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() {
  // ignore: no_logic_in_create_state, https://github.com/flutter/flutter/issues/70499
  return switch (mode) {
    // The `time` mode and `dateAndTime` mode of the picker share the time
    // columns, so they are placed together to one state.
    // The `date` mode has different children and is implemented in a different
    // state.
    PersianCupertinoDatePickerMode.time =>
      _CupertinoDatePickerDateTimeState(),
    PersianCupertinoDatePickerMode.dateAndTime =>
      _CupertinoDatePickerDateTimeState(),
    PersianCupertinoDatePickerMode.date =>
      _CupertinoDatePickerDateState(dateOrder: dateOrder),
    PersianCupertinoDatePickerMode.monthYear =>
      _CupertinoDatePickerMonthYearState(dateOrder: dateOrder),
  };
}