iOSDC Japan 2023 レギュラートーク（20分） 2023/09/02 16:50〜Track C
https://fortee.jp/iosdc-japan-2023/proposal/17181b9b-3c8f-471f-93db-da377ad90ece
FromAtom܅͚ͩͷGFMΤσΟλΛ࡞Ζ͏ʂiOSDC Japan 20232023/09/02 16:50~ Track C
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• ϐΫγϒגࣜձࣾ• iOSΞϓϦςοΫϦʔυ• ͖ͳSwift guard2@FromAtom
ࠓͷαϯϓϧϦϙδτϦ3https://github.com/FromAtom/iosdc-2023-gfm-editor-sample
Markdownͷྺ࢙4ͬ͘͟Γ
Markdownͱ• 2004ʹδϣϯɾάϧʔόʔʹΑͬͯ։ൃ͞Εͨ• ςΩετ͔ΒHTMLʹม͢ΔΈʢMarkdown.plʣ5
CommonMarkͱ• Markdown.plΛ֦ுͨ͠ํݴ͕େྔʹੜ·Εͨ‣ ֦ுྫɿςʔϒϧه๏ɺ٭ه๏• ͦΕΛ౷Ұ͢ΔͨΊʹCommonMark͕ੜ·Εͨ6
GitHub Flavored Markdownͱʁ• CommonMarkΛ֦ுͨ͠ͷ͕GitHub Flavored MarkdownʢGFMʣ• GitHub্Ͱ͑ΔMarkdownͱࣅͨͷ• ݫີʹԼهͷ͕ҟͳ͍ͬͯΔ‣ ֆจࣈ (ex. :smile:)‣ ϝϯγϣϯ‣ ίϛοτʢίϛοτIDʣɾΠγϡʔɾϦϙδτϦͷࢀর7
ࠓͷඪ8
ࠓͷඪ• GitHub Flavored MarkdownϕʔεͰ• ೖྗิॿ͕͋ͬͯ• γϯλοΫεϋΠϥΠτ͞ΕΔ• ΤσΟλʔΛ࡞Ζ͏9
ೖྗิॿΛ࡞Ζ͏10
ೖྗิॿͱ11Markdownه๏Λ؆୯ʹೖྗͰ͖Δ Ϙλϯิػೳ
͜͏͢ΔͱͰ͖ͦ͏12ΧʔιϧͷҐஔΛऔಘ͢ΔΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢ΔଠࣈͳΒআɾଠࣈ͡Όͳ͍ͳΒଠࣈه߸Λૠೖ123
13ਖ਼نදݱͰ࣮Ͱ͖Δͬ͠ΐ
14ͱΓ͋͑ͣ ଠࣈ ͰͬͯΈΑ
15**太字**ͬͯΈͨ݁Ռ
16**太字**ͬͯΈͨ݁Ռ• ΧʔιϧͷલޙͰߦΛׂ
17ͬͯΈͨ݁Ռ**太 字**• ΧʔιϧͷલޙͰߦΛׂ• ׂޙʹ** Λਖ਼نදݱͰ୳ࠪ
18ͬͯΈͨ݁Ռ• ΧʔιϧͷલޙͰߦΛׂ• ׂޙʹ** Λਖ਼نදݱͰ୳ࠪ• ୳ࠪʹώοτͨ͠Βଠࣈఆ**太 字**
19ɺ͔ͬͨ……ʁ
20ͬͯΈͨ݁Ռ**太字**太字じゃない**太字**
21ͬͯΈͨ݁Ռ**太字**太字 じゃない**太字**
22ͬͯΈͨ݁Ռ**太字**太字 じゃない**太字**
23ͬͯΈͨ݁Ռ**太字**太字じゃない**太字**ଠࣈ͡Όͳ͍ͷʹଠࣈఆ͞Εͯ͠·͏
24ͩΊ͡ΌΜ
25ਖ਼نදݱͰ͏·͍͔͘ͳ͍`**コードスパン内なので太字じゃない**`
26ਖ਼نදݱͰ͏·͍͔͘ͳ͍`**コードスパン内なので太字じゃない**`**`コードスパン全体が太字`**
27ਖ਼نදݱͰ͏·͍͔͘ͳ͍`**コードスパン内なので太字じゃない**`**`コードスパン全体が太字`**`**`太字記号がコードスパン内にあるので太字じゃない`**`
28ਖ਼نදݱͰ͏·͍͔͘ͳ͍`**コードスパン内なので太字じゃない**`**`コードスパン全体が太字`**`**`太字記号がコードスパン内にあるので太字じゃない`**`**複数行にまたがる太字**
29ਖ਼نදݱͰݶք͕͋Δ
swift-markdownΛ͓͏30
swift-markdownͱʁ• AppleެࣜͷMarkdownύʔβ• cmark-gfmΛར༻͍ͯ͠Δ‣ ͜ΕΛ͑GFMʹରԠͰ͖Δ• https://github.com/apple/swift-markdown31
swift-markdownͱʁ32import Markdownlet source = "This is a markup *document*."let document = Document(parsing: source)print(document.debugDescription())// Document// └─ Paragraph// ├─ Text "This is a markup "// ├─ Emphasis// │ └─ Text "document"// └─ Text "."
