19 lines
1.1 KiB
Swift
19 lines
1.1 KiB
Swift
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import Foundation
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extension NSMutableAttributedString {
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/// Applies a bold font to the first portion of the string that matches the given string
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/// - Parameter matchingString: the string to search for and bold
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/// - Parameter textStyle: The text style to use for the bolded string
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/// - Parameter weight: The font weight to use for the bolded string
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/// - Parameter traitCollection: The trait collection used for generating the font
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public func applyBoldFont(to matchingString: String, textStyle: DynamicTextStyle, weight: UIFont.Weight = .semibold, matching traitCollection: UITraitCollection) {
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// NSString and NSRange are used here for better compatability with NSAttributedString
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let range = (string as NSString).range(of: matchingString, options: .caseInsensitive)
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guard range.location != NSNotFound else {
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return
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}
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let boldFont = UIFont.wmf_font(textStyle.with(weight: weight), compatibleWithTraitCollection: traitCollection)
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addAttribute(.font, value: boldFont, range: range)
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}
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}
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