> On Jan 30, 2015, at 8:43 PM, David Rowland <rowla...@sbcglobal.net> wrote:
> 
> It’s best to use ARC uniformly in a project and not mix with non-ARC modules. 
> Xcode has a tool to upgrade projects to ARC. I have used it a number of 
> times, and it seems to do a very good job.

I haven't had any problem mixing ARC with non-ARC. It's just a little annoying 
to have to edit the build flags of individual source files.

The upgrade tool is nice, but in a big project it can take a fair amount of 
work to get all the code ready to convert (i.e. fix all the issues raised by 
the converter) and then track down residual memory issues afterwards.

That said, I'd never go back to writing non-ARC code (unless forced to.)

—Jens

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