「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
3. ḪΔ͜ͱ ಥવͰ͕͢
4. ໿ 1೥൒
5. 2017 ೥ 3 ݄ ๭೔
6. ָউͰ͢Α✌✌ QRίʔυಡΈऔΔ ΞϓϦͭ͘ΕΔʁ
7. ͜ͷ࣌ߟ͍͑ͯͨ͜ͱ
8. AVFoundation Ͱ༨༟Ͱ͠ΐ • AVCaptureSession • AVCaptureMetadataOutput • AVMetadataMachineReadableCodeObject • etc…
9. QRίʔυ ౉͞Εͨ
10. https://www.55truck.com/shaken.html
11. https://www.55truck.com/shaken.html
13. "8/-/1/-/- /- /999999/02” "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09” "2/඼઒ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
14. http://mangalifewin.takeshobo.co.jp/rensai/popute3/
15. "8/-/1/-/- /- /999999/02” "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09” "2/඼઒ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
16. "2/- //160114/1001/BKG-NKR85AN/0168/- /- /0381/13/098/-/1/-/- /- /999999/02” "2/඼઒ɹɹ̔̌̌ͤ̒̐̎̒/1/NKR85-7011300/4JJ1/1”
17. φχϞϊ ͜Ε͸…
19. http://www.qrcode.com
21. ΋ͬͱ QRίʔυ Λ஌Ζ͏
22. ৘ใٕज़ʵࣗಈೝࣝٴͼσʔλऔಘٕज़ʵ ̧̦ίʔυόʔίʔυγϯϘϧମܥ࢓༷ JIS ن֨ X0510
23. http://www.jisc.go.jp/
24. શ 115 ϖʔδ…
25. QRίʔυͷ࢓૊Έ ௒μΠδΣετ൛
26. ࠇനϞδϡʔϧͷೝࣝ START ܕࣜ৘ใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
27. ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ
28. “Ϟʔυ” ղऍ ෮߸͢ΔͨΊʹॏཁͳͷ͕
29. “Ϟʔυ” ͱ͸
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࿈઀
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࿈઀
32. ߏ଄త࿈઀ Ϟʔυ
33. ϔομʔ࢓༷ 1. Ϟʔυࢦࣔࢠʢ0011ʣɿ4bit 2. γϯϘϧྻࢦࣔࢠɿ8bit 1. γϯϘϧҐஔɿ4bit 2. ࿈݁͞ΕΔγϯϘϧͷ߹ܭ਺ɿ4bit 3. ύϦςΟɿ8bit ෼ׂલͷσʔλΛόΠτ͝ͱʹXORԋࢉͨ͠஋
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.
36. ͦΜͳ΋ͷͳ͍ AVMetadataMachineReadableCodeObject ʹ
37. ࠇനϞδϡʔϧͷೝࣝ START ܕࣜ৘ใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
38. ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ AVMetadataMachine ReadableCodeObject ͷ stringValue ͸ ෳ߹ޙͷίϨ
39. ϥΠϒϥϦΛ୳͢ ߏ଄త࿈઀Λ͏·͘ѻ͑Δ
40. None Swift ੡ͷϥΠϒϥϦ
42. ZXingObjC ٹੈओ TheLevelUp/ZXingObjC: An Objective-C Port of ZXing
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
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 }
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)! … }
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 }
47. ղܾ ΍ͬͨʔʂʂ
48. ຊ౰ʹʁ
49. ZXingObjC ͷऑ఺ • ಡΈऔΓਫ਼౓͕͋·Γߴ͘ͳ͍ • AVFoundation ΍σϯιʔެࣜΞϓϦʹൺ΂Δͱ݁ߏ ͕͔͔࣌ؒΔ͜ͱ͕͋Δ • ։ൃ͕࣮࣭ࢭ·͍ͬͯΔ • Swift ʹஔ͖׵͍͑ͨͱ͔ॻ͔ΕͯΔ͚Ͳ͍ͭʹͳΔ ͔·ͬͨ͘Θ͔Βͳ͍
50. ઈ๬ ະདྷ͕ͳ͍
51. ઈ๬ ະདྷ͕ͳ͍ ʁ
52. ઈ๬ ະདྷ͕ͳ͍ ʁ 2017 ೥ ൒͹ ·Ͱͷ͓࿩
53. ࣌͸ྲྀΕ… 2018 ೥ 9 ݄ 1 ೔
54. iOS ͷόʔδϣϯγΣΞભҠ      ೥݄ ݄ ݄ ݄ ݄ ೥݄ ݄ ݄ ݄ iOS 11 iOS 10 iOS 9 or Earlier ※ 2018೥9݄͸༧ଌ
55. iOS 10 ͷαϙʔτ ͦΖͦΖ੾Ε·͢ΑͶʁ ࠓ݄͸ iOS 12 ͕ϦϦʔε͞Ε·͢
56. CIQRCodeDescriptor ਅͷٹੈओ in AVMetadataMachineReadableCodeObject
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.
