How to shape the container?

问题:

I want to make different shape of a container in flutter. For example, shaping the container to have a shape of octagonal, etc.

Thank you in advance.

回答1:

You can extend CustomClipper and define a custom path to be used with ClipPath. There are other pre-made clip widgets like ClipOval and ClipRRect (a rectangle with rounded corners). The below is an example of a star-shaped Container.

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ClipPath(
        child: Container(
          color: Colors.amber,
        ),
        clipper: _MyClipper(),
      ),
    );
  }
}

class _MyClipper extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    final path = Path();
    path.lineTo(size.width * 0.5, size.height * 0.15);
    path.lineTo(size.width * 0.35, size.height * 0.4);
    path.lineTo(0.0, size.height * 0.4);
    path.lineTo(size.width * 0.25, size.height * 0.55);
    path.lineTo(size.width * 0.1, size.height * 0.8);
    path.lineTo(size.width * 0.5, size.height * 0.65);
    path.lineTo(size.width * 0.9, size.height * 0.8);
    path.lineTo(size.width * 0.75, size.height * 0.55);
    path.lineTo(size.width, size.height * 0.4);
    path.lineTo(size.width * 0.65, size.height * 0.4);
    path.lineTo(size.width * 0.5, size.height * 0.15);

    path.close();
    return path;
  }

  @override
  bool shouldReclip(CustomClipper<Path> oldClipper) => false;
}