In iOS 9, storyboards can be connected by a \'storyboard reference\' that links to a second storyboard by adding a storyboard reference and setting the \'referenced ID\' to
1) Add this method to your MainViewController
2) In the Main storyboard, right-click on the Exit segue of the referenced storyboard and select // NEEDED! Do not delete!
@IBAction func unwindToMasterViewController(_ segue : UIStoryboardSegue) {
// Do nothing
}unwindToMasterViewController
3) Give the exit segue a name to reference it in code
4) Call your exit segue from code