[Flutter] Scroll To Top 버튼

  final ScrollController _scrollController = ScrollController();

  void _scrollToTop() {
    _scrollController.animateTo(0,
        duration: const Duration(milliseconds: 750), curve: Curves.ease);
  }
 
 // ScrollView의 controller 속성에 추가
  SingleChildScrollView(
          controller: _scrollController,
          ...
          ),
          
 // Top 버튼 in Column 
  Padding(
  padding: const EdgeInsets.all(margin16),
  child: Align(
    alignment: Alignment.centerRight,
    child: SizedBox(
      width: 50,
      height: 50,
      child: MaterialButton(
        onPressed: () {
          _scrollToTop();
        },
        color: Colors.grey,
        splashColor: Colors.black,
        child: const Text("TOP",
            style: TextStyle(
              color: Colors.white,
              fontSize: 16,
            )),
        padding: const EdgeInsets.all(8),
        shape: const CircleBorder(),
      ),
    ),
  ),
),