# iOS常用宏定义 原文地址： * 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 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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