Helios

A small library providing a set of Swift 5.1's Property Wrappers to be used with UIKit.

NOTE: This library is under active development and the selection of property wrappers may change.

Installation

Add this package to the Swift Packages list in your Xcode project settings. Alternatively add: .package(url: "https://github.com/bobek-balinek/Helios.git", from: "0.1.0") to your Package.swift file.

Available property wrappers

@FixedSize

This property wrapper let's you quickly define, using AutoLayout width and height dimensions for a wrapped UIView.

class MyView: UIView {
	@FixedSize(50, 50, radius: 25)
	var thumbnailImage: UIImageView = UIImageView()

	// …
}

@FixedSize takes up to three arguments: width: CGFloat, height: CGFloat, and radius: CGFloat. You can define width-only, width and height, or width, height and additionally clip the corners with a given radius.

---

@AspectRatio

This property wrapper let's you quickly define, using AutoLayout dimensions of a wrapped UIView, respecting given aspect ratio.

class MyView: UIView {
	@AspectRatio(4/3, radius: 15)
	var productImage: UIImageView = UIImageView()

	// …
}

@AspectRatio takes up to two arguments: ratio: CGFloat and radius: CGFloat. Radius can additionally clip the corners with a given radius.

---

@RoundedCorners

@RoundedCorners clips the corners of a wrapped UIView with a given radius.

class MyView: UIView {
	@RoundedCorners(25)
	var thumbnailImage: UIImageView = UIImageView()

	// …
}

---

@FontSize

@FontSize sets a system font of a given size on a wrapped UILabel instance. Additionally, you can set font weight and text color.

class MyView: UIView {
	@FontSize(24, weight: .bold, color: .red)
	var headingLabel: UILabel = UILabel()

	// …
}

---

@TextStyle

@TextStyle configures wrapped UILabel to use dynamic font style and sets a given UIFont.TextStyle. Additionally, you can set text alignment, text color and font traits such as bold or italic.

class MyView: UIView {
	@TextStyle(.title1, color: .red, alignment: .center, fontTraits: [.bold])
	var headingLabel: UILabel = UILabel()

	// …
}

Hope you'll enjoy using Helios in your iOS apps!