Flutter高级文本控制插件advance_text

Flutter高级文本控制插件advance_text_controller的使用

插件介绍

advance_text_controller 是一个为管理并格式化各种输入类型（包括日期、时间、模型和数值）提供高级文本编辑控制器的Flutter包。它支持多种类型的输入，如日期、时间、自定义模型和数值。

安装

在 pubspec.yaml 文件中添加以下依赖项：

dependencies:
  advance_text_controller: latest_version

然后通过命令行安装：

flutter pub add advance_text_controller

控制器概述

DateEditingController：用于管理和格式化日期输入，并且可以自定义日期和时间模式。
```
final dateController = DateEditingController(
  dateFormatPattern: 'dd MMM yyyy',
);
```
TimeEditingController：处理时间输入，并且可以自定义格式。

```dart
final timeController = TimeEditingController(
  timeFormatPattern: 'hh:mm a',
);
```

ModelEditingController：支持绑定和更新自定义模型中的文本输入字段。

```dart
final modelController = ModelEditingController&lt;ProductModel&gt;(
  getValue: (model) =&gt; model.name,
  setValue: (model, value) =&gt; model.copyWith(name: value),
);
```

MultiValueEditingController：管理单个字符串键值对，适用于识别多个值。

```dart
final multiValueController = MultiValueEditingController();
```

IntegerEditingController：解析和处理整数输入。

```dart
final integerController = IntegerEditingController();
```

DoubleEditingController：解析和处理双精度输入。

```dart
final doubleController = DoubleEditingController();
```

示例代码

下面是一个完整的示例代码，展示了如何使用 advance_text_controller 插件来管理不同类型的输入：

import 'package:flutter/material.dart';
import 'package:advance_text_controller/advance_text_controller.dart';

class ProductModel {
  final int id;
  final String name;

  ProductModel(this.id, this.name);

  [@override](/user/override)
  String toString() {
    return "ProductModel(id: $id, name: $name)";
  }
}

final productsList = [
  ProductModel(1, "Name 1"),
  ProductModel(2, "Name 2"),
  ProductModel(3, "Name 3"),
];

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

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

  // This widget is the root of your application.
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final stringController = TextEditingController();
  final integerController = IntegerEditingController();
  final doubleController = DoubleEditingController();
  final dateController = DateEditingController();
  final timeController = TimeEditingController();
  final multiValueController = MultiValueEditingController();
  final modelController = ModelEditingController<ProductModel>();

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Advanced Text Editing Controller"),
      ),
      body: SafeArea(
        minimum: const EdgeInsets.symmetric(horizontal: 16),
        child: Column(
          children: [
            const SizedBox(height: 20),
            TextFieldWithLabel(
              controller: stringController,
              label: 'Name',
            ),
            const SizedBox(height: 20),
            TextFieldWithLabel(
              controller: integerController,
              label: 'Age',
            ),
            const SizedBox(height: 20),
            TextFieldWithLabel(
              controller: doubleController,
              label: 'Amount',
            ),
            const SizedBox(height: 20),
            InkWell(
              onTap: () async {
                final result = await showDatePicker(
                  context: context,
                  firstDate: DateTime(2000),
                  lastDate: DateTime(2100),
                  initialDate: DateTime.now(),
                );

                if (result == null) return;

                dateController.setDateTime(result);
              },
              child: TextFieldWithLabel(
                readOnly: true,
                controller: dateController,
                label: 'Date of birth',
              ),
            ),
            const SizedBox(height: 20),
            InkWell(
              onTap: () async {
                final result = await showModalBottomSheet&lt;int?&gt;(
                  context: context,
                  showDragHandle: true,
                  useSafeArea: true,
                  builder: (context) {
                    return Column(
                      children: productList
                          .map((e) =&gt; ListTile(
                                onTap: () =&gt; Navigator.pop(context, e.id),
                                title: Text(e.name),
                              ))
                          .toList(),
                    );
                  },
                );

                if (result == null) return;

                final model = productList.firstWhere((e) =&gt; e.id == result);

                modelController.updateModel(model);

                modelController.text = model.name;
              },
              child: TextFieldWithLabel(
                controller: modelController,
                label: 'Products',
              ),
            ),
            const Spacer(),
            SizedBox(
              width: double.infinity,
              height: 60,
              child: ElevatedButton(
                style: ButtonStyle(
                  backgroundColor: Theme.of(context).colorScheme.inversePrimary,
                ),
                onPressed: () {
                  final name = stringController.text;
                  final age = integerController.numberValue;
                  final amount = doubleController.numberValue;
                  final dob = dateController.dateTime;
                  final model = modelController.model;

