Common Macro for iphone/ipad project

Macro.pch

#ifdef __OBJC__
    #import <Foundation/Foundation.h>
    #import <UIKit/UIKit.h>
    #define HEXCOLOR(c) [UIColor colorWithRed:((c>>24)&0xFF)/255.0 \
    green:((c>>16)&0xFF)/255.0 \
    blue:((c>>8)&0xFF)/255.0 \
    alpha:((c)&0xFF)/255.0];
#endif

static inline BOOL isEmpty(id thing) {
    return thing == nil
    || (thing == [NSNull null])
    || ([thing respondsToSelector:@selector(length)]
        && [(NSData *)thing length] == 0)
    || ([thing respondsToSelector:@selector(count)]
        && [(NSArray *)thing count] == 0);
}

#define ALog(format, ...) NSLog((@"%s [L%d] " format), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

#ifdef DEBUG
    #define RSLog(format, ...) ALog(format, ##__VA_ARGS__);
#else  
    #define RSLog(...)  
#endif