ೖྗิॿʢଠࣈฤʣ33ΧʔιϧͷҐஔΛऔಘ͢ΔΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δଠࣈه߸Λૠೖ or আ͢Δ1234ΧʔιϧҐஔΛswift-markdown͕ѻ͑ΔΑ͏ʹม͢Δ
34@available(iOS 3.2, *)@NSCopying var selectedTextRange: UITextRange? { get set }open var selectedRange: NSRangeΧʔιϧͷҐஔΛऔಘ͢Δ1OR
• swift-markdownͰൣғΛࣔ͢ͷʹSourceRange͕ΘΕΔ• ΧʔιϧҐஔΛSourceRangeʹม͢Δඞཁ͕͋Δ35/// A range in a source file.public typealias SourceRange = RangeΧʔιϧҐஔΛswift-markdown͕ѻ͑ΔΑ͏ʹม͢Δ2
36/// A location in a source file.public struct SourceLocation: Hashable, CustomStringConvertible, Comparable {public static func < (lhs: SourceLocation, rhs: SourceLocation) -> Bool {if lhs.line < rhs.line {return true} else if lhs.line == rhs.line {return lhs.column < rhs.column} else {return false}}/// The line number of the location.public var line: Int/// The number of bytes in UTF-8 encoding from the start of the line to the character at this source location.public var column: Int/// The source file for which this location applies, if it came from an accessible location.public var source: URL?/// Create a source location with line, column, and optional source to which the location applies.////// - parameter line: The line number of the location, starting with 1./// - parameter column: The column of the location, starting with 1./// - parameter source: The URL in which the location resides, or `nil` if there is not a specific/// file or resource that needs to be identified.public init(line: Int, column: Int, source: URL?) {self.line = lineself.column = columnself.source = source}public var description: String {let path = source.map {$0.path.isEmpty? "": "\($0.path):"} ?? ""return "\(path)\(line):\(column)"}}SourceLocationͷ࣮
37public struct SourceLocation: Hashable, CustomStringConvertible, Comparable {/// Create a source location with line, column, and optional source to which the location applies.////// - parameter line: The line number of the location, starting with 1./// - parameter column: The column of the location, starting with 1./// - parameter source: The URL in which the location resides, or `nil` if there is not a specific/// file or resource that needs to be identified.public init(line: Int, column: Int, source: URL?) {self.line = lineself.column = columnself.source = source}}
38public struct SourceLocation: Hashable, CustomStringConvertible, Comparable {/// Create a source location with line, column, and optional source to which the location applies.////// - parameter line: The line number of the location, starting with 1./// - parameter column: The column of the location, starting with 1./// - parameter source: The URL in which the location resides, or `nil` if there is not a specific/// file or resource that needs to be identified.public init(line: Int, column: Int, source: URL?) {self.line = lineself.column = columnself.source = source}}
SourceLocationͷ࣮39• line: શମͷԿߦ͔• column: ߦ಄͔ΒԿจࣈ͔
40public struct SourceLocation: Hashable, CustomStringConvertible, Comparable {/// The line number of the location.public var line: Int/// The number of bytes in UTF-8 encoding from the startof the line to the character at this source location.public var column: Int/// Create a source location with line, column, and optional source to which the location applies.////// - parameter line: The line number of the location, starting with 1./// - parameter column: The column of the location, starting with 1./// - parameter source: The URL in which the location resides, or `nil` if there is not a specific/// file or resource that needs to be identified.public init(line: Int, column: Int, source: URL?) {self.line = lineself.column = columnself.source = source}}
