iOSでバージョンのチェックをいろいろ行いたかったので、便利なマクロを探してみた。Check iPhone iOS Version – Stack Overflowから。これを.pchファイルに記述すると便利。
/* * System Versioning Preprocessor Macros */ #define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame) #define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending) #define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending) #define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending) #define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending) /* * Usage */ if (SYSTEM_VERSION_LESS_THAN(@'4.0')) { ... } if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@'3.1.1')) { ... } |