Problem Statement
What are the main components of a Scaffold widget and how do you use them to build a screen?
Explanation
Scaffold's appBar property accepts a PreferredSizeWidget like AppBar, typically containing a title, leading widget (usually back button), and actions (icon buttons). AppBar is the standard top bar in Material Design apps showing screen title and navigation/action buttons. It automatically handles system status bar padding and material elevation.
The body property contains the main content of your screen, accepting any widget. This is where you place your primary UI like lists, forms, or custom layouts. Scaffold automatically handles safe area padding for system UI elements like notches and navigation bars. The body is placed below the app bar and above bottom navigation if present.
FloatingActionButton (FAB) is a circular button typically used for primary actions, positioned using floatingActionButtonLocation (default bottom right). BottomNavigationBar provides tab navigation at the bottom with BottomNavigationBarItem items. Drawer and endDrawer create slide-in side menus from left and right edges respectively, containing navigation items.
Other useful properties include backgroundColor for scaffold background color, resizeToAvoidBottomInset to control resizing when keyboard appears, and snackbar/persistentFooterButtons for additional UI elements. Scaffold coordinates these components automatically, handling layout, safe areas, and Material motion. Understanding Scaffold structure is fundamental to building Material Design apps in Flutter.
