IOS version

versions.m

/*
 *  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)


/*
 * Font Family with Size Macro
 */ 
 
 
#define FONT_Bebas_STD(s) [UIFont fontWithName:@"Bebas" size:s]
 
 
/*
 *  Usage
 */ 

  myLabel.font =FONT_Bebas_STD(70.0f);//[UIFont fontWithName:@"Bebas" size:80.0];
 
if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
    ...
}
 
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"3.1.1")) {
    ...
}