iOS开发常用宏

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#define RELEASE(obj) { [obj release]; obj = nil; }

//是否arc

#if ! __has_feature(objc_arc)

[xxx release];

#endif

//判断是真机还是模拟器

#if TARGET_OS_IPHONE

//iPhone Device

#endif

#if TARGET_IPHONE_SIMULATOR

//iPhone Simulator

#endif

///是否iPad

#define IPAD UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad

///是否iPhone

#define IPHONE UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone

///版本

#define VERSION [[[UIDevice currentDevice] systemVersion] floatValue]

///是否 ios7

#define IOS7 (VERSION>=7.0)

//return 1pt所占px

#define SCALE ([UIScreen mainScreen].scale)

///系统屏幕大小

#define WIN_SIZE ([UIScreen mainScreen].bounds.size)

//是否Retina屏

#define IS_Retina (SCALE>=2.0)

///颜色

#define COLOR_RGB(r,g,b,a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:a]

//返回angle(float) degrees(360)

#define angleForDegrees(degrees) (M_PI * (degrees) / 180.0)

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