ios常使用的宏定义

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项目中经常有一些重复使用的代码，有时我们会将其宏定义，以便快捷使用。

1.RGB颜色值转换成UIColor对象

//颜色转换#define Color(r,g,b,a) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]

2.十六进制颜色转换成UIColor对象

#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

3.判断设备和屏幕

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)#define IS_RETINA ([[UIScreen mainScreen] scale] >= 2.0)//获取屏幕 宽度、高度#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))#define SCREEN_MIN_LENGTH (MIN(SCREEN_WIDTH, SCREEN_HEIGHT))#define IS_IPHONE_4_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH < 568.0)#define IS_IPHONE_5 (IS_IPHONE && SCREEN_MAX_LENGTH == 568.0)#define IS_IPHONE_5_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH <= 568.0)#define IS_IPHONE_6 (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)

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