I made a good research on this but things failed and in need of help.
When the project started I was the only one working with the project later then another employee has been recruited by our employer to join the project. As we both were new to iOS development we both created new project and started working with that keeping in mind that we could easily merge both the projects into a single module. I have added the second project created by the new employer by dragging and dropping it to project that I have created.but on this code
let _notesViewController = _storyBoard.instantiateViewControllerWithIdentifier("AllNotesViewController") as! AllNotesViewController
an error says use of undeclared type 'AllNotesViewController ' 'AllNotesViewController' is in the second project that I have added into my project. What went wrong ??? Why that error ??? How can I merger two projects into one ???