Chapter 11

Properties

Remember back in the mists at the dawn of time when we wrote accessor methods for our instance variables? We wrote a lot of boilerplate code, creating both a –setBlah method to set the object’s blah attribute (obviously) and a –blah method to retrieve it. If the attribute is an object, we needed to retain the new one and release the old one. Utilities are out there that will turn your class definition into method declarations and definitions that you can paste into your files. But still, writing accessor methods is a lot of mind-numbing work that can better be applied to doing the cool stuff that’s unique to your program.

In Objective-C 2.0, Apple introduced properties, a combination of new compiler directives and a new ...

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