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Composable Auto Layout Constraints
.package(url: "https://github.com/Hsieh-1989/HSLayout.git", from: "0.1.0")


A library for building autolayout constraints in a consistent and understandable way, with composition in mind.


  • iOS 11.0+ / Mac OS X 11.0+ / tvOS 11.0+
  • Xcode 12.0+
  • Swift 5.3+


You can add HSLayout to an Xcode project by adding it as a package dependency.


If you want to use HSLayout in a SwiftPM project, it's as simple as adding a dependencies clause to your Package.swift:

dependencies: [
    .package(url: "https://github.com/Hsieh-1989/HSLayout.git", from: "0.1.0")



Attaching a view to its superview with NSLayoutConstraint:

view.translatesAutoresizingMaskIntoConstraints = false
    view.topAnchor.constraint(equalTo: superview.topAnchor, constant: 0),
    view.leadingAnchor.constraint(equalTo: superview.leadingAnchor, constant: 0),
    view.bottomAnchor.constraint(equalTo: superview.bottomAnchor, constant: 0),
    view.trailingAnchor.constraint(equalTo: superview.trailingAnchor, constant: 0)

with HSLayout:

superview.addSubview(view, layout: .fit())


Constraining the center of a view to its superview with NSLayoutConstraint:

    view.centerXAnchor.constraint(equalTo: superview.centerXAnchor, constant: 0)
    view.centerYAnchor.constraint(equalTo: superview.centerYAnchor, constant: 0)

with HSLayout:

view.constraints(to: superview, layout: .center)


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Last commit: 4 weeks ago

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