iOS經常使用宏定義大全

一 基本用法

 1.宏定義須要加括號的兩種狀況:

   (1)若是宏的替換列表中帶有運算符,那麼使用要將替換列表放到括號中。例如#define MAX_VALUE(X,Y) ((X) > (Y) ? (X) : (Y))

   (2)若是宏有參數,每次參數在替換列表中出現時都要放在括號中。同上

#define MAX_VALUE(X,Y) ((X) > (Y) ? (X) : (Y)) // 求兩個數中的最大值

 

 2.#運算符和##運算符

 (1)出如今宏定義中的#運算符把跟在其後的參數轉換成一個字符串。有時把這種用法的#稱爲字符串化運算符。例如：

 #define PASTE(n) "adhfkj"#n
 main()
 {
 printf("%s\n",PASTE(15));

 }

 宏定義中的#運算符告訴預處理程序，把源代碼中任何傳遞給該宏的參數轉換成一個字符串。因此輸出應該是adhfkj15。

 

針對Window,dos,os2不一樣的系統對WIDTH進行不一樣的定義

單獨一行的#是空指令

#ifdef WINDOWS
#
#define WIDTH 375
#
#elif defined(DOS)
#
#define WIDTH 414
#
#elif defined(OS)
#
#define WIDTH 320
#
#else
#
//#error no sysytem;
#

#endif

 (2)##運算符用於把參數鏈接到一塊兒。預處理程序把出如今##兩側的參數合併成一個符號。看下面的例子：

 #define NUM(a,b,c) a##b##c
 #define STR(a,b,c) a##b##c
 main()
 {
 printf("%d\n",NUM(1,2,3));
 printf("%s\n",STR("aa","bb","cc"));
 }
 最後程序的輸出爲:
 123
 aabbcc

 

#define IMAGE_NAME(NAME) @"image_name"#NAME  // IMAGE_NAME(3)=image_name3

#define STR(NAME,AGE,SEX) @"名字:"#NAME@".年齡:"#AGE@".性別:"#SEX // 名字:@「王五".年齡:24.性別:@"男"

 

 3.取消宏定義

 #undef NUM1

 

 4.複雜宏的定義

#define NSLOG_ARRAY_OR_DICT(ARRAY,DICT) (NSLog(@"array = %@,dict = %@",[(ARRAY) description],[(DICT) description]));
// 設計技巧:dowhile中出現;
#define NSLOG_ARRAY_OR_DICT2(ARRAY,DICT) do {int a = 1;NSLog(@"a = %d",a);NSLog(@"array = %@,dict = %@",[(ARRAY) description],[(DICT) description]);}while(0)

 

5.條件編譯 args...表示有多個參數

(1)打印信息

#define DEBUG 1
#if DEBUG
#define MY_NSLog(fmt,args...) NSLog(@fmt,##args)
#else
#define MY_NSLog(fmt,args...)

#endif

 

 

二 經常使用宏定義

 

ZBConst.h      宏定義文件集合(包含如下宏定義)==>

 

ZBHttpConst.h  網絡相關宏定義(推薦用const常量代替)

ZBNotificationConst.h 通知相關宏定義(推薦用const常量代替)

ZBDeviceConst.h   系統相關宏定義

ZBStringConst.h     字符串相關宏定義

ZBDefineConst.h     自定義宏

 

 

1.系統相關宏定義

/** 1.設備狀態條,導航欄,tabbar高度 */
#define ZB_HEIGHT_STATUSBAR     20.f // 狀態條高度
#define ZB_HEIGHT_NAVIGATIONBAR 44.f // 導航欄高度
#define ZB_HEIGHT_TABBAR        49.f // tabbar高度

/** 2.設備屏幕寬度和高度(支持橫屏) */
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 // 當前Xcode支持iOS8及以上
#define ZB_SCREEN_WIDTH ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.width)
#define ZB_SCREEN_HEIGHT ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.height)
#define ZB_SCREEN_SIZE ([[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)
#else
#define ZB_SCREEN_WIDTH     [UIScreen mainScreen].bounds.size.width
#define ZB_SCREEN_HEIGHT    [UIScreen mainScreen].bounds.size.height
#define ZB_SCREEN_SIZE      [UIScreen mainScreen].bounds.size
#endif

/**
 *  3.設備類型
 *  設備屏幕高度:IPHONE4(iPhone4,iPhone4s)480;IPHONE5(iPhone5,iPhone5s)568;IPHONE6 667;IPHONE6PLUS 736.
 *  EPSILON是最小偏差,DBL_EPSILON是雙浮點型(double)最小偏差,是EPSILON+X不等於X的最小的正數
 */
#if TARGET_IPHONE_SIMULATOR // 模擬器
#define IPHONE4             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )480 ) < DBL_EPSILON )
#define IPHONE5             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )568 ) < DBL_EPSILON )
#define IPHONE6             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )667 ) < DBL_EPSILON )
#define IPHONE6PLUS         ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )736 ) < DBL_EPSILON )
#elif TARGET_OS_IPHONE // 真機
#define IPHONE4             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )480 ) < DBL_EPSILON )
#define IPHONE5             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )568 ) < DBL_EPSILON )
#define IPHONE6             ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )667 ) < DBL_EPSILON )
#define IPHONE6PLUS         ( fabs( ( double )[ [ UIScreen mainScreen ] bounds ].size.height - ( double )736 ) < DBL_EPSILON )
#endif
// 判斷是否爲iPhone
#define ZB_IS_IPHONE           (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
// 判斷是否爲iPad
#define ZB_IS_IPAD             (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
// 判斷是否爲ipod
#define ZB_IS_IPOD             ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])


