I downloaded a project from GitHub, then pod the following files, some of which are written by OBJ-C and I used a bridge header.
pod ‘SnapKit’ pod ‘MJRefresh
You can try this solution. I have solved the same problem by this way.
Product > Scheme > Edit Scheme > Select "Build" on Left Menu > Find implicit dependencies
Under the build tab, check 'Find implicit dependencies':
Then make a clean and build again.