ios開發--常用宏定義(部分轉)，ios

ios開發--常用宏定義(部分轉)，ios

1、release時，屏蔽log

C代碼  

#if defined (DEBUG) && DEBUG == 1  

  

#else  

#define NSLog(...) {};  

#endif  

#if defined (DEBUG) && DEBUG == 1#else#define NSLog(...) {};#endif

 

2、在主線程或在後台執行block

C代碼  

#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)  

#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)

 

3、裝置相關

 

C代碼  

#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)  

  

#define CurrentSystemVersion ([[UIDevice currentDevice] systemVersion])  

  

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

#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)#define CurrentSystemVersion ([[UIDevice currentDevice] systemVersion])#define CurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0]) 

 

4、區分模擬器和真機

C代碼  

#if TARGET_OS_IPHONE  

//iPhone Device  

#endif  

  

#if TARGET_IPHONE_SIMULATOR  

//iPhone Simulator  

#endif  

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

 

5、根據是否使用ARC做不同操作

C代碼  

#if __has_feature(objc_arc)  

    //compiling with ARC  

#else  

    // compiling without ARC  

#endif