iOS开发中的高版本宏检测

在框架开发中，为了适配最低的系统版本，我们需要注意不使用高版本API。但除了个人注意之外，是否可以在编译时由系统提示超出兼容版本的API使用情况呢，

观察了CF_AVAILABLE_IOS宏之后，我们给出了如下解决方案，即更改iOS SDK。具体方案如下：

添加位置： Frameworks-> CoreFoundation -> CFAvalailability.h line 115  添加代码：

/* added by Mitty */

#define __NEP_2_0 availability(ios,introduced=2.0)

#define __NEP_2_1 availability(ios,introduced=2.1)

#define __NEP_2_2 availability(ios,introduced=2.2)

#define __NEP_3_0 availability(ios,introduced=3.0)

#define __NEP_3_1 availability(ios,introduced=3.1)

#define __NEP_3_2 availability(ios,introduced=3.2)

#define __NEP_4_0 availability(ios,introduced=4.0)

#define __NEP_4_1 availability(ios,introduced=4.1)

#define __NEP_4_2 availability(ios,introduced=4.2)

#define __NEP_4_3 availability(ios,introduced=4.3)

#define __NEP_5_0 availability(ios,introduced=5.0)

#define __NEP_5_1 availability(ios,introduced=5.1)

#define __NEP_6_0 availability(ios,introduced=6.0)

#define __NEP_6_1 deprecated("API version newer than iOS6.0")

#define __NEP_7_0 deprecated("API version newer than iOS6.0")

#define __NEP_7_1 deprecated("API version newer than iOS6.0")

#define __NEP_8_0 deprecated("API version newer than iOS6.0")

#define __NEP_8_1 deprecated("API version newer than iOS6.0")

#define __NEP_8_2 deprecated("API version newer than iOS6.0")

#define __NEP_8_3 deprecated("API version newer than iOS6.0")

#define __NEP_9_0 deprecated("API version newer than iOS6.0")

#define __NEP_9_1 deprecated("API version newer than iOS6.0")

#define __NEP_10_0 deprecated("API version newer than iOS6.0")

#define __NEP_10_1 deprecated("API version newer than iOS6.0")

#define __NEP_10_2 deprecated("API version newer than iOS6.0")

#define __NEP_10_3 deprecated("API version newer than iOS6.0")

#define __NEP_10_4 deprecated("API version newer than iOS6.0")

#define __NEP_10_5 deprecated("API version newer than iOS6.0")

#define __NEP_10_6 deprecated("API version newer than iOS6.0")

#define __NEP_10_7 deprecated("API version newer than iOS6.0")

#define __NEP_10_8 deprecated("API version newer than iOS6.0")

#define __NEP_10_9 deprecated("API version newer than iOS6.0")

#define __NEP_10_10 deprecated("API version newer than iOS6.0")

#define CF_AVAILABLE_IOS(_ios)

__attribute__((,__NEP_##_ios))

/* added by Mitty End */