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Make trains of constraints with a clean style!
.package(url: "https://github.com/dorvk/Constren.git", from: "1.0.1")

License: MIT Constren Cocoapods

Constren 🚂.🚃.🚋

Make trains of constraints with style!

               .lead(spacing: 16)
               .trail(image.leadingAnchor, spacing: 64)
               .height(100, relation: .greaterThan)

Constren is an easy to use, easy to read layout tool for UIKit


  • iOS 10.0+
  • Xcode 10.0+
  • Swift 4.0+



To add Constren into your project using CocoaPods, add it in your Podfile:

pod 'Constren', :git => 'https://github.com/dorvk/Constren.git'


To add Constren into your project using Carthage, specify it in your Cartfile:

github "dorvk/Constren"


Add the Sources folder into your project.


import Constren

let imageView = UIImageView()


imageView.constren.top()                                   // default is equalToSuperview with 0 spacing
                  .lead(spacing: 16)                       // you can add spacing
                  .trail(label.leadingAnchor, spacing: 16) 
                  .height(100, relation: .greaterThan)     // supports lessThan or greaterThan, default is equalTo

tableView.constren.fill()                                  // shortcuts

collectionView.constren.fill(lead: 16, bot: 32)

titleLabel.constren.horizontalFill(lead: 16)
                   .centerY(spacing: 16)
imageView.constren.centered(x: 16)


Stars: 3
Last commit: 2 weeks ago

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