SourceLocationͷ࣮41• line: શମͷnߦ‣ n1࢝·Γ• column: ߦ಄͔Βmจࣈ‣ m1࢝·Γ‣ UTF-8ͰͷByte
😁ΧʔιϧҐஔΛSourceLocationʹม͢ΕOK42
ΧʔιϧҐஔ43@NSCopying var selectedTextRange: UITextRange? { get set }textView.selectedRange.location // 文章全体のn文字目textView.selectedRange.length // locationからm文字目textView.selectedTextRange?.start // 文章の先頭からn文字目textView.selectedTextRange?.end // 文章の先頭からm文字目open var selectedRange: NSRange
😭ߦͳΜͯͳ͍44
💪UITextRange͔ΒSourceLocationʹม45
46import UIKitimport Markdownextension UITextView {func sourceLocation() -> SourceLocation? {guard let selectedTextRange else {return nil}// ドキュメントの先頭からカーソル位置までの文字列を取得guardlet beginningOfDocumentToCursorPositionRange = textRange(from: beginningOfDocument, to: selectedTextRange.start),let beginningOfDocumentToCursorPositionString = text(in: beginningOfDocumentToCursorPositionRange)else {return nil}let lineCount = beginningOfDocumentToCursorPositionString.components(separatedBy: .newlines).count// カーソルがある行の行頭からカーソル位置までの文字列を取得guardlet lineRange = tokenizer.rangeEnclosingPosition(selectedTextRange.start, with: .line, inDirection: .storage(.forward)),let columnStringRange = textRange(from: lineRange.start, to: selectedTextRange.start),let columnString = text(in: columnStringRange)else {return nil}// SourceLocationのcolumnはUTF-8でカウントする// SourceLocationはカウントが1から始まるので1を足すlet utf8BasedColumnCount = columnString.utf8.count + 1return SourceLocation(line: lineCount, column: utf8BasedColumnCount, source: nil)}}͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ※ϓϩμΫγϣϯͰ࣮͢Δ߹UITextViewΛExtension͠ͳ͍΄͏͕ྑ͍ΑUITextRange͔ΒSourceLocationʹม͢Δίʔυ
MarkupWalkerΛ͏47import Markdownstruct StrongWalker: MarkupWalker {var isStrong = falsevar cursorSourceLocation: SourceLocationmutating func visitStrong(_ strong: Strong) -> () {if let range = strong.range, range.contains(cursorSourceLocation) {isStrong = truereturn}descendInto(strong)}}Visitor patternʹै࣮ͬͯΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ3
MarkupWalkerΛ͏48import Markdownstruct StrongWalker: MarkupWalker {var isStrong = falsevar cursorSourceLocation: SourceLocationmutating func visitStrong(_ strong: Strong) -> () {if let range = strong.range, range.contains(cursorSourceLocation) {isStrong = truereturn}descendInto(strong)}}Visitor patternʹै࣮ͬͯΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ3
MarkupWalkerΛ͏49import Markdownstruct StrongWalker: MarkupWalker {var isStrong = falsevar cursorSourceLocation: SourceLocationmutating func visitStrong(_ strong: Strong) -> () {if let range = strong.range, range.contains(cursorSourceLocation) {isStrong = truereturn}descendInto(strong)}}Visitor patternʹै࣮ͬͯΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ3
50guard let cursorSourceLocation = textView.sourceLocation() else {return}let document = Document(parsing: textView.text)var strongWalker = StrongWalker(cursorSourceLocation: cursorSourceLocation)strongWalker.visit(document)print(strongWalker.isStrong) // カーソルが太字だとtrueΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ3
σϞಈը51
52• ଠࣈ͡Όͳ͔ͬͨΒ‣ "****"Λૠೖͯ͋͛͠Δ‣ ૠೖޙʹΧʔιϧΛҠಈͯ͋͛͠Δͱ͞Βʹ• ଠࣈͩͬͨΒ‣ ͜Εswift-markdownͰରԠ͢Δଠࣈه߸Λૠೖ or আ͢Δ4
ΧʔιϧҐஔͷଠࣈΛղআ53struct StrongRemover: MarkupRewriter {var cursorSourceLocation: SourceLocationfunc visitStrong(_ strong: Strong) -> Markup? {if let range = strong.range, range.contains(cursorSourceLocation) {return Text(strong.plainText)}return strong}}var strongRemover = StrongRemover(cursorSourceLocation: cursorSourceLocation)let result = strongRemover.visit(document)textView.text = result!.format()※ෳࡶͳMarkdownʹରԠ͢ΔʹText(strong.plainText)Λฦ͢ͷͰͳ͘ɺஸೡͳॲཧ͕ඞཁͰ͢MarkupRewriterΛར༻͢Δ
