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Some useful iOS/Objective-C Macros
#define ApplicationDelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])
#define UserDefaults [NSUserDefaults standardUserDefaults]
#define NotificationCenter [NSNotificationCenter defaultCenter]
#define SharedApplication [UIApplication sharedApplication]
#define Bundle [NSBundle mainBundle]
#define MainScreen [UIScreen mainScreen]
#define ShowNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = YES
#define HideNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = NO
#define NetworkActivityIndicatorVisible(x) [UIApplication sharedApplication].networkActivityIndicatorVisible = x
#define NavBar self.navigationController.navigationBar
#define TabBar self.tabBarController.tabBar
#define NavBarHeight self.navigationController.navigationBar.bounds.size.height
#define TabBarHeight self.tabBarController.tabBar.bounds.size.height
#define ScreenWidth [[UIScreen mainScreen] bounds].size.width
#define ScreenHeight [[UIScreen mainScreen] bounds].size.height
#define TouchHeightDefault 44
#define TouchHeightSmall 32
#define ViewWidth(v) v.frame.size.width
#define ViewHeight(v) v.frame.size.height
#define ViewX(v) v.frame.origin.x
#define ViewY(v) v.frame.origin.y
#define SelfViewWidth self.view.bounds.size.width
#define SelfViewHeight self.view.bounds.size.height
#define RectX(f) f.origin.x
#define RectY(f) f.origin.y
#define RectWidth(f) f.size.width
#define RectHeight(f) f.size.height
#define RectSetWidth(f, w) CGRectMake(RectX(f), RectY(f), w, RectHeight(f))
#define RectSetHeight(f, h) CGRectMake(RectX(f), RectY(f), RectWidth(f), h)
#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 RectSetSize(f, w, h) CGRectMake(RectX(f), RectY(f), w, h)
#define RectSetOrigin(f, x, y) CGRectMake(x, y, RectWidth(f), RectHeight(f))
#define DATE_COMPONENTS NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit
#define TIME_COMPONENTS NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit
#define FlushPool(p) [p drain]; p = [[NSAutoreleasePool alloc] init]
#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 HEXCOLOR(c) [UIColor colorWithRed:((c>>16)&0xFF)/255.0 green:((c>>8)&0xFF)/255.0 blue:(c&0xFF)/255.0 alpha:1.0];
@jurezove

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commented Oct 17, 2012

You could add an alpha parameter to HEXCOLOR:

define HEXCOLOR(c, a) [UIColor colorWithRed:((c>>16)&0xFF)/255.0 green:((c>>8)&0xFF)/255.0 blue:(c&0xFF)/255.0 alpha:a];

@StephaneP

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commented Jun 14, 2013

great macros thanks

@zongren

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commented Jul 24, 2016

nice macros,really helpful

@aterribili

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commented Aug 8, 2016

very nice. Thanks for share 😄

@jkryanchou

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commented Sep 7, 2016

Very nice macros it would do helpful for me

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