Flutter密码输入插件reactive_pin_input_text_field的使用

Flutter密码输入插件reactive_pin_input_text_field的使用

reactive_pin_input_text_field 是一个围绕 pin_input_text_field 构建的包装器，用于与 reactive_forms 配合使用。目前文档还在编写中。你可以查看 example 文件夹中的示例代码来了解如何使用它。

示例代码

以下是一个完整的示例代码，展示了如何在 Flutter 应用程序中使用 reactive_pin_input_text_field 插件。

import 'package:flutter/material.dart';
import 'package:reactive_forms/reactive_forms.dart';
import 'package:reactive_pin_input_text_field/reactive_pin_input_text_field.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // 定义表单组
  FormGroup buildForm() => fb.group({
        'input': FormControl<String>(value: null), // 控制器
      });

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: Scaffold(
        appBar: AppBar(),
        body: SafeArea(
          child: SingleChildScrollView(
            physics: const BouncingScrollPhysics(),
            padding: const EdgeInsets.symmetric(
              horizontal: 20.0,
              vertical: 20.0,
            ),
            child: ReactiveFormBuilder(
              form: buildForm,
              builder: (context, form, child) {
                return Column(
                  children: [
                    // 使用ReactivePinInputTextField组件
                    ReactivePinInputTextField<String>(
                      formControlName: 'input', // 绑定到表单控制器
                    ),
                    const SizedBox(height: 16),
                    ElevatedButton(
                      child: const Text('Sign Up'), // 按钮文本
                      onPressed: () {
                        if (form.valid) { // 验证表单
                          // 打印表单值
                          print(form.value);
                        } else {
                          form.markAllAsTouched(); // 触发所有控件验证
                        }
                      },
                    ),
                  ],
                );
              },
            ),
          ),
        ),
      ),
    );
  }
}

代码解释

1. 导入必要的包：

   import 'package:flutter/material.dart';
   import 'package:reactive_forms/reactive_forms.dart';
   import 'package:reactive_pin_input_text_field/reactive_pin_input_text_field.dart';
   

2. 定义主应用类：

   void main() {
     runApp(const MyApp());
   }
   
   class MyApp extends StatelessWidget {
     const MyApp({super.key});
   

3. 构建表单组：

   FormGroup buildForm() => fb.group({
         'input': FormControl<String>(value: null),
       });
   

4. 构建应用程序UI：

   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       theme: ThemeData(
         primarySwatch: Colors.blue,
         visualDensity: VisualDensity.adaptivePlatformDensity,
       ),
       home: Scaffold(
         appBar: AppBar(),
         body: SafeArea(
           child: SingleChildScrollView(
             physics: const BouncingScrollPhysics(),
             padding: const EdgeInsets.symmetric(
               horizontal: 20.0,
               vertical: 20.0,
             ),
             child: ReactiveFormBuilder(
               form: buildForm,
               builder: (context, form, child) {
                 return Column(
                   children: [
                     ReactivePinInputTextField<String>(
                       formControlName: 'input',
                     ),
                     const SizedBox(height: 16),
                     ElevatedButton(
                       child: const Text('Sign Up'),
                       onPressed: () {
                         if (form.valid) {
                           print(form.value);
                         } else {
                           form.markAllAsTouched();
                         }
                       },
                     ),
                   ],
                 );
               },
             ),
           ),
         ),
       ),
     );
   }