How can I use a preprocessor macro in a method declaration?

Question

I'm shifting between Xcode 6 and 7 quite frequently, and want a way to avoid build warnings like this one.

Conflicting return type in implementation of 'supportedInterfaceOrientations': 'UIInterfaceOrientationMask' (aka 'enum UIInterfaceOrientationMask') vs 'NSUInteger' (aka 'unsigned long')

I can't seem to use a type that will satisfy both versions of Xcode simultaneously. So I was going to implement a preprocessor macro which had different values depending on the value of __IPHONE_9_0.

#ifdef __IPHONE_9_0
#define CompatibilityUserInterfaceMask  UIInterfaceOrientationMask
#else
#define CompatibilityUserInterfaceMask  NSUInteger
#endif

When I try and implement this though I get a build error.

- (CompatibilityUserInterfaceMask)supportedInterfaceOrientations { ... }

Is this possible, or does anyone have other ideas to achieve the same outcome?

Oscar Hierro · Accepted Answer · 2015-08-11 09:22:34Z

2

As far as I can tell your macro should just work, but if you want a slightly different approach (arguably uglier):

#if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000  
- (NSUInteger)supportedInterfaceOrientations  
#else  
- (UIInterfaceOrientationMask)supportedInterfaceOrientations  
#endif

answered Aug 11, 2015 at 9:22

Oscar Hierro

1,1071 gold badge10 silver badges16 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How can I use a preprocessor macro in a method declaration?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related