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WILTAC #2: Designated initializers

October 10th, 2008 · No Comments

I learned today the term designated initializer:

When a class has multiple initializers, the designated initializer is the one that actually does the work, normally the one with the most parameters. All other initializers call the designated one, providing different amounts of default parameter values.

I was aware of the concept – many classes have [...]

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WILTAC #1: invoking methods on nil in Objective-C

October 7th, 2008 · No Comments

Welcome to the first installment of “What I learned today about Cocoa” (WILTAC).
I have recently started reading Aaron Hillegass’ excellent Cocoa Programming for Mac OS X, third edition, with the intention of brushing up my very lacking Cocoa skills (all of them learned empirically by looking at other people’s code and reading the documentation). To [...]

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