> On 22 Sep 2016, at 9:44 AM, Gabriel Zachmann <z...@tu-clausthal.de> wrote:
> I have found on the net 

That isn’t always a recommendation ;)

>   if ( context == (__bridge void *) @"mediaLibraryLoaded" )

Don’t do this, even if it appears to work. You got lucky, or are taking 
advantage of undocumented implementation details.

This should be: if([(NSString*)context isEqualToString:@“mediaLibraryLoaded”])…

I expect the first thing -isEqualToString: does is a pointer comparison, so 
it’s unlikely to be significantly less performant for the case of when the 
pointers are literally identical.



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