Masonry is an iOS/OS X library for helping to create NSLayoutConstraints easily.
Masonry is an iOS/OS X library (https://github.com/Masonry/Masonry) for helping to create NSLayoutConstraints easily.
According to Masonry readMe:
Masonry is a light-weight layout framework which wraps AutoLayout with a nicer syntax. Masonry has its own layout DSL which provides a chainable way of describing your NSLayoutConstraints which results in layout code that is more concise and readable. Masonry supports iOS and Mac OS X.