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A Swift DSL for expressing Auto Layout constraints in readable code

OSS scale score 273.9OSS health 67Update pace 0 commits/30d
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Stars
20,346
Primary language
Swift
License
MIT
Repository last updated
Jul 13, 2026
On this page

Overview

SnapKit is a library for writing Auto Layout constraints on iOS, macOS, and tvOS through a chained Swift API. After adding a view, developers can group width, height, centering, and related constraints inside snp.makeConstraints.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Key features

Group constraints in a Swift DSL

Expressions such as make.width.height.equalTo(50) and make.center.equalTo(view) describe layout relationships without assembling NSLayoutConstraint calls individually. The API covers making, updating, and remaking constraints in code-driven interfaces.

Sources: [1]

Best fit

Use it in code-built Apple platform interfaces

The library can be added through Swift Package Manager and targets iOS 14+, macOS 12+, and tvOS 14+. It fits projects that build view hierarchies programmatically and keep constraints close to the view code.

Sources: [1][2]

Before adoption

Confirm Xcode and platform requirements

The 6.0.0 README requires Xcode 26 or later and a Swift 6 toolchain. Local package tests can run on macOS, but demonstrating an iOS or tvOS interface still requires an appropriate Xcode project and Simulator or device.

Sources: [1][2][3]

Official sources

  1. [1]SnapKit 6.0.0 README(2026-10-04)
  2. [2]SnapKit 6.0.0 Package.swift(2026-10-04)
  3. [3]SnapKit 6.0.0 release(2026-10-04)
Supplemental curator note

SnapKit fits interfaces whose constraints live in code rather than storyboards. Compare its OS minimums and Xcode 26 with Swift 6 toolchain requirement against the project before adoption.

Try it in 3 steps

  1. 1

    Clone release 6.0.0

    Run in a terminal with Xcode 26 or later selected. If several versions are installed, set DEVELOPER_DIR for this session before cloning the reviewed release.

    git clone --branch 6.0.0 --depth 1 https://github.com/SnapKit/SnapKit.git snapkit-demo
  2. 2

    Inspect the Swift package targets

    Read Package.swift on macOS and list the SnapKit library and test targets.

    cd snapkit-demo && swift package describe
  3. 3

    Run the package tests

    Build and test with the selected Xcode 26+ macOS Swift toolchain. Validate iOS or tvOS UI behavior separately in an Xcode Simulator or on a device.

    swift test
Check the official README

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20,346 Stars

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Development activity

Last 90 days · weekly

Commits (last 30 days)
0
Open PRs
9

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GitHub data

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GitHub Topics

  • auto
  • autolayout
  • snapkit
  • swift
  • xcode
  • dsl
  • cocoapods
  • constraints
  • layout
  • ui
Stars
20,346
Forks
2,045
Watchers
388
Open issues
1
Contributors
80
Owner type
Organization
Primary language
Swift
License
MIT
Repository last updated
Jul 13, 2026
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