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This is a Objective-C category that provides a series of convenience methods for creating auto layout constraints. This is particularly useful for setting centering constraints, which aren't easily done in visual format language. It also provides a few methods for quickly finding constraints in case you want to change or replace them as controls are moved and/or resized.
See the class reference for more information.
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This was developed using Xcode 5, and tested with iOS 6 and iOS 7.
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If you have any questions, do not hesitate to create an issue on the GitHub issues page.
Robert Ryan
November 16, 2013