iOS开发中常用的宏

• 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; }