Prefixheader.pch

#define RGB(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1]
#define HEXCOLOR(c) [UIColor colorWithRed:((float)((c & 0xFF0000) >> 16))/255.0 green:((float)((c & 0xFF00) >> 8))/255.0 blue:((float)(c & 0xFF))/255.0 alpha:1.0]
#define UIColorFromRGB(rgbValue) \
[UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
blue:((float)(rgbValue & 0xFF))/255.0 \
alpha:1.0]

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define IS_RETINA ([[UIScreen mainScreen] scale] >= 2.0)

#define SCREEN_WIDTH ([[UIScreen mainScreen] bounds].size.width)
#define SCREEN_HEIGHT ([[UIScreen mainScreen] bounds].size.height)
#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))
#define SCREEN_MIN_LENGTH (MIN(SCREEN_WIDTH, SCREEN_HEIGHT))

#define IS_IPHONE_4_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH < 568.0)
#define IS_IPHONE_5 (IS_IPHONE && SCREEN_MAX_LENGTH == 568.0)
#define IS_IPHONE_6 (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)
#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)

#define SYSTEM_VERSION                  ([[UIDevice currentDevice] systemVersion])
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([SYSTEM_VERSION compare:v options:NSNumericSearch] != NSOrderedAscending)
#define IS_IOS8_OR_ABOVE  (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0"))
#define IS_IOS7_OR_ABOVE  (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
#define IS_OS_7_OR_EALIER    ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.0)

#define SECOND 1
#define MINUTE (60 * SECOND)
#define HOUR (60 * MINUTE)
#define DAY (24 * HOUR)
#define MONTH (30 * DAY)