／／设备型号
#define IS_IPAD     [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad
#define IS_IPHONE   [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone
#define IS_IPHONE_4 (fabs((double)[[UIScreen mainScreen] bounds].size.height - (double )480) < DBL_EPSILON )
#define IS_IPHONE_5 (fabs((double)[[UIScreen mainScreen] bounds].size.height - (double )568) < DBL_EPSILON )
#define IS_IPHONE_6 (fabs((double)[[UIScreen mainScreen] bounds].size.height - (double )667) < DBL_EPSILON )
#define IS_IPHONE_6_PLUS (fabs((double)[[UIScreen mainScreen] bounds].size.height - (double )960) < DBL_EPSILON )

／／系统版本
#define IS_IOS_VERSION   floorf([[UIDevice currentDevice].systemVersion floatValue]
#define IS_IOS_5    floorf([[UIDevice currentDevice].systemVersion floatValue]) ==5.0 ? 1 : 0
#define IS_IOS_6    floorf([[UIDevice currentDevice].systemVersion floatValue]) ==6.0 ? 1 : 0
#define IS_IOS_7    floorf([[UIDevice currentDevice].systemVersion floatValue]) ==7.0 ? 1 : 0
#define IS_IOS_8    floorf([[UIDevice currentDevice].systemVersion floatValue]) ==8.0 ? 1 : 0
#define IS_IOS_9    floorf([[UIDevice currentDevice].systemVersion floatValue]) ==9.0 ? 1 : 0

／／物理屏幕尺寸
#define IH_DEVICE_HEIGHT    [[UIScreen mainScreen] bounds].size.height
#define IH_DEVICE_WIDTH     [[UIScreen mainScreen] bounds].size.width

／／自定义的NSLog
方法一：简单粗暴
#ifdef DEBUG    //调试
#define XBYLog(...) NSLog(__VA_ARGS__)
#else   //发布
#define XBYLog(...)
#endif

方法二：高端一些
#ifdef DEBUG
#define XLog(FORMAT, ...) fprintf(stderr,"%s:%d\t%s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);
#else
#define XLog(FORMAT, ...) nil;
#endif
方法三：
#ifdef DEBUG
#define XBYLog(format, ...) NSLog((@"%s  " "%s  " "%d行  " format), [[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#define XBYLog(FORMAT, ...) nil;
#endif

//基于自定义Log的打印函数名
#define XBYFunc XBYLog(@"%s",__func__)

#endif