I get this error when trying to link may app on iOS:
ld: warning: ignoring file /myProjects/xyz/libchilkatIos.a, file was built for archive which is not the architecture being linked (armv7): libchilkatIos.a
The problem is exactly as stated: You have somehow specified in your XCode project settings to link with a libchilkatIos.a that is for the wrong architecture. For example, perhaps you are building for armv7, but you are trying to link against the libchilkatIos.a for arm64.
The solution is to link against the correct .a that matches your architecture, or to build a universal .a (as shown at http://www.chilkatsoft.com/downloads_ios.asp) and then link with the universal .a
To see the actual architecture of a particular .a static library, you can do this: