` //判断字符串是否为空

define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )

//判断数组是否为空

define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)

//判断字典是否为空

define kDictionaryIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)

//弱引用，强引用

define kWeakSelf(type) __weak typeof(type) weak##type = type;

define kStrongSelf(type) __strong typeof(type) type = weak##type;

//一些常用方法的宏定义

define kApplication [UIApplication sharedApplication]

define kKeyWindow [UIApplication sharedApplication].keyWindow

define kAppDelegate [UIApplication sharedApplication].delegate

define kUserDefaults [NSUserDefaults standardUserDefaults]

define kNotificationCenter [NSNotificationCenter defaultCenter]

//APP 版本号

define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]

//系统版本号

define kSystemVersion [[UIDevice currentDevice] systemVersion]

define kSystemVersionGreaterThanOrEqualTo(v)(v) (［[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

define kSystemVersionLessThanOrEqualTo(v)(v) (［[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)

//获取当前语言

define kCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])

//是否为Iphone

define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

//是否为Ipad

define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

//是否为retina屏幕

define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), ［UIScreen mainScreen] currentMode].size) : NO)

//判断真机还是模拟器

if TARGET_OS_IPHONE

//真机

endif

if TARGET_IPHONE_SIMULATOR

//模拟器

endif

//获取沙盒路径

define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]

//沙盒temp路径

define kTempPath NSTemporaryDirectory()

//沙盒cache路径

define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]

//获取时间间隔

define kStartTime CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();

define kEndTime NSLog(@"Time: %f", CFAbsoluteTimeGetCurrent() - start)

////////////////////////////////////////////////UI 相关
//判断是否为空对象

define kObjectIsEmpty(_object) (_object == nil \

|| [_object isKindOfClass:[NSNull class]]
|| ([_object respondsToSelector:@selector(length)] && [(NSData *)_object length] == 0)
|| ([_object respondsToSelector:@selector(count)] && [(NSArray *)_object count] == 0))

//获取屏幕的宽，高，sizi

define kScreenWidth \

([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.width)

define kScreenHeight \

([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.height)

define kScreenSize \

([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? CGSizeMake([UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale,[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale) : [UIScreen mainScreen].bounds.size)

//颜色相关

define kRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]

define kRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]

define kRandomColor KRGBColor(arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0) //随机色生成

define kColorWithHex(rgbValue,a) \

[UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16)) / 255.0
green:((float)((rgbValue & 0xFF00) >> 8)) / 255.0
blue:((float)(rgbValue & 0xFF)) / 255.0 alpha: a]

//角度转弧度

define kDegreesToRadian(x) (M_PI * (x) / 180.0)

//弧度转角度

define kRadianToDegrees(radian) (radian * 180.0) / (M_PI)`