iOS常用判断的宏定义：系统版本号，屏幕宽高，设备型号, 自定义NSLog

／／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_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

define IS_IOS_10 floorf([[UIDevice currentDevice].systemVersion floatValue]) ==10.0 ? 1 : 0

define IS_IOS_11 floorf([[UIDevice currentDevice].systemVersion floatValue]) ==11.0 ? 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

ifdef DEBUG

define XSLog(FORMAT, ...) fprintf(stderr,"%s:%d\t%s\n",[[[NSString stringWithUTF8String:FILE] lastPathComponent] UTF8String], LINE, [[NSString stringWithFormat:FORMAT, ##VA_ARGS] UTF8String]);

define YYLog(FORMAT, ...) fprintf(stderr,"%s:%d\t%s\n",[[[NSString stringWithUTF8String:FILE] lastPathComponent] UTF8String], LINE, [[NSString stringWithFormat:FORMAT, ##VA_ARGS] UTF8String]);

else

define XSLog(FORMAT, ...) nil;

define YYLog(FORMAT, ...) nil;

endif

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