031 Mapping Lists to Widgets

Описание: Dart basic
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In Flutter, you can use various widgets to display a collection of items stored in a list. To display a list of items as a scrollable list, you can use the ListView widget.

To map a list of items to a collection of widgets, you can use the ListView.builder() method. This method takes in two properties:

itemCount: An integer representing the number of items in the list.
itemBuilder: A callback function that takes in a BuildContext object and an integer representing the current index of the item being built. It returns a widget that displays the item at the current index.
Inside the itemBuilder function, you can use the current index to access the item from the list, and create a widget that displays the item. You can use any Flutter widget to display the item, depending on the requirements of your application.

The ListView.builder() method is a more efficient way to display a large number of items in a list. This is because it only creates the widgets that are currently visible on the screen, and creates new widgets as needed when the user scrolls through the list.

Overall, mapping a list of items to a collection of widgets in Flutter is a simple process, and allows you to easily display a list of items in your application.