What is segue?
Segue is a concept primarily used in Apple's <a href="https://www.wikiwhat.page/kavramlar/iOS%20Development">iOS Development</a> using the Swift or Objective-C programming languages. It represents a transition between two view controllers in a storyboard. Think of it as a visual connection that defines how one screen (view controller) navigates to another.
Key aspects of segues include:
- Visual Representation: In a storyboard, segues are depicted as arrows connecting different <a href="https://www.wikiwhat.page/kavramlar/View%20Controllers">View Controllers</a>.
- Type: Different types of segues determine the style of transition. Common types include:
- Show: (Formerly Push) This is often used for pushing a new view controller onto a navigation stack.
- Modal: Presents a view controller modally (e.g., as a pop-up).
- Present as Popover: Presents a view controller as a popover.
- Replace: Replaces the content of a container view.
- Custom: Allows developers to implement their own custom transition animations.
- Identifier: A unique string assigned to a segue, allowing it to be referenced in code. This is how you distinguish between different segues originating from the same view controller.
- Data Passing: Segues can be used to pass data between view controllers. The
prepare(for segue: UIStoryboardSegue, sender: Any?) method is where you typically set up the destination view controller with the necessary data before the transition occurs.
- Triggering a Segue: Segues can be triggered in several ways:
- Programmatically: Using
performSegue(withIdentifier:sender:) in code.
- From Interface Builder: By connecting UI elements (like buttons or table view cells) directly to the segue.
- Unwind Segues: These allow you to navigate backwards through a navigation stack to a specific view controller. This is a way to dismiss presented view controllers or navigate back from pushed controllers, possibly passing data backward in the process.
Segues simplify navigation and view controller management in iOS apps, making it easier to create complex user interfaces with multiple screens.