On Nov 13, 2011, at 1:16 AM, ico wrote:

> I am surprise that I just know we do not need to declare instance variables
> explicitly when we declare the property and use @synthesize.
> 
> That is we do not need a instance variable to be declared that is
> corresponds to the property declaration.
> 
> 
> 
> look at this blog:
> http://cocoawithlove.com/2010/03/dynamic-ivars-solving-fragile-base.html
> 
> 
> 
> However, I just wonder, is it really true that there is no ANY different
> between explicitly declaring iVars and not delaring it?
> 
> If so, is it a better approach that just declare the property and let
> @synthesize to generate the iVars itself.
> 
> 
> 
> Any more explaination and clarify will be appreciated.

Only difference is that you have to explicitly declare the ivar to be 
compatible with the 32-bit runtime.

If you’re 64-bit only (or if you require Lion or better), there’s no real 
reason to explicitly declare the ivars these days.

Charles_______________________________________________

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