objective c - Nullable specifier syntax -

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i've got property. declaration follows:

 @property (nonatomic, copy) nsstring* inputroute;

the compiler whining @ me lack of nullability specifier have used elsewhere. original attempt 

 @property (nonatomic, copy) nullable nsstring* inputroute;

which matches syntax used method arguments. unfortunately, compiler gave syntax error. subsequently moved forward 1 token @ time until right @ end , compiler threw syntax error.

where supposed put make compiler shut up?

@property (nonatomic, copy, nullable) nsstring *string1; @property (nonatomic, copy, nonnull) nsstring *string2;

see nullability , optionals in using swift cocoa , objective-c (swift 2)


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