UI Controller in S60

UI controller is an object derived from either CAknAppUi or CAknViewAppUi, depending on your UI architecture. The UI controller is part of the controller structure in the Model - View - Controller (MVC) design pattern used to design the architecture of many GUI-based mobile applications.

Examples of services and responsibilities provided by the UI controller are as follows:

1. control stack for event handling
2. construction of views for applications
3. the top-level window owning control of the application

The UI controller is implemented in one of the following classes:

1. In a traditional architecture application architecture, the UI controller must be derived from CAknAppUi.
2. In S60 View application architecture, the UI controller must be derived from CAknViewAppUi.
3. In dialog architecture, the UI controller is typically derived from CAknAppUi