘ѻ͑Δ
    

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40. 
    None
    Swift ੡ͷϥΠϒϥϦ
    

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41. View Slide

42. ZXingObjC
    ٹੈओ
    TheLevelUp/ZXingObjC: An Objective-C Port of ZXing
    

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43. γϯϘϧҐஔ/߹ܭ਺ͱύϦςΟ͕औΕΔ
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    

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44. γϯϘϧҐஔ/߹ܭ਺ͱύϦςΟ͕औΕΔ
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    

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45. γϯϘϧҐஔ/߹ܭ਺ͱύϦςΟ͕औΕΔ
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    

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46. γϯϘϧҐஔ/߹ܭ਺ͱύϦςΟ͕औΕΔ
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) {
    guard let _ = result else { return }
    // ෼ׂQRίʔυͷ৔߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠
    // Ͳͷ෦෼ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔൑ఆ͢Δ͜ͱ͕Ͱ͖Δ
    // - kResultMetadataTypeStructuredAppendSequence
    // - kResultMetadataTypeStructuredAppendParity
    // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ਺ 4bit
    let bit = String(sequenceValue, radix: 2)
    let pad = String(repeating: "0", count: (8 - bit.count))
    let sequence = pad + bit
    let current = Int(sequence.prefix(4), radix: 2)!
    let total = Int(sequence.suffix(from: 4), radix: 2)!
    …
    }
    guard let metaData = result.resultMetadata,
    let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int,
    let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int
    else { return }
    

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47. ղܾ
    ΍ͬͨʔʂʂ
    

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48. ຊ౰ʹʁ
    

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49. ZXingObjC ͷऑ఺
    • ಡΈऔΓਫ਼౓͕͋·Γߴ͘ͳ͍
    • AVFoundation ΍σϯιʔެࣜΞϓϦʹൺ΂Δͱ݁ߏ
    ͕͔͔࣌ؒΔ͜ͱ͕͋Δ
    • ։ൃ͕࣮࣭ࢭ·͍ͬͯΔ
    • Swift ʹஔ͖׵͍͑ͨͱ͔ॻ͔ΕͯΔ͚Ͳ͍ͭʹͳΔ
    ͔·ͬͨ͘Θ͔Βͳ͍
    

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50. ઈ๬
    ະདྷ͕ͳ͍
    

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51. ઈ๬
    ະདྷ͕ͳ͍
    ʁ
    

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52. ઈ๬
    ະདྷ͕ͳ͍
    ʁ
    2017 ೥ ൒͹
    ·Ͱͷ͓࿩
    

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53. ࣌͸ྲྀΕ…
    2018 ೥ 9 ݄ 1 ೔
    

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54. iOS ͷόʔδϣϯγΣΞભҠ
    
    
    
    
    
    ೥݄ ݄ ݄ ݄ ݄ ೥݄ ݄ ݄ ݄
    iOS 11
    iOS 10
    iOS 9 or
    Earlier
    ※ 2018೥9݄͸༧ଌ
    

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55. iOS 10 ͷαϙʔτ
    ͦΖͦΖ੾Ε·͢ΑͶʁ
    ࠓ݄͸ iOS 12 ͕ϦϦʔε͞Ε·͢
    

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56. CIQRCodeDescriptor
    ਅͷٹੈओ
    in AVMetadataMachineReadableCodeObject
    

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57. ϓϩύςΟ
    var corners: [CGPoint]
    A Swift array of corner points.
    var stringValue: String?
    Returns the error corrected
    data decoded into a human-
    readable string.
    var descriptor:
    CIBarcodeDescriptor?
    A barcode description for use
    in Core Image.
    

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58. CIQRCodeDescriptor ͱ͸
    

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59. CIQRCodeDescriptor ͱ͸
    • iOS 11 Ͱ௥Ճ͞ΕͨڧྗͳΫϥε
    • ந৅Ϋϥε CIBarcodeDescriptor ͷαϒΫϥε
    • QRίʔυΛੜ੒͢ΔͨΊʹඞཁे෼ͳσʔλΛ࣋ͭ
    • CIFilter Ͱ QRίʔυը૾Λੜ੒͢Δ͜ͱ΋Ͱ͖Δ
    

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60. CIQRCodeDescriptor ͱ͸
    • iOS 11 Ͱ௥Ճ͞ΕͨڧྗͳΫϥε
    • ந৅Ϋϥε CIBarcodeDescriptor ͷαϒΫϥε
    • CIFilter Ͱ QRίʔυը૾Λੜ੒͢Δ͜ͱ΋Ͱ͖Δ
    func generateQRCodeImage(from descriptor: CIQRCodeDescriptor) -> UIImage? {
    let inputParams: [String: Any] = ["inputBarcodeDescriptor": descriptor]
    let barcodeCreationFilter = CIFilter(name: "CIBarcodeGenerator",
    parameters: inputParams)
    guard let outputImage = barcodeCreationFilter?.outputImage,
    let cgImage = CIContext().createCGImage(outputImage, from:
    outputImage.extent) else {
    return nil
    }
    return UIImage(cgImage: cgImage)
    }
    

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61. େࣄͳͷ͸͜ͷ 2 ͭ
    var errorCorrectedPayload: Data
    The error-corrected payload containing the
    data encoded in the QR code.
    var symbolVersion: Int
    The version of the QR code.
    

