A segue is a transition from one controller to another. In the same way, a storyboard file is a collection of controllers and their views attached together by segues. This, in turn, allows you to see the layouts of each controller and the general flow of your application at the same time.
There are just a few categories of segue, which are as follows:
Push: This is used within a navigation controller. It pushes a new controller to the top of the navigation controller's stack. Push uses the standard animation technique for navigation controllers and is generally the most commonly used segue.
Relationship: This is used to set a child controller for another controller. For example, the root controller of a navigation controller, container views, or split view controllers in an iPad application.
Modal: On using this, a controller presented modally will appear on top of the parent controller. It will cover the entire screen until dismissed. There are several types of...