frzi/swift-variablefonts

Extends UIFont/NSFont (and SwiftUI Font) for easier variable font support

Variable Fonts

Easier use of variable fonts with AppKit, UIKit and SwiftUI. For iOS, macOS, tvOS, watchOS and visionOS

Extends AppKit's NSFont, UIKit's UIFont and SwiftUI's Font with variable font features. Couldn't be easier!

How-to-use

Initializing font with axes.

let font = NSFont(name: "Amstelvar", size: 20, axes: [
	"wght": 650,
	"opsz": 100,
	"XTRA": 700,
])

New font with axes applied

let scienceGothic = UIFont(name: "ScienceGothic", size: 20)!
let slanted = scienceGothic.withAxis("slnt", value: -10)

Get all available axes of a font

let tiltWarp = NSFont(name: "TiltWarp-Regular", size: 100)!
let axes = tiltWarp.allAxes()
print(axes)
/*
[VariableFonts.FontAxis(
	id: 1481789268,
	name: "XROT",
	description: "Rotation in X",
	minimumValue: -45.0,
	maximumValue: 45.0,
	defaultValue: 0.0),
etc...]
*/

SwiftUI

Text("Hello world")
	.font(.custom(name: "Fraunces", size: 40, axes: [
		"wght": 900,
		"SOFT": 100,
		"WONK": 1,
	]))

Example: maxed out font

let nunito = UIFont(name: "NunitoSans", size: 20)!
let axes = nunito.allAxes()

// Creates a UIFont with all axes set to their maximum value.
let megaNunito = nunito.withAxes(
	Dictionary(uniqueKeysWithValues: axes.map { axis in
		return (axis.id, axis.maximumValue)
	})
)