Compiler folks could explain this better, but the root issue is that
__attribute__((NSObject)) doesn’t do as much as you might expect given the way
you’ve declared it. Its better in the long run to just not rely upon it.
On Jan 24, 2014, at 10:58 AM, Kevin Meaney <k...@yvs.eu.com> wrote:
> Building on and compiling for minimum system of 10.9. Xcode 5.0.1
>
> Using ARC.
>
> I have a property declared so:
>
> @property (readonly, strong) __attribute__((NSObject)) CGContextRef
> context
>
> I have a designatied initializer defined like so:
>
> -(instancetype)initWithCGContext:(CGContextRef)theContext
>
> The object is alloc'd and the init method is called immediately after the
> context is created. Immediately after the init method returns the context is
> released.
>
> If in the implementation of the init method I have:
>
> self->_context = theContext
>
> Then the first time I try and access the context I get a memory access
> exception. If I replace that with:
>
> self->_context = CGContextRetain(theContext);
>
> Then I get a memory leak of the context when my object is destroyed.
>
> If however I just declare my property like so:
>
> @property (readonly) CGContextRef context;
>
> And in the initializer I use:
>
> self->_context = CGContextRetain(theContext);
>
> And add a dealloc:
>
> -(void)dealloc
> {
> CGContextRelease(self->_context);
> }
>
> Then everything works as desired.
>
> I'd like to know what I'm doing wrong.
>
> Kevin
>
>
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--
David Duncan
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