iOS中常用的宏定义

判断真机还是模拟器运行代码

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

系统版本

#define IOS8_OR_LATER ([[UIDevice currentDevice].systemVersion doubleValue] >= 8.0)

颜色宏定义

#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 HEXCOLOR(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]

屏幕尺寸

#define SCREEN_HEIGHT [[UIScreen mainScreen] bounds].size.height
#define SCREEN_WIDTH  [[UIScreen mainScreen] bounds].size.width

自定义打印

#ifdef DEBUG
#define JSLog(FORMAT, ...) fprintf(stderr,"%s:%d\t%s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);
#else
#define JSLog(FORMAT, ...) nil
#endif

本地保存

#define JSDefault [NSUserDefaults standardUserDefaults]

空对象判断

//是否为空或是[NSNull null]
#define NotNilAndNull(_ref)  (((_ref) != nil) && (![(_ref) isEqual:[NSNull null]]))
#define IsNilOrNull(_ref)   (((_ref) == nil) || ([(_ref) isEqual:[NSNull null]]))
//字符串是否为空
#define IsStringEmpty(_ref)    (((_ref) == nil) || ([(_ref) isEqual:[NSNull null]]) ||([(_ref)isEqualToString:@""]))
//数组是否为空
#define IsArrayEmpty(_ref)    (((_ref) == nil) || ([(_ref) isEqual:[NSNull null]]) ||([(_ref) count] == 0))

线程执行方法

#define Foreground_Begin  dispatch_async(dispatch_get_main_queue(), ^{
#define Foreground_End    });

#define Background_Begin  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{\
                                @autoreleasepool {
#define Background_End          }\
                          });

宏判断ARC和非ARC

#if __has_feature(objc_arc)  
// ARC
#else  
// 非ARC
#endif  

角度和弧度转化

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

用宏创建一个类的单例

#undef  AS_SINGLETON
#define AS_SINGLETON( __class ) \
+ (__class *)sharedInstance;

#undef  DEF_SINGLETON
#define DEF_SINGLETON( __class ) \
+ (__class *)sharedInstance \
{ \
static dispatch_once_t once; \
static __class * __singleton__; \
dispatch_once( &once, ^{ __singleton__ = [[__class alloc] init]; } ); \
return __singleton__; \
}

防止循环引用的强弱指针

#define WeakSelf(type)  __weak typeof(type) weak##type = type;
#define StrongSelf(type)  __strong typeof(type) type = weak##type;

设置UIView圆角

#define ViewBorderRadius(View, Radius, Width, Color)\
\
[View.layer setCornerRadius:(Radius)];\
[View.layer setMasksToBounds:YES];\
[View.layer setBorderWidth:(Width)];\
[View.layer setBorderColor:[Color CGColor]]

角度弧度互转

#define DegreesToRadian(x) (M_PI * (x) / 180.0)
#define RadianToDegrees(radian) (radian*180.0)/(M_PI)

沙盒目录

//获取temp#define kPathTemp NSTemporaryDirectory()//获取沙盒 Document#define kPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]//获取沙盒 Cache#define kPathCache [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]

未完，待续。。。