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FromAtom
܅͚ͩͷGFMΤσΟλΛ࡞Ζ͏ʂ
iOSDC Japan 2023
2023/09/02 16:50~ Track C
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• ϐΫγϒגࣜձࣾ
• iOSΞϓϦςοΫϦʔυ
• ͖ͳSwift guard
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@FromAtom
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ࠓͷαϯϓϧϦϙδτϦ
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https://github.com/FromAtom/iosdc-2023-gfm-editor-sample
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Markdownͷྺ࢙
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ͬ͘͟Γ
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Markdownͱ
• 2004ʹδϣϯɾάϧʔόʔʹΑͬͯ։ൃ͞Εͨ
• ςΩετ͔ΒHTMLʹม͢ΔΈʢMarkdown.plʣ
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CommonMarkͱ
• Markdown.plΛ֦ுͨ͠ํݴ͕େྔʹੜ·Εͨ
‣ ֦ுྫɿςʔϒϧه๏ɺ٭ه๏
• ͦΕΛ౷Ұ͢ΔͨΊʹCommonMark͕ੜ·Εͨ
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GitHub Flavored Markdownͱʁ
• CommonMarkΛ֦ுͨ͠ͷ͕GitHub Flavored MarkdownʢGFMʣ
• GitHub্Ͱ͑ΔMarkdownͱࣅͨͷ
• ݫີʹԼهͷ͕ҟͳ͍ͬͯΔ
‣ ֆจࣈ (ex. :smile:)
‣ ϝϯγϣϯ
‣ ίϛοτʢίϛοτIDʣɾΠγϡʔɾϦϙδτϦͷࢀর
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ࠓͷඪ
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ࠓͷඪ
• GitHub Flavored MarkdownϕʔεͰ
• ೖྗิॿ͕͋ͬͯ
• γϯλοΫεϋΠϥΠτ͞ΕΔ
• ΤσΟλʔΛ࡞Ζ͏
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ೖྗิॿΛ࡞Ζ͏
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ೖྗิॿͱ
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Markdownه๏Λ؆୯ʹೖྗͰ͖Δ
Ϙλϯิػೳ
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͜͏͢ΔͱͰ͖ͦ͏
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ΧʔιϧͷҐஔΛऔಘ͢Δ
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
ଠࣈͳΒআɾଠࣈ͡Όͳ͍ͳΒଠࣈه߸Λૠೖ
1
2
3
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ਖ਼نදݱͰ࣮Ͱ͖Δͬ͠ΐ
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ͱΓ͋͑ͣ ଠࣈ ͰͬͯΈΑ
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**太字**
ͬͯΈͨ݁Ռ
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**太字**
ͬͯΈͨ݁Ռ
• ΧʔιϧͷલޙͰߦΛׂ
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ͬͯΈͨ݁Ռ
**太 字**
• ΧʔιϧͷલޙͰߦΛׂ
• ׂޙʹ** Λਖ਼نදݱͰ୳ࠪ
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ͬͯΈͨ݁Ռ
• ΧʔιϧͷલޙͰߦΛׂ
• ׂޙʹ** Λਖ਼نදݱͰ୳ࠪ
• ୳ࠪʹώοτͨ͠Βଠࣈఆ
**太 字**
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ɺ͔ͬͨ……ʁ
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ͬͯΈͨ݁Ռ
**太字**太字じゃない**太字**
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ͬͯΈͨ݁Ռ
**太字**太字 じゃない**太字**
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ͬͯΈͨ݁Ռ
**太字**太字 じゃない**太字**
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ͬͯΈͨ݁Ռ
**太字**太字じゃない**太字**
ଠࣈ͡Όͳ͍ͷʹଠࣈఆ͞Εͯ͠·͏
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ͩΊ͡ΌΜ
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ਖ਼نදݱͰ͏·͍͔͘ͳ͍
`**コードスパン内なので太字じゃない**`
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ਖ਼نදݱͰ͏·͍͔͘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`**
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ਖ਼نදݱͰ͏·͍͔͘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`**`
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ਖ਼نදݱͰ͏·͍͔͘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**
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ਖ਼نදݱͰݶք͕͋Δ
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swift-markdownΛ͓͏
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swift-markdownͱʁ
• AppleެࣜͷMarkdownύʔβ
• cmark-gfmΛར༻͍ͯ͠Δ
‣ ͜ΕΛ͑GFMʹରԠͰ͖Δ
• https://github.com/apple/swift-markdown
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swift-markdownͱʁ
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import Markdown
let 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 "."
