ios开发--常用宏定义(部分转)

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ios开发--常用宏定义(部分转)
1、release时，屏蔽log
C代码

#if defined (DEBUG) && DEBUG == 1



#else

#define NSLog(...) {};

#endif
```
#if defined (DEBUG) && DEBUG == 1

#else
#define NSLog(...) {};
#endif
```
2、在主线程或在后台执行block
C代码

#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、设备相关
C代码

#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、区分模拟器和真机
C代码

#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、根据是否使用ARC做不同操作
C代码

#if __has_feature(objc_arc)

    //compiling with ARC

#else

    // compiling without ARC

#endif
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原文地址：https://www.cnblogs.com/lovewx/p/4380833.html