iOS Macro

Prefix.pch

// define UIColor macro
#define UIColorRGBMake(r,g,b) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1.0]

// iOS version check macro
#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)

// iOS screen check macro
#define IS_SCREEN_3_5  ([[UIScreen mainScreen] bounds].size.height < 568.0)?YES:NO

// Getting right UIImage and CGImage pixel size according to device display (retina or not)
// http://www.daveoncode.com/2011/10/22/right-uiimage-and-cgimage-pixel-size-retina-display/
// return true if the device has a retina display, false otherwise
#define IS_RETINA_DISPLAY() [[UIScreen mainScreen] respondsToSelector:@selector(scale)] && [[UIScreen mainScreen] scale] == 2.0f

// return the scale value based on device's display (2 retina, 1 other)
#define DISPLAY_SCALE IS_RETINA_DISPLAY() ? 2.0f : 1.0f

// if the device has a retina display return the real scaled pixel size, otherwise the same size will be returned
#define PIXEL_SIZE(size) IS_RETINA_DISPLAY() ? CGSizeMake(size.width/2.0f, size.height/2.0f) : size

// NSLog level
#ifdef DEBUG
    #define DWITRACE( s, ... ) NSLog( @"TRACE - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
    #define DWIDEBUG( s, ... ) NSLog( @"DEBUG - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
    #define DWIINFO( s, ... ) NSLog( @"INFO - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
    #define DWIWARN( s, ... ) NSLog( @"WARN - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
    #define DWIERROR( s, ... ) NSLog( @"ERROR - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
#elif INHOUSE
    #define DWITRACE( s, ... )
    #define DWIDEBUG( s, ... )
    #define DWIINFO( s, ... )
    #define DWIWARN( s, ... ) NSLog( @"WARN - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
    #define DWIERROR( s, ... ) NSLog( @"ERROR - <%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
#else
    #define DWITRACE( s, ... )
    #define DWIDEBUG( s, ... )
    #define DWIINFO( s, ... )
    #define DWIWARN( s, ... )
    #define DWIERROR( s, ... )
#endif