小编Paa*_*pta的帖子

为什么此代码不起作用并且未显示底部工作表。我也试过运行代码，但它仍然不起作用。我想在单击按钮时在颤动中显示模态底部工作表。

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  void startInputAction(BuildContext context) {
    showModalBottomSheet(
      context: context,
      builder: (_) {
        return Container(
          height: 200,
          padding: EdgeInsets.all(10),
          child: Text("Something"),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Error Practice Bottom Sheet"),
          backgroundColor: Colors.purple,
        ),
        body: SingleChildScrollView(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              RaisedButton(
                color: Colors.purple,
                padding: EdgeInsets.all(20),
                child: Text("Click here"), …