pod repo push: -Swift.h file not found

My Objective-C projectpod installa SwiftObject, the usage is like this: #import <SwiftObject / SwiftObject-Swift.h> When my project pod repo push, I get an error: Headers / Public / OCObject / Family.h: 10: 9: Error: 'SwiftObject / SwiftObject-Swift.h' file not found ' My podspec file added something like:spec.prefix_header_contents = '# import <SwiftObject / SwiftObject-Swift.h>', but it doesn't seem to work How do I find the file?