小编Nai*_*hul的帖子

我正在尝试向小部件添加验证器：

import 'package:flutter/material.dart';
    import 'package:flutter_app_1/utils/routes.dart';
    
    class LoginPage extends StatefulWidget {
      @override
      _LoginPageState createState() => _LoginPageState();
    }
    
    class _LoginPageState extends State<LoginPage> {
      String name = "";
      bool changeButton = false;
    
      final _formKey = GlobalKey<FormState>();
    
      moveToHome(BuildContext context) async {
        if (_formKey.currentState.validate()) {
          setState(() {
            changeButton = true;
          });
          await Future.delayed(Duration(seconds: 1));
          await Navigator.pushNamed(context, MyRoutes.homeRoute);
          setState(() {
            changeButton = false;
          });
        }
      }
    
      @override
      Widget build(BuildContext context) {
        return Material(
            color: Colors.white,
            child: SingleChildScrollView(
              child: Form(
                key: _formKey,
                child: Column(
                  children: [
                    Image.asset( …