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Handling rich text in Swift

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Avatar for Kishikawa Katsumi Kishikawa Katsumi
August 20, 2016
Programming
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Handling rich text in Swift

Handling rich text
in Swift
iOSDC Japan 2016

Avatar for Kishikawa Katsumi

Kishikawa Katsumi

August 20, 2016
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Transcript

  1. Handling rich text in Swift iOSDC Japan 2016 Katsumi Kishikawa

    [email protected]

  2. Katsumi Kishikawa Realm Inc. [email protected]

  3. [email protected]

  4. [email protected]

  5. [email protected]

  6. [email protected]

  7. Agenda ˖ J04ךذؗأزٖ؎،ؐزחאְג ˖ ة؎هؚٓؿ؍ך㛇燉 ˖ 5FYU,JUך㛇燉ה䘔欽 [email protected]

  8. iOS 7Ҏ߱ͷςΩετϨΠΞ΢τ [email protected]

  9. TextKit [email protected]

  10. TextKitͱ͸ ˖ 넝鸞זٌتٝذؗأزٖ؎،ؐز٥ٖٝت ؚٔٝؒٝآٝ ˖ $PSF5FYUד⡲׵׸גְ׷ ˖ 6*,JUהך窟さ [email protected] https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/CustomTextProcessing/CustomTextProcessing.html

  11. UILabel [email protected]

  12. [email protected] UILabelΛී௨ʹ࢖͏

  13. [email protected] ώϥΪϊͱγεςϜϑΥϯτ UIFont(name: "HiraginoSans-W3", size: 32) UIFont.systemFontOfSize(32)

  14. [email protected] ώϥΪϊͱγεςϜϑΥϯτ

  15. [email protected] ώϥΪϊͱγεςϜϑΥϯτ

  16. [email protected] General Header

  17. [email protected] ΞϧϑΝϕοτΛؚ·ͳ͍৔߹

  18. ߦͷߴ͞͸ԿͰܾ·Δ͔ [email protected]

  19. [email protected] Font metrics https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/FontHandling/FontHandling.html

  20. [email protected] Font metrics https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/FontHandling/FontHandling.html

  21. [email protected] Font metrics

  22. [email protected] Font metrics Baseline X-Height Cap height Ascent Descent

  23. [email protected] ώϥΪϊ͸ಛघͳϝτϦΫεΛ࣋ͭ

  24. [email protected] ʢࢀߟʣNoto Sans CJK JP

  25. let label = UILabel(frame: view.bounds) label.backgroundColor = ... label.textColor =

    ... label.font = ... label.text = text ... label.sizeToFit() label.frame.size.height += ceil(abs(label.font.descender * 2)) [email protected] ্ԼʹDescentΛิ͏

  26. [email protected] ্ԼʹDescentΛิ͏

  27. [email protected] ্ԼʹDescentΛิ͏

  28. [email protected] ΦϦδφϧͱൺֱ

  29. • ώϥΪϊΛ໌ࣔతʹࢦఆ͠ͳ͍ • γεςϜϑΥϯτΛ࢖͏ • σβΠϯࢦࣔॻͳͲͰɺώϥΪϊ͸͍͍ͨͯγε ςϜϑΥϯτΛҙਤ͍ͯ͠Δ͸ͣ • தࠃޠ༻ϑΥϯτʹϑΥʔϧόοΫͨ͘͠ͳ͍Մ ೳੑ

    • ώϥΪϊΛࢦఆ͢Δ৔߹ɺΞϧϑΝϕοτʹؾΛ ͚ͭΔ [email protected] ώϥΪϊͷϝτϦΫεʹ஫ҙ

  30. [email protected] Tips: ೔ຊޠϑΥϯτʹϑΥʔϧόοΫͤ͞Δ let attributes = [ NSFontAttributeName: font, kCTLanguageAttributeName

    as String: "ja", ... ]

  31. αΠζͷܭࢉ [email protected]

  32. let size = CGSize(width: label.bounds.width, height: CGFloat.max) let boundingRect =

    NSString(string: text).boundingRectWithSize(size, options: [.UsesLineFragmentOrigin], attributes: [NSFontAttributeName: font], context: nil) [email protected] ඳըαΠζΛಘΔ

  33. [email protected] ඳըαΠζΛಘΔ

  34. UITextView [email protected]

  35. [email protected] UITextViewΛී௨ʹ࢖͏

  36. [email protected] UITextViewΛී௨ʹ࢖͏ UIFont(name: "HiraginoSans-W3", size: 32) UIFont.systemFontOfSize(32)

  37. [email protected] ඳըαΠζ

  38. [email protected] ඳըαΠζ

  39. [email protected] σϑΥϧτͷϚʔδϯ

  40. σϑΥϧτͷϚʔδϯ textView.textContainer.lineFragmentPadding textView.textContainerInset UIEdgeInsets(top: 8.0, left: 0.0, bottom: 8.0, right:

    0.0) 5.0 [email protected]

  41. [email protected] ώϥΪϊΛࢦఆͨ͠৔߹ font.leading

  42. σϑΥϧτͷελΠϧΛϦηοτ͢Δ [email protected]

