At my blog

bitvectors.blogspot.com

article

Control iApp behaviors and properties with an XCode animation object

available at

http://bitvectors.blogspot.com/2014/05/control-iapp-behaviors-and-properties.html

describes XCode engineering that shows how one Xcode iApp animation object can control properties of any object within that XCode iApp. In this repository, file

DV.zip

has the complete XCode 5.1 iApp “DV” (for Dependent Variables) the article illustrates.