import 'package:flutter/material.dart'; // 提示信息, 组件右上角的小红点 class Badged extends StatelessWidget { final String? badge; final Widget child; const Badged({Key? key, required this.child, this.badge}) : super(key: key); @override Widget build(BuildContext context) { if (badge == null) { return child; } return Stack( children: [ child, Positioned( right: 0, child: Container( padding: const EdgeInsets.all(1), decoration: BoxDecoration( color: Colors.red, borderRadius: BorderRadius.circular(6), ), constraints: const BoxConstraints( minWidth: 12, minHeight: 12, ), child: Text( badge!, style: const TextStyle( color: Colors.white, fontSize: 8, ), textAlign: TextAlign.center, ), ), ), ], ); } }