createState method

@override State<StatefulWidget> createState()

Creates the mutable state for this widget at a given location in the tree.

Subclasses should override this method to return a newly created instance of their associated State subclass:

@override
State<SomeWidget> createState() => _SomeWidgetState();

The framework can call this method multiple times over the lifetime of a StatefulWidget. For example, if the widget is inserted into the tree in multiple locations, the framework will create a separate State object for each location. Similarly, if the widget is removed from the tree and later inserted into the tree again, the framework will call createState again to create a fresh State object, simplifying the lifecycle of State objects.

Implementation

@override
State<StatefulWidget> createState() {
  List<Map> jsonList = codes;

  List<CountryPicked> elements = jsonList
      .map((s) => CountryPicked(
            countryName: s['name'],
            countryExtension: s['code'],
            countryCode: s['dial_code'],
            //flagImage: 'assets/flags/${s['code']}.svg',
          ))
      .toList();

  return _CountryPicker(elements);
}