  43. let textView = UITextView(frame: view.bounds) ... textView.textContainerInset = UIEdgeInsetsZero textView.sizeToFit()

    [email protected] textContainerInsetΛऔΓআ͘

  44. let textView = UITextView(frame: view.bounds) ... textView.textContainerInset = UIEdgeInsetsZero textView.sizeToFit()

    [email protected] textContainerInsetΛऔΓআ͘

  45. [email protected] textContainerInsetΛऔΓআ͘

  46. let textView = UITextView(frame: view.bounds) ... textView.textContainer.lineFragmentPadding = 0 textView.sizeToFit()

    [email protected] lineFragmentPaddingΛऔΓআ͘

  47. let textView = UITextView(frame: view.bounds) ... textView.textContainer.lineFragmentPadding = 0 textView.sizeToFit()

    [email protected] lineFragmentPaddingΛऔΓআ͘

  48. [email protected] lineFragmentPaddingΛऔΓআ͘

  49. let size = CGSize(width: textView.bounds.width, height: CGFloat.max) let boundingRect =

    NSString(string: text).boundingRectWithSize(size, options: [.UsesLineFragmentOrigin], attributes: [NSFontAttributeName: font], context: nil) [email protected] ඳըαΠζΛಘΔ

  50. [email protected] ඳըαΠζΛಘΔ

  51. let textView = UITextView(frame: view.bounds) ... textView.layoutManager.usesFontLeading = false textView.sizeToFit()

    [email protected] font.leadingΛऔΓআ͘

  52. let textView = UITextView(frame: view.bounds) ... textView.layoutManager.usesFontLeading = false textView.sizeToFit()

    [email protected] font.leadingΛऔΓআ͘

  53. [email protected] font.leadingΛऔΓআ͘

  54. let size = CGSize(width: textView.bounds.width, height: CGFloat.max) let boundingRect =

    NSString(string: text).boundingRectWithSize(size, options: [.UsesLineFragmentOrigin, .UsesFontLeading], attributes: [NSFontAttributeName: font], context: nil) [email protected] ʢผղʣfont.leadingΛؚΊͯܭࢉ͢Δ

  55. [email protected] ʢผղʣfont.leadingΛؚΊͯܭࢉ͢Δ

  56. [email protected] ʢผղʣfont.leadingΛؚΊͯܭࢉ͢Δ

  57. [email protected] textView.textContainerInset = UIEdgeInsetsZero textView.textContainer.lineFragmentPadding = 0 textView.layoutManager.usesFontLeading = false

    σϑΥϧτελΠϧͷϦηοτ

  58. ͞·͟·ͳελΠϧʹରԠ͢Δ [email protected]

  59. [email protected] ߦؒͷมߋ

  60. NSAttributedString [email protected]

  61. NSParagraphStyle [email protected]

  62. let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.minimumLineHeight = ceil(font.lineHeight) paragraphStyle.maximumLineHeight = ceil(font.lineHeight)

    paragraphStyle.lineSpacing = 8 let attributes = [ NSFontAttributeName: font, NSForegroundColorAttributeName: UIColor(...), NSParagraphStyleAttributeName: paragraphStyle, ] let attributedText = NSAttributedString(string: text, attributes: attributes) textView.attributedText = attributedText [email protected] NSAttributedString

  63. let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.minimumLineHeight = ceil(font.lineHeight) paragraphStyle.maximumLineHeight = ceil(font.lineHeight)

    paragraphStyle.lineSpacing = 8 let attributes = [ NSFontAttributeName: font, NSForegroundColorAttributeName: UIColor(...), NSParagraphStyleAttributeName: paragraphStyle, ] let attributedText = NSAttributedString(string: text, attributes: attributes) textView.attributedText = attributedText [email protected] NSAttributedString

  64. [email protected] ߦؒͷมߋ

  65. [email protected] ߦؒͷมߋ

  66. let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.minimumLineHeight = ceil(font.lineHeight) paragraphStyle.maximumLineHeight = ceil(font.lineHeight)

    paragraphStyle.lineSpacing = 8 [email protected] min/maxLineHeight

  67. [email protected] min/maxLineHeight

  68. [email protected] minimumLineHeight

  69. [email protected] maximumLineHeight

  70. NSAttributedStringΛ׆༻͢Δ [email protected]

  71. [email protected] ͞ΒʹߦؒΛ޿͘

  72. [email protected] ͞ΒʹߦؒΛ޿͘

  73. [email protected] Օ৚ॻ͖

  74. ·ͱΊ • iOS 7Ҏ߱ͷςΩετϨΠΞ΢τ͸ɺ͍͔ʹ ΩϨΠͳNSAttributedStringΛ࡞Δ͔ • λΠϙάϥϑΟͷجૅΛ஌Ζ͏ • ϑΥϯτʹώϥΪϊΛࢦఆ͢Δͱ͖͸஫ҙ •

    Ͱ͖Δ͚ͩγεςϜϑΥϯτΛ࢖͓͏ [email protected]

  75. Questions? Katsuma Kishikawa [email protected] www.realm.io/jp @k_katsumi