Xamarin Controllers and Navigation

Xamarin provides various types of controllers that can be used to create a user interface for mobile applications. Navigation controllers are used to manage the flow between different screens of an application. In this page, we will discuss the different types of controllers and how to use navigation in Xamarin.

Types Of Controllers

Xamarin provides the following types of controllers:

• UIViewController: This is the base class for all view controllers in Xamarin. It defines the basic interface for managing a view hierarchy, and it is responsible for loading and unloading views.

• UITabBarController: This controller is used to display a tab bar at the bottom of the screen, which can be used to switch between different screens.

• UINavigationController: This controller is used to manage a navigation stack of view controllers. It provides a navigation bar at the top of the screen that can be used to navigate between different screens.

• UIPageViewController: This controller is used to manage a collection of pages, where each page represents a separate screen in the application.

Navigation

Navigation in Xamarin is performed using the navigation controller, which manages a stack of view controllers. The navigation controller provides a navigation bar at the top of the screen, which can be used to navigate between different screens.

The following code can be used to push a new view controller onto the navigation stack:

this.NavigationController.PushViewController(new MyViewController(), true);

When a new view controller is pushed onto the stack, it becomes the active view controller. To pop a view controller off the stack, the following code can be used:

this.NavigationController.PopViewController(true);

Important Points

• View controllers are the primary way to manage the user interface in Xamarin.

• Navigation controllers are used to manage a stack of view controllers, providing a navigation bar for easy navigation.

• Xamarin provides several types of controllers, each with its own purpose and functionality.

Summary

Xamarin controllers provide the foundation for building a mobile application's user interface. Navigation controllers provide an easy way to manage a stack of view controllers and provide a navigation bar for easy navigation between screens. Using these controllers, developers can build powerful mobile applications that are both easy to use and easy to navigate.