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Alex Rupérez

Published: 03 Dec 09:32
I starred felginep/AttributedStringStyle at GitHub.
Focus on the semantics and the visual representation of NSAttributedString separately.
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Version License Platform

Blog post

You can find the associated blog post here.


To run the example project, clone the repo, and run pod install from the Example directory first.


  • iOS 9.0+
  • Swift 4.2


AttributedStringStyle is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'AttributedStringStyle'

How to use it

Define some abstract style anywhere in your app. For instance.

enum Style {
    case regular
    case highlighted

Once your style is defined we have two tools at your disposal:

  • AttributedStringBuilder that is helpful to create attributed string with styles for range of characters
  • AttributedStringStyler that defines which visual attributes to apply for each style

To create your attributed string and focus on the semantic and not the display, use the builder like so:

let content = "A simple string"
let builder = AttributedStringBuilder<Style>(string: content)
let range = NSString(string: content).range(of: "simple")
builder.addStyle(.highlighted, range: range)
let semanticAttributedString =

The attributed string has no visual attributes but semantics ones.

Simple String Semantics

Once your semantic content is defined, you can use the styler to create a new attributed string with visual attributes.

let styler = AttributedStringStyler<Style>()
    attributes: [
        .font: UIFont.systemFont(ofSize: 14),
        .foregroundColor: UIColor.gray
    forStyle: .regular
    attributes: [
        .font: UIFont.boldSystemFont(ofSize: 14),
    forStyle: .highlighted

let visualAttributedString = semanticAttributedString.styled(with: styler)

This time the result is visual.

Simple String Visual


Pierre Felgines


AttributedStringStyle is available under the MIT license. See the LICENSE file for more info.