Flutter Listview 主题标签显示更多问题

Question

有可能与颤动有关吗？ 许多主题标签来自数据库。如果hashtags长度超过3个，那个时候+10more按钮就会出现，而我们点击按钮。它将展开以显示所有主题标签。请检查我的两张图片，你会明白的。

第一张图片 first image

第二张图片

second image

Answer 1

是的，有可能！

这是一个简单的例子：

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<String> _hashtags = ["Flutter", "Dart", "Google"];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Container(
              color: Colors.grey,
              height: 50,
              child: ListView.builder(
                itemCount: _hashtags.length,
                scrollDirection: Axis.horizontal,
                itemBuilder: (context, index) {
                  return Padding(
                    padding: const EdgeInsets.all(3.0),
                    child: Text("#${_hashtags[index]}"),
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

Interactive example

输出示例：