objective c - NS_DESIGNATED_INITIALIZER expected : (colon) -

-

i trying declare designated initializer this:

- (instancetype)initwithdelegate:(id <mydelegate>)delegate ns_designated_initializer;

but showing me compilation error:

expected ':'

interestingly when try write (reference link: adopting modern objective-c) -

- (instancetype)init ns_designated_initializer;

it shows error:

expected ';' after method prototype.

any ideas on how use ns_designated_initializer?

ns_designated_initializer macro not defined in library headers xcode 5 - need xcode 6 use it. note link says "pre-release".

the macro defined in following way (quoting nsobjcruntime.h)

#ifndef ns_designated_initializer #if __has_attribute(objc_designated_initializer) #define ns_designated_initializer __attribute__((objc_designated_initializer)) #else #define ns_designated_initializer #endif #endif

note can still use 

- (instancetype)initwithdelegate:(id <mydelegate>)delegate __attribute__((objc_designated_initializer));

in xcode 5 or can add macro explicitly precompiled header.


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