您可以使用以下命令将数字指定 为
keyboardType
for the TextField using:
keyboardType: TextInputType.number
检查我的main.dart文件
import 'package:flutter/material.dart';void main() => runApp(new MyApp());class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { // TODO: implement build return new MaterialApp( home: new HomePage(), theme: new ThemeData(primarySwatch: Colors.blue), ); }}class HomePage extends StatefulWidget { @override State<StatefulWidget> createState() { return new HomePageState(); }}class HomePageState extends State<HomePage> { @override Widget build(BuildContext context) { return new Scaffold( backgroundColor: Colors.white, body: new Container( padding: const EdgeInsets.all(40.0), child: new Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ new TextField( decoration: new InputDecoration(labelText: "Enter your number"), keyboardType: TextInputType.number, inputFormatters: <TextInputFormatter>[ WhitelistingTextInputFormatter.digitsOnly], // only numbers can be entered ), ], )), ); }}
