升级XCode8编译报错：“Module file was created by an older version of the compiler”

升级XCode8编译报错：“Module file was created by an older version of the compiler” ，rebuild "XXX(第三方库名)"and try again":

原因：Frameworks中swift版本会是固定的，升级到需要第三方把库用XCode8编译一下。

While your app’s runtime compatibility is ensured, the Swift language itself will continue to evolve, and the binary interface will also change. To be safe, all components of your app should be built with the same version of Xcode and the Swift compiler
to ensure that they work together.
http://stackoverflow.com/questions/32626309/module-file-was-created-by-an-older-version-of-the-compiler-message-when-tryin https://developer.apple.com/swift/blog/?id=2