gistfile1.txt

// in the swift part 

extension MyObjectiveCClass {
  func myFunctionInSwift(){
    println("this is running in Swift")
  }
}

//On the objective C Side

// MyObjectiveCClass.m 
#import "MyobjectiveCClass.h"
#import Module_Name-Swift.h 
//if you do not import your files in this order you will get a compiler error 

@implementation MyObjectiveCClass : SuperClassDefinition

-(void)callSwiftFunction{
  [self myFunctionInSwift]; //"this is running in swift"
}
@end