35 lines
1.5 KiB
Swift
35 lines
1.5 KiB
Swift
import UIKit
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extension UIFont {
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func withTraits(traits: UIFontDescriptor.SymbolicTraits) -> UIFont {
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UIFont(descriptor: fontDescriptor.withSymbolicTraits(traits)!, size: 0) // keep size as is
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}
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func bold() -> UIFont { withTraits(traits: .traitBold) }
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func italic() -> UIFont { withTraits(traits: .traitItalic) }
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func monoSpace() -> UIFont {
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let traits = fontDescriptor.object(forKey: .traits) as? [UIFontDescriptor.TraitKey: Any] ?? [:]
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let weight = (traits[.weight] as? CGFloat) ?? UIFont.Weight.regular.rawValue
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return .monospacedDigitSystemFont(ofSize: pointSize, weight: .init(rawValue: weight))
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}
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}
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extension NSMutableAttributedString {
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static private var def: UIFont = .preferredFont(forTextStyle: .body)
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func normal(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: .preferredFont(forTextStyle: style)) }
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func bold(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).bold()) }
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func italic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).italic()) }
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func h1(_ str: String) -> Self { normal(str, .title1) }
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func h2(_ str: String) -> Self { normal(str, .title2) }
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func h3(_ str: String) -> Self { normal(str, .title3) }
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private func append(_ str: String, withFont: UIFont) -> Self {
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append(NSAttributedString(string: str, attributes: [
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.font : withFont,
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.foregroundColor : UIColor.sysFg
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]))
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return self
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}
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}
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