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Cocoa Programming for OS X: The Big Nerd Ranch Guide by Aaron Hillegass, Adam Preble, Nate Chandler

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Challenge: Reposition Image Layers

Add a button and a text field to the view controller. When clicked, the button should reposition all the image layers. But the rounded black text container layer should stay put! Use the numeric value from the text field to set the duration of this repositioning animation.

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