I added "NSData+CommonCrypto.h" and "NSData+CommonCrypto.m"' for use sha256.
I also add bridging header "chekit-Bridging-Header.h" and I wrote
#import <CommonCrypto/CommonDigest.h>
in the file.
In the building setting, I checked the file is added in Swift compiler - code generation objective-c bridging header.
10 errors occurs when build like above picture: Click here to see my screenshot
Thanks!