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ೖྗิॿʢଠࣈฤʣ
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ΧʔιϧͷҐஔΛऔಘ͢Δ
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
ଠࣈه߸Λૠೖ or আ͢Δ
1
2
3
4
ΧʔιϧҐஔΛswift-markdown͕ѻ͑ΔΑ͏ʹม͢Δ
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@available(iOS 3.2, *)
@NSCopying var selectedTextRange: UITextRange? { get set }
open var selectedRange: NSRange
ΧʔιϧͷҐஔΛऔಘ͢Δ
1
OR
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• swift-markdownͰൣғΛࣔ͢ͷʹSourceRange͕ΘΕΔ
• ΧʔιϧҐஔΛSourceRangeʹม͢Δඞཁ͕͋Δ
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/// A range in a source file.
public typealias SourceRange = Range
ΧʔιϧҐஔΛswift-markdown͕ѻ͑ΔΑ͏ʹม͢Δ
2
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/// 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 = line
self.column = column
self.source = source
}
public var description: String {
let path = source.map {
$0.path.isEmpty
? ""
: "\($0.path):"
} ?? ""
return "\(path)\(line):\(column)"
}
}
SourceLocationͷ࣮
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public 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 = line
self.column = column
self.source = source
}
}
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public 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 = line
self.column = column
self.source = source
}
}
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SourceLocationͷ࣮
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• line: શମͷԿߦ͔
• column: ߦ಄͔ΒԿจࣈ͔
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public 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 start
of 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 = line
self.column = column
self.source = source
}
}
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SourceLocationͷ࣮
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• line: શମͷnߦ
‣ n1࢝·Γ
• column: ߦ಄͔Βmจࣈ
‣ m1࢝·Γ
‣ UTF-8ͰͷByte
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😁
ΧʔιϧҐஔΛSourceLocationʹม͢ΕOK
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ΧʔιϧҐஔ
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@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
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😭
ߦͳΜͯͳ͍
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💪
UITextRange͔ΒSourceLocationʹม
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import UIKit
import Markdown
extension 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
guard
let 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
guard
let 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 + 1
return SourceLocation(line: lineCount, column: utf8BasedColumnCount, source: nil)
}
}
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
※ϓϩμΫγϣϯͰ࣮͢Δ߹UITextViewΛExtension͠ͳ͍΄͏͕ྑ͍Α
UITextRange͔ΒSourceLocationʹม͢Δίʔυ
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MarkupWalkerΛ͏
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import Markdown
struct StrongWalker: MarkupWalker {
var isStrong = false
var cursorSourceLocation: SourceLocation
mutating func visitStrong(_ strong: Strong) -> () {
if let range = strong.range, range.contains(cursorSourceLocation) {
isStrong = true
return
}
descendInto(strong)
}
}
Visitor patternʹै࣮ͬͯ
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
3
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MarkupWalkerΛ͏
48
import Markdown
struct StrongWalker: MarkupWalker {
var isStrong = false
var cursorSourceLocation: SourceLocation
mutating func visitStrong(_ strong: Strong) -> () {
if let range = strong.range, range.contains(cursorSourceLocation) {
isStrong = true
return
}
descendInto(strong)
}
}
Visitor patternʹै࣮ͬͯ
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
3
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MarkupWalkerΛ͏
49
import Markdown
struct StrongWalker: MarkupWalker {
var isStrong = false
var cursorSourceLocation: SourceLocation
mutating func visitStrong(_ strong: Strong) -> () {
if let range = strong.range, range.contains(cursorSourceLocation) {
isStrong = true
return
}
descendInto(strong)
}
}
Visitor patternʹै࣮ͬͯ
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
3
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guard 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true
ΧʔιϧҐஔ͕ଠࣈ͔Ͳ͏͔֬ೝ͢Δ
3
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σϞಈը
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• ଠࣈ͡Όͳ͔ͬͨΒ
‣ "****"Λૠೖͯ͋͛͠Δ
‣ ૠೖޙʹΧʔιϧΛҠಈͯ͋͛͠Δͱ͞Βʹ
• ଠࣈͩͬͨΒ
‣ ͜Εswift-markdownͰରԠ͢Δ
ଠࣈه߸Λૠೖ or আ͢Δ
4
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ΧʔιϧҐஔͷଠࣈΛղআ
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struct StrongRemover: MarkupRewriter {
var cursorSourceLocation: SourceLocation
func 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)Λฦ͢ͷͰͳ͘ɺஸೡͳॲཧ͕ඞཁͰ͢
MarkupRewriterΛར༻͢Δ
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ೖྗิॿ͕ 🎉
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γϯλοΫεϋΠϥΠτΛ࡞Ζ͏
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γϯλοΫεϋΠϥΠτʢଠࣈͷΈʣ
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1 MarkupWalkerͰଠࣈه๏ͷSourceRangeΛऔಘ
SourceRangeΛNSRangeʹม
NSAttributedStringΛੜ
2
3
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struct AttributedStringWalker: MarkupWalker {
var strongSourceRanges: [SourceRange] = []
mutating func visitStrong(_ strong: Strong) -> () {
if let range = strong.range {
strongSourceRanges.append(range)
}
descendInto(strong)
}
}
1 MarkupWalkerͰଠࣈه๏ͷSourceRangeΛऔಘ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
SourceLocation: UTF-8
NSAttributedString: UTF-16
ref: https://developer.apple.com/documentation/foundation/nsattributedstring/1418432-length
Χϯτํ๏ͷҧ͍ʹҙ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
SourceLocation: UTF-8
NSAttributedString: UTF-16
ref: https://developer.apple.com/documentation/foundation/nsattributedstring/1418432-length
Χϯτํ๏ͷҧ͍ʹҙ
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extension UITextView {
func convertToNSRange(from sourceRange: SourceRange) -> NSRange? {
guard
let start = convertToBound(from: sourceRange.lowerBound),
let end = convertToBound(from: sourceRange.upperBound)
else {
return nil
}
return NSRange(start.. Int? {
var currentLine: Int = 1
var utf16CharCount: Int = 0
for 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 += 1
utf16CharCount += line.utf16.count + "\n".utf16.count
}
return nil
}
}
SourceRangeΛNSRangeʹม
2
͍ͷͰޙ͔ΒࢿྉαϯϓϧϦϙδτϦΛݟͯͶ
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let 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 = attributedString
NSAttributedStringΛੜ
3
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let 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 = attributedString
NSAttributedStringΛੜ
3
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let 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 = attributedString
NSAttributedStringΛੜ
3
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let 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 = attributedString
NSAttributedStringΛੜ
3
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let 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 = attributedString
NSAttributedStringΛੜ
3
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let 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 = attributedString
NSAttributedStringΛੜ
3
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γϯλοΫεϋΠϥΠτʂ
72
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ೖྗิॿͱ
γϯλοΫεϋΠϥΠτΛ
ଞͷه๏ʹର࣮ͯ͢͠Ε
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ͬͱஸೡʹγϯλοΫεϋΠϥΠτΛ࡞Δ
https://fortee.jp/iosdc-japan-2020/proposal/32f815cc-8b16-4321-9cf4-c74f70287190
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PreviewͲ͏ͨ͠Βʁ
75
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Preview
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NSAttributedStringͱSwiftUIΛࢼ͢
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SwiftUI
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NSAttributedString
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Ͳ͏͢ΔͱΑ͍ʁ
79
• swift-markdownͰHTMLʹมͯ͠WebViewͰදࣔ
• keitaoouchi/MarkdownView ͳͲͷϥΠϒϥϦΛར༻͢Δ
• markedjs/marked ΛಡΈࠐΜͩHTMLΛWebViewͰදࣔ͢Δ
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Ͳ͏͢ΔͱΑ͍ʁ
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• swift-markdownͰHTMLʹมͯ͠WebViewͰදࣔ
• keitaoouchi/MarkdownView ͳͲͷϥΠϒϥϦΛར༻͢Δ
• markedjs/marked ΛಡΈࠐΜͩHTMLΛWebViewͰදࣔ͢Δ
ΞϓϦͷ༷ʹ߹Θͤͯબ΅͏
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·ͱΊ
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• Markdownͷೖྗิॿਖ਼نදݱͰ͍͠
• ؤுͬͯSourceLocationΛม͠Α͏
• MarkupWalker, MarkupRemoverΛ͍͍͑ͩͨͳΜͰͰ͖Δ
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͕࣌ؒ༨ͬͨ࣌ͷTips
82
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͜ͷೖྗิॿόʔΛ
ΩʔϘʔυʹैͤ͞Δํ๏
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iOS15+
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StoryboardͰઃఆ͢Δํ๏
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StoryboardͰઃఆ͢Δํ๏
85
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StoryboardͰઃఆ͢Δํ๏
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StoryboardͰઃఆ͢Δํ๏
87
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ίʔυ্Ͱઃఆ͢Δํ๏
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NSLayoutConstraint.activate([
view.keyboardLayoutGuide.topAnchor.constraint(equalTo: バーのView.bottomAnchor, constant: 0)
])
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ίʔυ্Ͱઃఆ͢Δํ๏
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NSLayoutConstraint.activate([
view.keyboardLayoutGuide.topAnchor.constraint(equalTo: バーのView.bottomAnchor, constant: 0)
])