58. CIQRCodeDescriptor ͱ͸
59. CIQRCodeDescriptor ͱ͸ • iOS 11 Ͱ௥Ճ͞ΕͨڧྗͳΫϥε • ந৅Ϋϥε CIBarcodeDescriptor ͷαϒΫϥε • QRίʔυΛੜ੒͢ΔͨΊʹඞཁे෼ͳσʔλΛ࣋ͭ • CIFilter Ͱ QRίʔυը૾Λੜ੒͢Δ͜ͱ΋Ͱ͖Δ
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) }
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.
62. ࠇനϞδϡʔϧͷೝࣝ START ܕࣜ৘ใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
63. ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ AVMetadataMachine ReadableCodeObject ͷ stringValue ͸ ෳ߹ޙͷίϨ
64. ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ errorCorrectedPayload ͸ ίίͷσʔλʂ
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.
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.
67. จࣈ਺ࢦࣔࢠͷϏοτ਺ ܕ൪
    TZNCPM7FSTJPO ਺ࣈ
    Ϟʔυ ӳ਺ࣈ
    Ϟʔυ ϏοτόΠτ
    Ϟʔυ ׽ࣈ
    Ϟʔυ ʙ     ʙ     ʙ    
68. symbolVersion + errorCorrectedPayload σίʔυͰ͖Δ
69. ͱ͍͏͜ͱ͸…ʁ
70. iOS 11 Ҏ߱ͷੈքͰ͸ 1. AVCaptureSession ͰಡΈऔΔ ߴਫ਼౓Ͱ଎͍
71. iOS 11 Ҏ߱ͷੈքͰ͸ AVMetadata Machine ReadableCode Object 2. CIQRCodeDescriptor #errorCorrectedPayload ΛऔΓग़͢ 1. AVCaptureSession ͰಡΈऔΔ
72. iOS 11 Ҏ߱ͷੈքͰ͸ AVMetadata Machine ReadableCode Object 2. CIQRCodeDescriptor #errorCorrectedPayload ΛऔΓग़͢ σίʔυ͢Δ 1. AVFoundation ͰಡΈऔΔ ͕Μ͹ͬͯ 3.
73. ղܾ ΍ͬͨʔʂʂࠓ౓ͦ͜
74. σίʔυ͢Δ ͕Μ͹ͬͯ 3. ͕Μ͹ͬͯ
75. ͕Μ͹Δ = ࣗલͰσίʔυॲཧΛॻ͘
76. ࣗલσίʔυͷํ਑ • શϞʔυʹରԠ͠Α͏ͱࢥͬͨΒʢͨͿΜʣ݁ߏେม… • ͱ͍͏͔σϯιʔެࣜΞϓϦ΋ରԠͯ͠ͳ͍ • ࠷௿ݶಡΈऔΓ͍ͨQRίʔυͷσίʔυॲཧͰଥڠ • ಠࣗΤϯίʔυ͞ΕͨQRίʔυ΋σίʔυͰ͖Δ͠ɺ ෯͕޿͕Δʢͱ͔ॻ͍ͯΔ͏ͪʹσϯιʔ͕Ԍ্͠·ͨ͠ʣ => https://srad.jp/submission/78134/
77. σίʔυͷҰྫ https://github.com/ monoqlo/QRCodeReader
78. ࣌ؒ͋Ε͹ গ͚ͩ͠ DEMO
79. ·ͱΊ
80. 0. iOS 10 ͷαϙʔτΛ੾ΔʢҰ൪େࣄʣ
81. ·ͱΊʢiOS 11 Ҏ߱ͷੈքʣ 1. AVCaptureSession ͰಡΈऔΔ AVMetadata Machine ReadableCode Object 2. CIQRCodeDescriptor #errorCorrectedPayload ΛऔΓग़͢ ͕Μ͹ͬͯσίʔυ͢Δ 3.
82. Appendix • Speaker Info @monoqlo • This Slide URL https://speakerdeck.com/monoqlo/iosdc-2018