ios - Is there a macro that denotes the iOS SDK version against which the code is compiled?

Question

I.e., is it possible to know if my code is compiled under SDK 5.1, or 6.0, or any other version?

Answer 1

#ifdef __IPHONE_6_0
    // Will be ignored when compiled under SDK 5.1
#endif

When you are compiling under iOS SDK 5.1 or any other older SDK there is no #define for __IPHONE_6_0, so checking if the macro is defined helps to check the SDK version.

Answer 2

查看 iOS SDK 中的“ Availability.h”和“ AvailabilityInternal.h”文件，您会看到可以使用的条件。我链接到的 Apple OpenSource（我在这个密切相关的问题中找到）与您在 SDK 中找到的不同。

例如，我看到“ __IPHONE_OS_VERSION_MIN_REQUIRED”的定义，如果您只想在 iOS 6 及更高版本上编译此代码，您必须确保将其设置为“ __IPHONE_6_0”。