#ifdef #else #endif choose iOS sdk version and function?

Question

I am buliding a dark themed iOS 6 and 7 app. I understand I can call [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; to make

Answer 1

While I'm not 100% sure I can fully answer this without breaching NDA, I'll do my best to point you in the right direction.

You need to use the __IPHONE_* #defines in Availability.h

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_6_0
  // iOS 6+ code here
#else
  // Pre iOS 6 code here
#endif

Please be aware that #if and #ifdef will determine what code is compiled, it is not a runtime detection mechanism.

You can easily access Availability.h by using Open Quickly and typing in Availability.

Answer 2

take a look to respondsToSelector

 [delegate respondsToSelector:@selector(myMethod:)]