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  • iOS-开发中常用的宏有哪些?

    发布:Android培训  来源:Android学习笔记  时间: 2017年04月05日

  • iOS-开发中常用的宏有哪些?...

  • OC对象判断是否为空?

                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))

        UI尺寸类的宏

                状态栏高度

                #define STATUS_BAR_HEIGHT 20

                NavBar导航栏高度

                #define NAVIGATION_BAR_HEIGHT 44

                状态栏 + 导航栏 高度

                #define STATUS_AND_NAVIGATION_HEIGHT ((STATUS_BAR_HEIGHT) + (NAVIGATION_BAR_HEIGHT))

                屏幕 rect

                #define SCREEN_RECT ([UIScreen mainScreen].bounds)
                #define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)
                #define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)
                #define CONTENT_HEIGHT (SCREEN_HEIGHT - NAVIGATION_BAR_HEIGHT - STATUS_BAR_HEIGHT)

                屏幕分辨率

                #define SCREEN_RESOLUTION (SCREEN_WIDTH * SCREEN_HEIGHT * ([UIScreen mainScreen].scale))

        LOG日志打印

                DEBUG 模式下打印日志,当前行

                #ifdef DEBUG
                # define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
                #else
                # define DLog(...)
                #endif

                重写NSLog,Debug模式下打印日志和当前行数

                #if DEBUG
                #define NSLog(FORMAT, ...) fprintf(stderr,"\nfunction:%s line:%d content:%s\n", __FUNCTION__, __LINE__, [NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);
                #else
                #define NSLog(FORMAT, ...) nil
                #endif

                DEBUG 模式下打印日志,当前行 并弹出一个警告

                #ifdef DEBUG
                # define ULog(fmt, ...) { UIAlertView *alert = [UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"%s\n [Line %d] ", __PRETTY_FUNCTION__, __LINE__] message:[NSString stringWithFormat:fmt, ##__VA_ARGS__] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; }
                #else
                # define ULog(...)
                #endif

        判断设备?系统?

                是否iPad

                #define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

                是否iPad

                #define someThing (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)? ipad: iphone

                获取系统版本

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

                判断是否 Retina屏?

                #define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [UIScreen mainScreen] currentMode].size) : NO)

        判断当前的iPhone设备/系统版本

                判断是否为iPhone

                #define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

                判断是否为iPad

                #define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

                判断是否为ipod

                #define IS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])

                判断是否为 iPhone 5SE

                #define iPhone5SE [[UIScreen mainScreen] bounds].size.width == 320.0f && [[UIScreen mainScreen] bounds].size.height == 568.0f

                判断是否为iPhone 6/6s

                #define iPhone6_6s [[UIScreen mainScreen] bounds].size.width == 375.0f && [[UIScreen mainScreen] bounds].size.height == 667.0f

                判断是否为iPhone 6Plus/6sPlus

                #define iPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width == 414.0f && [[UIScreen mainScreen] bounds].size.height == 736.0f

                获取系统版本

                #define IOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]

                判断 iOS 8 或更高的系统版本

                #define IOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))

                判断设备的操做系统是不是ios7

                #define IOS7 ([[UIDevice currentDevice].systemVersion doubleValue] >= 7.0]

                判断是真机还是模拟器

                #if TARGET_OS_IPHONE
                //iPhone Device
                #endif
                #if TARGET_IPHONE_SIMULATOR
                //iPhone Simulator
                #endif

                检查系统版本

                #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)

        定义一个define函数

        #define TT_RELEASE_CF_SAFELY(__REF) { if (nil != (__REF)) { CFRelease(__REF); __REF = nil; } }

        使用ARC和不使用ARC

    #if __has_feature(objc_arc)
    //compiling with ARC
    #else
    // compiling without ARC
    #endif
    #pragma mark - common functions
    #define RELEASE_SAFELY(__POINTER) { [__POINTER release]; __POINTER = nil; }

        释放一个对象

    #define SAFE_DELETE(P) if(P) { [P release], P = nil; }
    #define SAFE_RELEASE(x) [x release];x=nil

        图片相关

        //读取本地图片
        #define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[NSBundle mainBundle]pathForResource:file ofType:ext]
        //定义UIImage对象
        #define IMAGE(A) [UIImage imageWithContentsOfFile:[NSBundle mainBundle] pathForResource:A ofType:nil]
        //定义UIImage对象
        #define ImageNamed(_pointer) [UIImage imageNamed:[UIUtil imageName:_pointer]

        颜色相关

                rgb颜色转换(16进制->10进制)

                #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]

                带有RGBA的颜色设置

                #define COLOR(R, G, B, A) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:A]

                设置随机颜色

                #define LRRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]

                获取RGB颜色

                #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)

                背景色

                #define BACKGROUND_COLOR [UIColor colorWithRed:242.0/255.0 green:236.0/255.0 blue:231.0/255.0 alpha:1.0]

                清除背景色

                #define CLEARCOLOR [UIColor clearColor]
                #pragma mark - color functions
                #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)]

        方正黑体简体字体定义

        #define FONT(F) [UIFont fontWithName:@"FZHTJW--GB1-0" size:F]

        网址相关

                定义一个API

                #define APIURL @"http://xxxxx/"

                登录API

                #define APILogin [APIURL stringByAppendingString:@"Login"]

        设置View的tag属性

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

        语言/国际化相关

                获取当前语言

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

                程序的本地化,引用国际化的文件

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

        线程 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)

        沙盒目录文件

        //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]

        NSUserDefaults 实例化

        #define USER_DEFAULT [NSUserDefaults standardUserDefaults]

        由角度获取弧度 ,由弧度获取角度

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

        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; \

    }

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