In my XIB Sample code, the file owner is TrainViewController and WritingViewController is added into the XIB as shown in the picture below. and the IBOUTLET "Sign" from TrainViewController is connected to WritingViewController. Note: i annotated wrongly on the picture should be TrainViewController instead of TrainingViewController. So in my Storyboard which i am trying to replicate the same code, i created two view controller scene which is TrainViewController as well as WritingViewController. I am unable to link the IBOUTLET "Sign" to WritingViewController as i believe they are not "link" like in the XIB sample code where the WritingViewController is in the same XIB as the TrainViewController. what should i do?