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62. ࠇനϞδϡʔϧͷೝࣝ
    START
    ܕࣜ৘ใͷ෮߸
    ܕ൪ͷܾఆ
    ϚεΫॲཧͷղআ
    σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
    

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63. ޡΓగਖ਼
    ޡΓݕग़
    σʔλΛ෮߸
    σʔλೖख
    END
    ޡΓφγ
    ޡΓΞϦ
    AVMetadataMachine
    ReadableCodeObject
    ͷ stringValue ͸
    ෳ߹ޙͷίϨ
    

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64. ޡΓగਖ਼
    ޡΓݕग़
    σʔλΛ෮߸
    σʔλೖख
    END
    ޡΓφγ
    ޡΓΞϦ
    errorCorrectedPayload ͸
    ίίͷσʔλʂ
    

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65. େࣄͳͷ͸͜ͷ 2 ͭ
    var errorCorrectedPayload: Data
    The error-corrected payload containing the
    data encoded in the QR code.
    var symbolVersion: Int
    The version of the QR code.
    

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66. େࣄͳͷ͸͜ͷ 2 ͭ
    var errorCorrectedPayload: Data
    The error-corrected payload containing the
    data encoded in the QR code.
    var symbolVersion: Int
    The version of the QR code.
    
    

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67. จࣈ਺ࢦࣔࢠͷϏοτ਺
    ܕ൪
    TZNCPM7FSTJPO
    ਺ࣈ
    Ϟʔυ
    ӳ਺ࣈ
    Ϟʔυ
    ϏοτόΠτ
    Ϟʔυ
    ׽ࣈ
    Ϟʔυ
    ʙ
    ʙ
    ʙ
    

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68. symbolVersion
    +
    errorCorrectedPayload
    σίʔυͰ͖Δ
    

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69. ͱ͍͏͜ͱ͸…ʁ
    

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70. iOS 11 Ҏ߱ͷੈքͰ͸
    1. AVCaptureSession
    ͰಡΈऔΔ
    ߴਫ਼౓Ͱ଎͍
    

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71. iOS 11 Ҏ߱ͷੈքͰ͸
    AVMetadata
    Machine
    ReadableCode
    Object
    2. CIQRCodeDescriptor
    #errorCorrectedPayload
    ΛऔΓग़͢
    1. AVCaptureSession
    ͰಡΈऔΔ
    

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72. iOS 11 Ҏ߱ͷੈքͰ͸
    AVMetadata
    Machine
    ReadableCode
    Object
    2. CIQRCodeDescriptor
    #errorCorrectedPayload
    ΛऔΓग़͢ σίʔυ͢Δ
    1. AVFoundation
    ͰಡΈऔΔ ͕Μ͹ͬͯ
    3.
    

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73. ղܾ
    ΍ͬͨʔʂʂࠓ౓ͦ͜
    

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74. σίʔυ͢Δ
    ͕Μ͹ͬͯ
    3.
    ͕Μ͹ͬͯ
    

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75. ͕Μ͹Δ = ࣗલͰσίʔυॲཧΛॻ͘
    

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76. ࣗલσίʔυͷํ਑
    • શϞʔυʹରԠ͠Α͏ͱࢥͬͨΒʢͨͿΜʣ݁ߏେม…
    • ͱ͍͏͔σϯιʔެࣜΞϓϦ΋ରԠͯ͠ͳ͍
    • ࠷௿ݶಡΈऔΓ͍ͨQRίʔυͷσίʔυॲཧͰଥڠ
    • ಠࣗΤϯίʔυ͞ΕͨQRίʔυ΋σίʔυͰ͖Δ͠ɺ
    ෯͕޿͕Δʢͱ͔ॻ͍ͯΔ͏ͪʹσϯιʔ͕Ԍ্͠·ͨ͠ʣ
    => https://srad.jp/submission/78134/
    

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77. σίʔυͷҰྫ
    https://github.com/
    monoqlo/QRCodeReader
    

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78. ࣌ؒ͋Ε͹
    গ͚ͩ͠ DEMO
    

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79. ·ͱΊ
    

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80. 
    
    0. iOS 10 ͷαϙʔτΛ੾ΔʢҰ൪େࣄʣ
    

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81. ·ͱΊʢiOS 11 Ҏ߱ͷੈքʣ
    1. AVCaptureSession
    ͰಡΈऔΔ
    AVMetadata
    Machine
    ReadableCode
    Object
    2. CIQRCodeDescriptor
    #errorCorrectedPayload
    ΛऔΓग़͢
    ͕Μ͹ͬͯσίʔυ͢Δ
    3.
    

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82. Appendix
    • Speaker Info
    @monoqlo
    • This Slide URL
    https://speakerdeck.com/monoqlo/iosdc-2018
    

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