ios 开发中常用的宏

/** 获得颜色*/
#define kGetColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1]

/** 导航栏默认高度*/
#define NavigationBar_HEIGHT 44

/** 整个屏幕的宽度*/
#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)

/** 整个屏幕的宽度*/
#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)

/** 判断系统版本*/
#define IOS_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]

/** 判断当前系统版本*/
#define CurrentSystemVersion ([[UIDevice currentDevice] systemVersion])

//判断是否大于 IOS7
#define IS_IOS7 SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")

/** 判断当前系统版本*/
#define CurrentSystemVersion ([[UIDevice currentDevice] systemVersion])


//判断是否是iphone5
#define IS_WIDESCREEN                              ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - (double)568 ) < __DBL_EPSILON__ )
#define IS_IPHONE                                  ( [ [ [ UIDevice currentDevice ] model ] isEqualToString: @"iPhone" ] || [ [ [ UIDevice currentDevice ] model ] isEqualToString: @"iPhone Simulator" ])
#define IS_IPOD                                    ( [ [ [ UIDevice currentDevice ] model ] isEqualToString: @"iPod touch" ] )
#define IS_IPHONE_5                                ( IS_IPHONE && IS_WIDESCREEN )

//判断字符串是否为空
#define IFISNIL(v)                                 (v = (v != nil) ? v : @"")
//判断NSNumber是否为空
#define IFISNILFORNUMBER(v)                        (v = (v != nil) ? v : [NSNumber numberWithInt:0])
//判断是否是字符串
#define IFISSTR(v)                                 (v = ([v isKindOfClass:[NSString class]]) ? v : [NSString stringWithFormat:@"%@",v])



/** 判断当前系统语言*/
#define CurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])

/** use dlog to print while in debug model*/
#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define DLog(...)
#endif


#define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
#define iPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)
#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)


#if TARGET_OS_IPHONE
//iPhone Device
#endif

#if TARGET_IPHONE_SIMULATOR
//iPhone Simulator
#endif


//ARC
#if __has_feature(objc_arc)
//compiling with ARC
#else
// compiling without ARC
#endif


/**
    G－C－D
*/

/** 异步任务*/
#define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)
/** 回到主线程*/
#define MAIN(block) dispatch_async(dispatch_get_main_queue(),block)


#define USER_DEFAULT [NSUserDefaults standardUserDefaults]
#define ImageNamed(_pointer) [UIImage imageNamed:[UIUtil imageName:_pointer]]



#pragma mark - common functions
#define RELEASE_SAFELY(__POINTER) { [__POINTER release]; __POINTER = nil; }


#pragma mark - degrees/radian functions
#define degreesToRadian(x) (M_PI * (x) / 180.0)
#define radianToDegrees(radian) (radian*180.0)/(M_PI)

#pragma mark - color functions
#define RGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]
#define RGBACOLOR(r,g,b,a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]
#define ITTDEBUG
#define ITTLOGLEVEL_INFO     10
#define ITTLOGLEVEL_WARNING  3
#define ITTLOGLEVEL_ERROR    1

#ifndef ITTMAXLOGLEVEL

#ifdef DEBUG
#define ITTMAXLOGLEVEL ITTLOGLEVEL_INFO
#else
#define ITTMAXLOGLEVEL ITTLOGLEVEL_ERROR
#endif

#endif

// The general purpose logger. This ignores logging levels.
#ifdef ITTDEBUG
#define ITTDPRINT(xx, ...)  NSLog(@"%s(%d): " xx, __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)
#else
#define ITTDPRINT(xx, ...)  ((void)0)
#endif

// Prints the current method's name.
#define ITTDPRINTMETHODNAME() ITTDPRINT(@"%s", __PRETTY_FUNCTION__)

// Log-level based logging macros.
#if ITTLOGLEVEL_ERROR <= ITTMAXLOGLEVEL
#define ITTDERROR(xx, ...)  ITTDPRINT(xx, ##__VA_ARGS__)
#else
#define ITTDERROR(xx, ...)  ((void)0)
#endif

#if ITTLOGLEVEL_WARNING <= ITTMAXLOGLEVEL
#define ITTDWARNING(xx, ...)  ITTDPRINT(xx, ##__VA_ARGS__)
#else
#define ITTDWARNING(xx, ...)  ((void)0)
#endif

#if ITTLOGLEVEL_INFO <= ITTMAXLOGLEVEL
#define ITTDINFO(xx, ...)  ITTDPRINT(xx, ##__VA_ARGS__)
#else
#define ITTDINFO(xx, ...)  ((void)0)
#endif

#ifdef ITTDEBUG
#define ITTDCONDITIONLOG(condition, xx, ...) { if ((condition)) { 
ITTDPRINT(xx, ##__VA_ARGS__); 
} 
} ((void)0)
#else
#define ITTDCONDITIONLOG(condition, xx, ...) ((void)0)
#endif

#define ITTAssert(condition, ...)                                       
do {                                                                      
if (!(condition)) {                                                     
[[NSAssertionHandler currentHandler]                                  
handleFailureInFunction:[NSString stringWithUTF8String:__PRETTY_FUNCTION__] 
file:[NSString stringWithUTF8String:__FILE__]  
lineNumber:__LINE__                                  
description:__VA_ARGS__];                             
}                                                                       
} while(0)



#define _po(o) DLOG(@"%@", (o))
#define _pn(o) DLOG(@"%d", (o))
#define _pf(o) DLOG(@"%f", (o))
#define _ps(o) DLOG(@"CGSize: {%.0f, %.0f}", (o).width, (o).height)
#define _pr(o) DLOG(@"NSRect: {{%.0f, %.0f}, {%.0f, %.0f}}", (o).origin.x, (o).origin.x, (o).size.width, (o).size.height)

#define DOBJ(obj)  DLOG(@"%s: %@", #obj, [(obj) description])

#define MARK    NSLog(@"
MARK: %s, %d", __PRETTY_FUNCTION__, __LINE__)