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