iOS常用宏定义

原文地址：http://www.jianshu.com/p/56b1a8bd092c

• 判断字符串是否为空

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

• 数组是否为空

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

• 字典是否为空

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

• 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))

• 获取屏幕宽度

  #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)

• 常用的缩写

  #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"]

• 获取当前语言

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

• 获取系统版本

  #define IOS_VERSION ［[UIDevice currentDevice] systemVersion] floatValue]  
  #define CurrentSystemVersion ［UIDevice currentDevice] systemVersion]

• 判断是否为iPhone

  #define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

• 判断是否为ipad

  #define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

• 获取沙盒Document路径

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

• 获取沙盒Cache路径

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

• 开发的时候打印，但是发布的时候不打印的NSLog

  #ifdef DEBUG 
   #define NSLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString     stringWithFormat:__VA_ARGS__])  
   #else   #define NSLog(...)   
   #endif

• 颜色

  #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) \  [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16)) / 255.0 \  green:((float)((rgbValue & 0xFF00) >> 8)) / 255.0 \  blue:((float)(rgbValue & 0xFF)) / 255.0 alpha:1.0]
  
   #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
  
   #define RGBA(r,g,b,a) [UIColor colorWithRed:r/255.0f green:g/255.0f blue:b/255.0f alpha:a]
   #define RGB(r,g,b) RGBA(r,g,b,1.0f)

• 弱引用/强引用

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

• 角度转变成弧度

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

• 由弧度获取角度

  #define radianToDegrees(radian) (radian*180.0)/(M_PI)

• 获取一段时间间隔

  #define kStartTime CFAbsoluteTime start = CFAbsoluteTimeGetCurrent(); 
  #define kEndTime  NSLog(@"Time: %f", CFAbsoluteTimeGetCurrent() - start)

• 判断是否 Retina屏、设备是否为iPone 5、是否是iPad

 #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)

• 比较系统版本

  #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)

• 设置view的tag

  #define VIEWWITHTAG(_OBJECT, _TAG)    [_OBJECT viewWithTag : _TAG]

• 程序的本地化,引用国际化的文件

  #define MyLocal(x, ...) NSLocalizedString(x, nil)

• G-C-D

  #define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)  
  
  #define MAIN(block) dispatch_async(dispatch_get_main_queue(),block)

• 单例化一个类

  #define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \  \  static classname *shared##classname = nil; \  \  + (classname *)shared##classname \  { \  @synchronized(self) \  { \  if (shared##classname == nil) \  { \  shared##classname = ［self alloc] init]; \  } \  } \  \  return shared##classname; \  } \  \  + (id)allocWithZone:(NSZone *)zone \  { \  @synchronized(self) \  { \  if (shared##classname == nil) \  { \  shared##classname = [super allocWithZone:zone]; \  return shared##classname; \  } \  } \  \  return nil; \  } \  \  - (id)copyWithZone:(NSZone *)zone \  { \  return self; \  }  #endif