flutter画一个底边半椭圆

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import 'package:flutter/material.dart';

class MyClipper extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    var path = Path();
    path.lineTo(0, size.height - 50);
    path.quadraticBezierTo(
        size.width / 2, size.height, size.width, size.height - 50);
    path.lineTo(size.width, 0);
    path.close();
    return path;
  }

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

效果

Screenshot_2020-05-26-17-02-45-360_shop.itbug.dem.jpg
显示高度可微调50值