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Cocoa Programming for OS X: The Big Nerd Ranch Guide
book

Cocoa Programming for OS X: The Big Nerd Ranch Guide

by Aaron Hillegass, Adam Preble, Nate Chandler
April 2015
Intermediate to advanced
556 pages
17h 47m
English
Big Nerd Ranch Guides
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide

Challenge: Convert RGBWell to Use Bindings

In Chapter 5 you used action methods to trigger manually updating the r, g, and b properties. Convert RGBWell to use bindings instead.

Here are some hints:

  • To be clear about what you are doing, state what bindings you need: I want to bind the ‘R’ slider’s value attribute to the r property on MainWindowController.

  • You have avoided creating an initializer for MainWindowController in order to inherit the initializer from NSWindowController. To continue to inherit this initializer, you will need to provide a default value for an NSColor property. You can do this with an NSColor class method. Return to the NSColor reference page to find one that works for the application.

  • When your ...

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