iOS常用宏 定义

iOS开发过程中，使用的一些常用宏定义

• 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)
  

• 是否是空对象

  #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))
  

• 获取屏幕宽度与高度 ( " \ ":连接行标志，连接上下两行 )

  //屏宽
  #define kScreenWidth \
  ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.width)
  //屏高
  #define kScreenHeight \
  ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.height)
  //屏的size(宽、高)
  #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)
  

• 一些常用的缩写：

  //APP对象 （单例对象）
  #define kApplication [UIApplication sharedApplication]
  //主窗口 （keyWindow）
  #define kKeyWindow [UIApplication sharedApplication].keyWindow
  //APP对象的delegate
  #define kAppDelegate [UIApplication sharedApplication].delegate
  //NSUserDefaults实例化
  #define kUserDefaults [NSUserDefaults standardUserDefaults]
  //通知中心 （单例对象）
  #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]
  

• 获取当前语言

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

• 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)
  

• 获取沙盒的Document路径

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

• 获取沙盒的temp路径

  #define kTempPath NSTemporaryDirectory()
  

• 获取沙盒的Cache路径

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

• 判断是真机还是模拟器

  #if TARGET_OS_IPHONE
  //真机
  #endif
  #if TARGET_IPHONE_SIMULATOR
  //模拟器
  #endif
  

• 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

  //RGB格式
  #define kRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
  
  //RGBA格式 （A：alpha）
  #define kRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
  
  //随机色生成
  #define kRandomColor KRGBColor(arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0) 
  
  //16进制形式
  #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]
  

• 弱引用/强引用

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

• 由角度转换为弧度

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

• 由弧度转换为角度

  #define kRadianToDegrees(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)
  

• 宏(指令)定义

  #ifndef MacroDefinition_h  //如果没定义
  
  #define MacroDefinition_h