/**
 *  4.設備系統版本
 */
#define iOS6_LATER          ([[UIDevice currentDevice].systemVersion floatValue] >= 6.0)
#define iOS7_LATER          ([[UIDevice currentDevice].systemVersion floatValue] >= 7.0)
#define iOS8_LATER          ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0)
#define iOS9_LATER          ([[UIDevice currentDevice].systemVersion floatValue] >= 9.0)
#define iOS7_0              ([[UIDevice currentDevice].systemVersion floatValue] == 7.0)
#define iOS7_1              ([[UIDevice currentDevice].systemVersion floatValue] == 7.1)
#define iOS8_0              ([[UIDevice currentDevice].systemVersion floatValue] == 8.0)
#define iOS8_1              ([[UIDevice currentDevice].systemVersion floatValue] == 8.1)
#define iOS8_2              ([[UIDevice currentDevice].systemVersion floatValue] == 8.2)
#define iOS8_3              ([[UIDevice currentDevice].systemVersion floatValue] == 8.3)
#define iOS9_0              ([[UIDevice currentDevice].systemVersion floatValue] == 9.0)
#define iOS9_1              ([[UIDevice currentDevice].systemVersion floatValue] == 7.1)

/** 5.獲取temp,沙盒Document,沙盒Cache目錄 */
#define ZB_PATH_TEMP        NSTemporaryDirectory()
#define ZB_PATH_DOCUMENT    [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
#define ZB_PATH_CACHE       [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]

/** 6.ARC/MRC */
#if __has_feature(objc_arc)
// ARC
#else
// MRC

#endif

 

2.自定義宏

 

/** 1.顏色字體 */
#define ZB_COLOR_HEX(x)              ([UIColor colorWithHexColor:(x)])
#define ZB_COLOR(r,g,b)              ([UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:255/255.0])
#define ZB_COLOR_ALPHA(r,g,b,a)      ([UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:(a)])
#define ZB_COLOR_RANDOM              ([UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0])
#define ZB_FONT(x)                   ([UIFont systemFontOfSize:(x)])

/** 2.空值判斷 */
#define ZB_IS_EMPTY_STR(_str)        (((_str) == nil) || ([(_str) isEqual:[NSNull null]]) ||([(_str)isEqualToString:@""]))
#define ZB_IS_EMPTY_ARR(_arr)        (((_arr) == nil) || ([(_arr) isEqual:[NSNull null]]) ||([(_arr) count] == 0))

/** 3.單例 */
// 聲明單例
#undef  ZB_SINGLETON_DEFINE
#define ZB_SINGLETON_DEFINE( __class ) \
+ (__class *)sharedInstance;
// 實現單例
#undef  ZB_SINGLETON_IMPLEMENT
#define ZB_SINGLETON_IMPLEMENT( __class ) \
+ (__class *)sharedInstance \
{ \
static __class * __singleton__ = nil; \
static dispatch_once_t onceToken; \
dispatch_once(&onceToken, ^{ \
__singleton__ = [[__class alloc] init]; \
}); \
return __singleton__; \
}

/** 4.打印日誌 */
#ifdef DEBUG
#define ZBLog(...)  NSLog(__VA_ARGS__)
#define ZB_LOG_INT(N) NSLog(@"%d",(N))
#define ZB_LOG_FLOAT(F) NSLog(@"%f",(F))
#define ZB_LOG_INTEGER(I) NSLog(@"%ld",(long)(I))
#else
#define ZBLog(...)
#define ZB_LOG_INT(N)
#define ZB_LOG_FLOAT(F)
#define ZB_LOG_INTEGER(I)
#endif

/** 5.weakself/strongself */
#define ZB_WEAK_SELF(type)  __weak typeof(type) weak##type = type;
#define ZB_STRONG_SELF(type)  __strong typeof(weak##type) strong##type = weak##type;

/** 6.GCD */
// GCD - 一次性執行
#define ZB_DISPATCH_ONCE_BLOCK(onceBlock) static dispatch_once_t onceToken; dispatch_once(&onceToken, onceBlock);
// GCD - 在Main線程上運行
#define ZB_DISPATCH_MAIN_THREAD(mainQueueBlock) dispatch_async(dispatch_get_main_queue(), mainQueueBlock);
// GCD - 開啓異步線程

#define ZB_DISPATCH_GLOBAL_QUEUE_DEFAULT(globalQueueBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), globalQueueBlock);