- August 22, 2025
- Mins Read
Base types for theming an app.
CostumeKit is made of up a set of Swift protocols. They are meant to be implemented by you in your app.
Featured in Little Bites of Cocoa Bite #270: Implementing Theming with CostumeKit
Color đš
Includes Color and ColorPalette protocols.
Usage:
public enum MyAppColors : Color, ColorPalette {
case white = “FFFFFF”
case lightTeal = “3CB39E”
case forestGreen = “216055”
case black = “000000”
}
Font đ
Includes Font protocol, and one concrete SystemFont implementation for iOS system fonts.
Usage:
public struct MyAppFont : Font {
public init(size: FontSize = .textStyle(.body)) {
self.size = size
}
// Font
public var size: FontSize
// FontConvertible
public var FontValue: UIFont {
return UIFont(name: “SomeCustomFont”, size: pointSize)!
}
}
SVG đ
Includes SVG Protocol and SVGMetadata type.
Usage:
enum MyAppSVGs {
case clockGlyph
case bird
}
extension MyAppSVGs : SVG {
public func metadata() -> SVGMetadata {
switch self {
case .clockGlyph: return SVGMetadata(name: “clock”, size: CGSize(width: 100, height: 100), fullColor: false)
case .bird: return SVGMetadata(name: “bird”, size: CGSize(width: 58, height: 28), fullColor: true)
}
}
}
What you do with SVGMetadata is up to you. I recommend SwiftSVG from Michael Choe. Read more here to learn how to use it.
CostumeKit‘s goals are to be a generic solution, so no assumptions are made about how something should be retrieved from disk, parsed, etc. You’ll need to implement these anyways, so nothing is forced on you.
Costume đ©
Includes Costume protocol. Usage:
open class MyAppCostume : Costume {
let spacing = CGFloat(8)
public func wearRootBackground(_ view: UIView) {
view.backgroundColor = Color.black.colorValue
}
public func wearHeadline(_ label: UILabel) {
label.font = MyAppFont(size: .textStyle(.title1)).fontValue
label.textColor = MyAppColors.forestGreen.colorValue
}
public var name: String { return “Default” }
public var description: String { return “The default costume.” }
public init() { }
}
GitHub
#carthage #colors #images #ios #ios-lib #protocol #swift
YOU MIGHT ALSO LIKE...
- August 21, 2025
- SwiftUI
A ”Framework for showing alerts like the one used when copying from pasteboard or connecting Apple pencil.
- August 21, 2025
- SwiftUI
A SwiftUI Marquee or "scrolling text" effect found in Apple native apps. For when one line isn't enough, but two ...
- August 21, 2025
- SwiftUI
Introduction Text composition in SwiftUI can often be cumbersome, especially when there's logic affecting its format and content. TextBuilder leverages the ...
- August 21, 2025
- Mins Read
- August 21, 2025
- Mins Read
- August 21, 2025
- Mins Read
- August 20, 2025
- Mins Read