54ೖྗิॿ͕ 🎉
γϯλοΫεϋΠϥΠτΛ࡞Ζ͏55
γϯλοΫεϋΠϥΠτʢଠࣈͷΈʣ561 MarkupWalkerͰଠࣈه๏ͷSourceRangeΛऔಘSourceRangeΛNSRangeʹมNSAttributedStringΛੜ23
57struct AttributedStringWalker: MarkupWalker {var strongSourceRanges: [SourceRange] = []mutating func visitStrong(_ strong: Strong) -> () {if let range = strong.range {strongSourceRanges.append(range)}descendInto(strong)}}1 MarkupWalkerͰଠࣈه๏ͷSourceRangeΛऔಘ
58extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
59extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
60extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
61extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
62extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
63extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶSourceLocation: UTF-8NSAttributedString: UTF-16ref: https://developer.apple.com/documentation/foundation/nsattributedstring/1418432-lengthΧϯτํ๏ͷҧ͍ʹҙ
64extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶSourceLocation: UTF-8NSAttributedString: UTF-16ref: https://developer.apple.com/documentation/foundation/nsattributedstring/1418432-lengthΧϯτํ๏ͷҧ͍ʹҙ
65extension UITextView {func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {guardlet start = convertToBound(from: sourceRange.lowerBound),let end = convertToBound(from: sourceRange.upperBound)else {return nil}return NSRange(start..}private func convertToBound(from sourceLocation: SourceLocation) -> Int? {var currentLine: Int = 1var utf16CharCount: Int = 0for line in text.components(separatedBy: .newlines) {if currentLine == sourceLocation.line {let columnString = line.utf8.prefix(sourceLocation.column - 1)let columnStringUtf16Count = columnString.endIndex.utf16Offset(in: line)return utf16CharCount + columnStringUtf16Count}currentLine += 1utf16CharCount += line.utf16.count + "\n".utf16.count}return nil}}SourceRangeΛNSRangeʹม2͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
66let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
67let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
68let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
69let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
70let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
71let document = Document(parsing: textView.text)var strongWalker = AttributedStringWalker()strongWalker.visit(document)let attributedString = NSMutableAttributedString(string: textView.text)for strongRange in strongWalker.strongSourceRanges {let range = textView.convertToNSRange(from: strongRange)!attributedString.addAttributes([.font: UIFont.systemFont(ofSize: 20, weight: .bold)], range: range)} textView.attributedText = attributedStringNSAttributedStringΛੜ3
γϯλοΫεϋΠϥΠτʂ72
ೖྗิॿͱγϯλοΫεϋΠϥΠτΛଞͷه๏ʹର࣮ͯ͢͠Ε73
74ͬͱஸೡʹγϯλοΫεϋΠϥΠτΛ࡞Δhttps://fortee.jp/iosdc-japan-2020/proposal/32f815cc-8b16-4321-9cf4-c74f70287190
PreviewͲ͏ͨ͠Βʁ75
Preview76NSAttributedStringͱSwiftUIΛࢼ͢
77SwiftUI
78NSAttributedString
Ͳ͏͢ΔͱΑ͍ʁ79• swift-markdownͰHTMLʹมͯ͠WebViewͰදࣔ• keitaoouchi/MarkdownView ͳͲͷϥΠϒϥϦΛར༻͢Δ• markedjs/marked ΛಡΈࠐΜͩHTMLΛWebViewͰදࣔ͢Δ
Ͳ͏͢ΔͱΑ͍ʁ80• swift-markdownͰHTMLʹมͯ͠WebViewͰදࣔ• keitaoouchi/MarkdownView ͳͲͷϥΠϒϥϦΛར༻͢Δ• markedjs/marked ΛಡΈࠐΜͩHTMLΛWebViewͰදࣔ͢ΔΞϓϦͷ༷ʹ߹Θͤͯબ΅͏
·ͱΊ81• Markdownͷೖྗิॿਖ਼نදݱͰ͍͠• ؤுͬͯSourceLocationΛม͠Α͏• MarkupWalker, MarkupRemoverΛ͍͍͑ͩͨͳΜͰͰ͖Δ
͕࣌ؒ༨ͬͨ࣌ͷTips82
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