initState method

@override @mustCallSuper void initState()

The framework will call this method exactly once. Only when the StateMVC object is first created.

Implementation

@override
@mustCallSuper
void initState() {
  super.initState();
  _scrollController = _BasicScrollController();
  _scrollController.addListener(() {
    // Record the offset with every scroll.
    _lastOffset = _offset;
    _offset = _scrollController.offset;
  });
}