Flutter步骤导航插件cool_stepper的使用

简介

cool_stepper 是一个Flutter插件，用于显示分步骤的操作流程。它在表单向导或引导页面中非常有用。

使用方法

添加依赖

在你的 pubspec.yaml 文件中添加 cool_stepper 作为依赖：

dependencies:
  cool_stepper: ^1.0.0

然后在你的Dart文件中导入 cool_stepper：

import 'package:cool_stepper/cool_stepper.dart';

示例

以下是一个完整的示例代码，展示了如何使用 cool_stepper 插件创建一个多步骤表单：

import 'package:cool_stepper/cool_stepper.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Cool Stepper',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        fontFamily: GoogleFonts.poppins().fontFamily,
      ),
      debugShowCheckedModeBanner: false,
      home: MyHomePage(title: 'Cool Stepper'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, this.title}) : super(key: key);

  final String? title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final _formKey = GlobalKey<FormState>();
  String? selectedRole = 'Writer';
  final TextEditingController _nameCtrl = TextEditingController();
  final TextEditingController _emailCtrl = TextEditingController();

  @override
  Widget build(BuildContext context) {
    final steps = [
      CoolStep(
        title: 'Basic Information',
        subtitle: 'Please fill some of the basic information to get started',
        content: Form(
          key: _formKey,
          child: Column(
            children: [
              _buildTextField(
                labelText: 'Name',
                validator: (value) {
                  if (value!.isEmpty) {
                    return 'Name is required';
                  }
                  return null;
                },
                controller: _nameCtrl,
              ),
              _buildTextField(
                labelText: 'Email Address',
                validator: (value) {
                  if (value!.isEmpty) {
                    return 'Email address is required';
                  }
                  return null;
                },
                controller: _emailCtrl,
              ),
            ],
          ),
        ),
        validation: () {
          if (!_formKey.currentState!.validate()) {
            return 'Fill form correctly';
          }
          return null;
        },
      ),
      CoolStep(
        title: 'Select your role',
        subtitle: 'Choose a role that better defines you',
        content: Container(
          child: Row(
            children: <Widget>[
              _buildSelector(
                context: context,
                name: 'Writer',
              ),
              SizedBox(width: 5.0),
              _buildSelector(
                context: context,
                name: 'Editor',
              ),
            ],
          ),
        ),
        validation: () {
          return null;
        },
      ),
    ];

    final stepper = CoolStepper(
      showErrorSnackbar: false,
      onCompleted: () {
        print('Steps completed!');
      },
      steps: steps,
      config: CoolStepperConfig(
        backText: 'PREV',
      ),
    );

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title!),
      ),
      body: Container(
        child: stepper,
      ),
    );
  }

  Widget _buildTextField({
    String? labelText,
    FormFieldValidator<String>? validator,
    TextEditingController? controller,
  }) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 20.0),
      child: TextFormField(
        decoration: InputDecoration(
          labelText: labelText,
        ),
        validator: validator,
        controller: controller,
      ),
    );
  }

  Widget _buildSelector({
    BuildContext? context,
    required String name,
  }) {
    final isActive = name == selectedRole;

    return Expanded(
      child: AnimatedContainer(
        duration: Duration(milliseconds: 200),
        curve: Curves.easeInOut,
        decoration: BoxDecoration(
          color: isActive ? Theme.of(context!).primaryColor : null,
          border: Border.all(
            width: 0,
          ),
          borderRadius: BorderRadius.circular(8.0),
        ),
        child: RadioListTile(
          value: name,
          activeColor: Colors.white,
          groupValue: selectedRole,
          onChanged: (String? v) {
            setState(() {
              selectedRole = v;
            });
          },
          title: Text(
            name,
            style: TextStyle(
              color: isActive ? Colors.white : null,
            ),
          ),
        ),
      ),
    );
  }
}

CoolStepper 类

CoolStepperConfig 属性

希望这个示例对你有所帮助！如果你有任何问题或需要进一步的帮助，请随时提问。