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Re: Sensible way to extend base class?

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Re: Sensible way to extend base class?

Subject: Re: Sensible way to extend base class?
From: Keith Duncan <email@hidden>
Date: Wed, 20 May 2009 16:21:19 +0100

One would think that given the Objective-C 2.0 runtime (which is only available on iPhone OS, or 64-bit mode in Mac OS, ARGH!) and its support for iVar layouts, adding an ivar to an existing class would be possible. Since it isn't [...]

I thought that was one of the features of the Objective-C 2.0 runtime, is a non-fragile base class. Enabled by runtime computed instance variable offsets - which is why direct instance variable access is highly discouraged in any Objective-C 2.0 code.

Keith
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References:  
  >Sensible way to extend base class? (From: Graham Cox <email@hidden>)
  >Re: Sensible way to extend base class? (From: Jerry Krinock <email@hidden>)
  >Re: Sensible way to extend base class? (From: Graham Cox <email@hidden>)
  >Re: Sensible way to extend base class? (From: Jonathan del Strother <email@hidden>)
  >Re: Sensible way to extend base class? (From: Gwynne Raskind <email@hidden>)

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