Flutter FloatingActionButton

      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Navigator.push(
            context,
            MaterialPageRoute(builder: 
            (context) => PostWritePage()),
          );
        },
        backgroundColor: Color(0xFF033B0B),
        child: Icon(
          CupertinoIcons.plus,
          color: Colors.white,
        ),
      )
    

• 결과물
  

• 버튼 누르면 어디로 이동하게끔 해주게 하는 코드

onPressed: () {
          Navigator.push(
            context,
            MaterialPageRoute(builder: 
            (context) => PostWritePage()),
          );
        },