Flutter中FormBuilderValidators未定义错误求助

你遇到的错误如下：

lib/screens/create_account_screen.dart:30:30: Error: The getter 'FormBuilderValidators' isn't defined for the class '_CreateAccountScreenState'.
 - '_CreateAccountScreenState' is from 'package:myapp/screens/create_account_screen.dart' ('lib/screens/create_account_screen.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'FormBuilderValidators'.
                  validator: FormBuilderValidators.compose([

尽管已引入flutter_form_builder: ^9.1.0依赖并执行flutter pub get，仍出现该错误，可按以下步骤解决：

• 补充必要的导入语句
  在flutter_form_builder 9.x版本中，FormBuilderValidators需要单独导入，你当前的代码仅导入了基础包，需添加：

  import 'package:flutter_form_builder/flutter_form_builder_validators.dart';
  

• 修正Validator的调用格式
  9.x版本的API做了调整，部分验证方法不再需要传递context参数，修正后的代码示例：

  // Email输入框
  FormBuilderTextField(
    name: 'email',
    decoration: InputDecoration(labelText: 'Email'),
    validator: FormBuilderValidators.compose([
      FormBuilderValidators.required(),
      FormBuilderValidators.email(),
    ]),
  ),
  // 手机号输入框
  FormBuilderTextField(
    name: 'phone',
    decoration: InputDecoration(labelText: 'Phone Number'),
    validator: FormBuilderValidators.compose([
      FormBuilderValidators.required(),
      FormBuilderValidators.phone(),
    ]),
  ),
  // 密码输入框
  FormBuilderTextField(
    name: 'password',
    decoration: InputDecoration(
      labelText: 'Password',
      suffixIcon: IconButton(
        icon: Icon(_isPasswordVisible
            ? Icons.visibility
            : Icons.visibility_off),
        onPressed: _togglePasswordVisibility,
      ),
    ),
    obscureText: !_isPasswordVisible,
    validator: FormBuilderValidators.compose([
      FormBuilderValidators.required(),
      FormBuilderValidators.minLength(6),
    ]),
  ),
  

• 重新同步依赖
  执行以下命令确保依赖完全生效：

  flutter clean
  flutter pub get
  

内容的提问来源于stack exchange，提问作者thebiggestlebowski