On 12 Nov 2012, at 14:18, Joerg Simon <j_si...@mac.com> wrote:

> You can use dispatch_sync. The blog post of oliver dobnigg (cocoanetics) 
> summs that up quite nicely:
> http://www.cocoanetics.com/2012/02/threadsafe-lazy-property-initialization/

Or you can use dispatch_once, but make sure the once token is an ivar, unlike I 
did.

Tom Davie
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