iOS Developer Library

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UIKit Framework Reference NSLayoutConstraint Class Reference

Document Revision History

This table describes the changes to NSLayoutConstraint Class Reference.

Date

Notes

2014-11-15

Described the activateConstraints: and deactivateConstraints: methods and the active property.

2014-07-15

Clarified that priority can be modified after creation so long as it is not going to or from required.

2013-10-22

Described the identifier property.

2012-12-13

Documented order of constraints created from visual format and added method groups.

2012-09-19

Added to iOS Library.

2011-06-06

New document that describes rules for dynamically laying out elements of a user interface.