Objetive-C useful Macro

UsefulMacro.h

//source : http://blog.csdn.net/yiya1989/article/details/7849588
#define myprintf(...) printk("[lch]:File:%s, Line:%d, Function:%s," \  
    __VA_ARGS__, __FILE__, __LINE__ ,__FUNCTION__);
    
//source : http://stackoverflow.com/questions/969130/how-to-print-out-the-method-name-and-line-number-and-conditionally-disable-nslog
#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)
#else
#   define DLog(...)
#endif

// ALog always displays output regardless of the DEBUG setting
#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

//The output (e.g. ALog(@"Hello world") ) will look like this:
//-[LibraryController awakeFromNib] [Line 364] Hello world

//source : https://gist.github.com/numo16/3407652
#pragma mark - Shared Instance
#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
#pragma mark - Nav, Tab Controller
#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
#pragma mark - UI Tool
#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]
#pragma mark - Color Tool
#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];

// IOS Version check
// Source : http://stackoverflow.com/questions/7848766/how-can-we-programmatically-detect-which-ios-version-is-device-running-on
#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)
// Usage :
//if (SYSTEM_VERSION_LESS_THAN(@"5.0")) {
//    // code here
//}
//
//if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.0")) {
//    // code here
//}