Error when migrating from swift 2.3 to swift 3 - swift

Question

I just want to try Swift 3.0 in one of my projects and It is working fine in Swift 2.Xcode Version 8.3.1
Everything I fixed but getting error in FXForm library.Below is the error I am getting at the time of project compilation:
"_OBJC_CLASS_$__TtCC13Test11AppDelegate15FXFormVariables", referenced from:
objc-class-ref in FXForms.o
error: linker command failed with exit code 1 (use -v to see invocation)
I had passed the logged in user validation from App delegate like below:
//objective C class
#objc class loggedinUser : NSObject {
class func isUserLoggedIn() -> Bool { return userLoggedin! }
}
and used it in Objective-C class of FXForm like below:
if([loggedinUser isUserLoggedIn] == true){
// default to bottom
return CGPointMake(self.bounds.size.width/2, (self.bounds.size.height - (toast.frame.size.height / 2)) - style.verticalPadding - 120);
}
Please help in fixing the above error and thanks in advance.

Answer 1

This isn't a Swift 2 to Swift 3 refactoring problem.
It's a problem where you need to make sure the FXForms .m file is being compiled in your project. Do you include the .h & .m files in your project?
Go to the file inspector (the list of files in the left side) of your Xcode window, click on the FXForms.m file and make sure "Target Membership" is checked, like in the right red circle of this screenshot: