SNAPKIT
SnapKit is a DSL (domain-specific language) that simplifies work with Auto Layout and constraints. It is a tool for frontend developers that makes it much easier to create a page layout for your Swift application for iOS or MacOS.
Auto Layout itself is a cool and powerful tool for describing the relationships between views and their hierarchies, but at the same time, it is quite complex and not intuitive. Despite the fact that layout bindings have been constantly improving since iOS 9, SnapKit is still a must-have tool for those who value speed and convenience.
SnapKit makes code as close as possible to plain English text. It's more pleasant to read and easier to understand, in part because the new syntax eliminates the need for developers to write complex constructs by shortening them declaratively.
The best part of SnapKit is the ability to freely create chains by combining layout elements. The layout of snaps and constraints is simple and expressive, and the amount of code is less. With SnapKit, it becomes much easier to customize the display when you rotate the screen to landscape orientation, and generally change the View as you want. At the same time, if a developer wants to change any of the chains, they don't need to redo them all - just two commands, and the old version is automatically replaced with the new one.
Checking code for conflicts in SnapKit is also much easier than in the basic Auto Layout. The debug output will show informative pointers to possible problems, and developers will need much less time to find inconsistencies and fix them.
SnapKit is a DSL, a language whose task is to solve specific problems in a strictly defined place. It is needed to simplify the Auto Layout syntax, which is responsible for describing the dependencies and constraints of your application's views. Everything that can be done with SnapKit can be done without it, with standard tools. The best practice is to combine classic solutions with SnapKit features. And this is exactly what our Swift developers do in all their projects.