Useful XCode Macros from an iOS developerhttp://orlandoaleman.com

Macros.h

/*
 Macros.h by Orlando Aleman Ortiz <orlando@orlandoaleman.com>
*/

#define ApplicationDelegate                 [[UIApplication sharedApplication] delegate]
#define Bundle                              [NSBundle mainBundle]
#define DATE_COMPONENTS                     NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit
#define DateString                          [NSDateFormatter localizedStringFromDate:[NSDate date] dateStyle:NSDateFormatterShortStyle timeStyle:NSDateFormatterNoStyle]
#define FlushPool(p)                        [p drain]; p = [[NSAutoreleasePool alloc] init]
#define HexAlphaColor(c, a)                 [UIColor colorWithRed:((c>>16)&0xFF)/255.0 green:((c>>8)&0xFF)/255.0 blue:(c&0xFF)/255.0 alpha:a]
#define HexColor(c)                         [UIColor colorWithRed:((c>>16)&0xFF)/255.0 green:((c>>8)&0xFF)/255.0 blue:(c&0xFF)/255.0 alpha:1.0]
#define HideNetworkActivityIndicator()      [UIApplication sharedApplication].networkActivityIndicatorVisible = NO
#define IsNull(v)                           (v == (id)[NSNull null])
#define LString(s)                          NSLocalizedString(s, nil)
#define LS(s)                               NSLocalizedString(s, nil)
#define KeyWindow                           [[UIApplication sharedApplication] keyWindow]
#define MainScreen                          [UIScreen mainScreen]
#define NavBar                              self.navigationController.navigationBar
#define NavBarHeight                        self.navigationController.navigationBar.bounds.size.height
#define NetworkActivityIndicatorVisible(x)  [UIApplication sharedApplication].networkActivityIndicatorVisible = x
#define NilIfNull(v)                        IsNull(v) ? nil : v
#define NullIfNil(v)                        (v ? v : [NSNull null])
#define NotNilArray(a)                      a ? a : @[]
#define NotNullArray(a)                     IsNull(a) ? @[] : a
#define NotNullString(s)                    IsNull(s) ? @"" : s
#define NotNilString(s)                     s ? s : @""
#define NotificationCenter                  [NSNotificationCenter defaultCenter]
#define RGB(r, g, b)                        [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1.0]
#define RGBA(r, g, b, a)                    [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]
#define RectHeight(f)                       f.size.height
#define RectSetHeight(f, h)                 CGRectMake(RectX(f), RectY(f), RectWidth(f), h)
#define RectSetOrigin(f, x, y)              CGRectMake(x, y, RectWidth(f), RectHeight(f))
#define RectSetSize(f, w, h)                CGRectMake(RectX(f), RectY(f), w, h)
#define RectSetWidth(f, w)                  CGRectMake(RectX(f), RectY(f), w, RectHeight(f))
#define RectSetX(f, x)                      CGRectMake(x, RectY(f), RectWidth(f), RectHeight(f))
#define RectSetY(f, y)                      CGRectMake(RectX(f), y, RectWidth(f), RectHeight(f))
#define RectWidth(f)                        f.size.width
#define RectX(f)                            f.origin.x
#define RectY(f)                            f.origin.y
#define ScreenBounds                        [[UIScreen mainScreen] bounds]
#define ScreenHeight                        [[UIScreen mainScreen] bounds].size.height
#define ScreenWidth                         [[UIScreen mainScreen] bounds].size.width
#define SelfViewHeight                      self.view.bounds.size.height
#define SelfViewWidth                       self.view.bounds.size.width
#define SetIfNotNil(VAR, KEY, VALUE)        if (VALUE) VAR[KEY] = VALUE
#define SharedApplication                   [UIApplication sharedApplication]
#define ShowNetworkActivityIndicator()      [UIApplication sharedApplication].networkActivityIndicatorVisible = YES
#define StatusBarHeight                       [[UIApplication sharedApplication] statusBarFrame].size.height
#define SourceFileName                      [[NSString stringWithUTF8String:__FILE__] lastPathComponent]
#define StringClassOfObject(o)              NSStringFromClass([o class])
#define TIME_COMPONENTS                     NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit
#define TabBar                              self.tabBarController.tabBar
#define TabBarHeight                        self.tabBarController.tabBar.bounds.size.height
#define TimeString                          [NSDateFormatter localizedStringFromDate:[NSDate date] dateStyle:NSDateFormatterNoStyle timeStyle:NSDateFormatterMediumStyle]
#define TouchHeightDefault                  44
#define TouchHeightSmall                    32
#define UserDefaults                        [NSUserDefaults standardUserDefaults]
#define ViewHeight(v)                       v.frame.size.height
#define ViewWidth(v)                        v.frame.size.width
#define ViewX(v)                            v.frame.origin.x
#define ViewY(v)                            v.frame.origin.y
#define if_not(VAR, VALUE)                  if (!VAR) { VAR = VALUE; }
#define if_value_assign(VALUE, VAR)         if (VALUE) { VAR = VALUE; }
#define if_return_it(VAR)                   if (VAR) { return VAR; }
#define if_not_return_it(VAR)               if (!VAR) { return VAR; }
#define if_return(VAR)                      if (VAR) { return; }
 
/* DEVICE DETECTING */
#define IS_WIDESCREEN                       (fabs((double)[[UIScreen mainScreen] bounds].size.height - (double)568) < DBL_EPSILON)
#define IS_IPHONE                           ([[[UIDevice currentDevice] model] isEqualToString : @ "iPhone"])
#define IS_IPOD                             ([[[UIDevice currentDevice] model] isEqualToString : @ "iPod touch"])
#define IS_IPHONE_5                         (IS_IPHONE && IS_WIDESCREEN)
#define IOS_VERSION                         [[[[[UIDevice currentDevice] systemVersion] componentsSeparatedByString:@"."] objectAtIndex:0] intValue]
#define IS_IPAD                             [(NSString*)[UIDevice currentDevice].model hasPrefix:@"iPad"]

/* CORE DATA*/
#define InsertEntity(obj, context)          [NSEntityDescription insertNewObjectForEntityForName : NSStringFromClass([obj class]) inManagedObjectContext : context]

/* Warning skip */
#define SuppressPerformSelectorLeakWarning(Stuff) \
                                            do { \
                                                _Pragma("clang diagnostic push") \
                                                _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
                                            Stuff; \
                                                _Pragma("clang diagnostic pop") \
                                            } while (0)

/* Force override*/
#define MustOverride()                      @throw [NSException exceptionWithName:NSInvalidArgumentException \
                                            reason:[NSString stringWithFormat:@"%s must be overridden in a subclass/category", \
                                            __PRETTY_FUNCTION__] userInfo:nil]