util.h

/**
 * UIStoryboard (InstantiateViewController)
 */
UIKIT_STATIC_INLINE __kindof UIViewController *InstantiateViewControllerOnStoryboard(NSString *storyboardName, NSString *identifier) {
    return [[UIStoryboard storyboardWithName:storyboardName bundle:nil] instantiateViewControllerWithIdentifier:identifier];
}
UIKIT_STATIC_INLINE __kindof UIViewController *InstantiateInitialViewControllerOnStoryboard(NSString *storyboardName) {
    return [[UIStoryboard storyboardWithName:storyboardName bundle:nil] instantiateInitialViewController];
}


/**
 * UIColor (Macro)
 */
#define RGB(r, g, b)     [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1.0f]
#define RGBA(r, g, b, a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:a]


/**
 * switch (Macro)
 */
#define CASE(str) if ([__s__ isEqualToString:(str)])
#define SWITCH_BY_STRING(s) for (NSString *__s__ = (s); ; )
#define DEFAULT