flutter:在文本的最后设置显示更多和显示更少图标

import 'package:flutter/material.dart';

class MyTextWidget extends StatefulWidget {
  @override
  _MyTextWidgetState createState() => _MyTextWidgetState();
}

class _MyTextWidgetState extends State<MyTextWidget> {
  bool isExpanded = false;

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        ExpandableText(
          text: 'Your long text here...',
          isExpanded: isExpanded,
        ),
        GestureDetector(
          onTap: () {
            setState(() {
              isExpanded = !isExpanded;
            });
          },
          child: Icon(
            isExpanded ? Icons.expand_less : Icons.expand_more,
          ),
        ),
      ],
    );
  }
}

class ExpandableText extends StatelessWidget {
  final String text;
  final bool isExpanded;

  ExpandableText({required this.text, required this.isExpanded});

  @override
  Widget build(BuildContext context) {
    return Text(
      text,
      overflow: isExpanded ? null : TextOverflow.ellipsis,
      maxLines: isExpanded ? null : 2,
    );
  }
}