006.宏_代码效率

// 屏幕宽度

#define screenWidth [UIScreen mainScreen].bounds.size.width   

// 屏幕高度

#define screenHeight [UIScreen mainScreen].bounds.size.height   

 // 系统版本字符串 

#define Version = [[UIDevice currentDevice] systemVersion]  

// 系统版本value

#define VersionValue = [[[UIDevice currentDevice] systemVersion] floatValue]   

// 获得沙盒路径---其中FilePath为要获得的文件名,其作为宏的参数,调用宏时确定 
#define AccountFilepath(FilePath) [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:(FilePath)]   )
 
// log日志(判断是否是DEBUG)

#ifdef DEBUG

#define YDLog(...) NSLog(__VA_ARGS__)

#else

#define YDLog(...)

#endif

原文地址:https://www.cnblogs.com/juicecoffeetea/p/4701610.html