iOS import header files in different system version in iOS 10.0

Question

It is always true , and I don`t know how to work it, it is emergency, please have a look at https://i.stack.imgur.com/WoGt0.png

Answer 1

if defined(__IPHONE_10_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0)

import

@interface AppController ()

else

@interface AppController ()

endif