moving data from Model to destination ViewController with segue : I am building a quiz app. The app uses TopicsViewController to select a topic and segue to a QuestionsViewController. The question for the topics are stored as separate swift Objects file. I would like to pick the Topic1 Question file when I press the topic1 button in TopicsViewController to segue into the QuestionsViewController. What I would like to know is how can I select the particular questions file when I select the particular topic upon segueing to the QuestionsViewController? 