                  showModalBottomSheet(
                    context: context,
                    useSafeArea: true,
                    useRootNavigator: true,
                    showDragHandle: true,
                    builder: (context {
                      return Column(
                        children: [
                          Row(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: [
                              Text('Name: $name', style: TextStyle(fontSize: 16)),
                              Text('Data type: ${name.runtimeType}', style: TextStyle(fontSize: 16)),
                            ],
                          ),
                          const SizedBox(height: 20),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: [
                              Text('Age: $age', style: TextStyle(fontSize: 16)),
                              Text('Data type: ${age.runtimeType}', style: TextStyle(fontSize: 16)),
                            ],
                          ),
                          const SizedBox(height:  e0),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: [
                              Text('Amount: $amount', style: TextStyle(fontSize: 16)),
                              Text('Data type: ${amount.runtimeType}', style: TextStyle(fontSize: 16)),
                            ],
                          ),
                          const SizedBox(height:  e0),
                          const SizedBox(height:  e0),
                          Column(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: [
                              Text('Date of birth: $dob', style: TextStyle(fontSize: 16)),
                              Text('Data type: ${dob.runtimeType}', style: TextStyle(fontSize: 16)),
                            ],
                          ),
                          const SizedBox(height:  e0),
                          Column(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: [
                              Text('Product: $model', style: TextStyle(fontSize: 16)),
                              Text('Data type: ${model.runtimeType}', style: TextStyle(fontSize: 16)),
                            ],
                          ),
                        ],
                      );
                    },
                  ),
                ),
                child: const Text('Add'),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class TextFieldWithLabel extends StatelessWidget {
  const TextFieldWithLabel({
    super.key,
    required this.controller,
    required this.label,
    this.readOnly = false,
  });

  final String label;
  final TextEditingController controller;
  final bool readOnly;

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(label),
        TextField(
          readOnly: readOnly,
          controller: controller,
          decoration: InputDecoration(
            hintText: 'Enter $label',
          ),
        ),
      ],
    );
  }
}

更多关于Flutter高级文本控制插件advance_text_controller的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

sinazl 1楼•7 天前作者

更多关于Flutter高级文本控制插件advance_text_controller的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

当然，以下是如何在Flutter中使用advance_text_controller（假设存在这样一个插件，请注意在实际开发中需要确认插件名称和功能的准确性，因为advance_text_controller并不是Flutter官方或广泛认知的插件名）进行高级文本控制的代码案例。

首先，确保在pubspec.yaml文件中添加依赖项（注意：这里的依赖项名称是假设的，请根据实际情况替换）：

dependencies:
  flutter:
    sdk: flutter
  advance_text_controller: ^x.y.z  # 替换为实际版本号

然后，运行flutter pub get来安装依赖。

接下来，我们来看一个使用AdvanceTextController（假设的类名）的示例代码：

import 'package:flutter/material.dart';
import 'package:advance_text_controller/advance_text_controller.dart'; // 假设的导入路径

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Advance Text Controller Demo'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: AdvanceTextControllerDemo(),
        ),
      ),
    );
  }
}

class AdvanceTextControllerDemo extends StatefulWidget {
  @override
  _AdvanceTextControllerDemoState createState() => _AdvanceTextControllerDemoState();
}

class _AdvanceTextControllerDemoState extends State<AdvanceTextControllerDemo> {
  AdvanceTextController? _controller; // 假设的AdvanceTextController类

  @override
  void initState() {
    super.initState();
    // 初始化AdvanceTextController，假设它接受一些配置
    _controller = AdvanceTextController(
      text: "Hello, Advance Text Controller!",
      maxLength: 20,
      onChanged: (String text) {
        // 监听文本变化
        print("Text changed to: $text");
      },
      // 其他可能的配置...
    );
  }

  @override
  void dispose() {
    _controller?.dispose(); // 释放资源
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        TextField(
          controller: _controller,
          decoration: InputDecoration(
            labelText: 'Enter text',
            border: OutlineInputBorder(),
          ),
        ),
        SizedBox(height: 16),
        Text(
          'Current text length: ${_controller?.text.length ?? 0}',
        ),
        SizedBox(height: 16),
        ElevatedButton(
          onPressed: () {
            // 假设的功能：清除文本
            _controller?.clear();
          },
          child: Text('Clear Text'),
        ),
        SizedBox(height: 16),
        ElevatedButton(
          onPressed: () {
            // 假设的功能：获取文本并打印
            final text = _controller?.text;
            print("Current text: $text");
          },
          child: Text('Get Text'),
        ),
      ],
    );
  }
}

在这个示例中，我们假设AdvanceTextController是一个提供高级文本控制功能的类，它可能包括文本长度限制、文本变化监听等功能。我们创建了一个AdvanceTextController实例，并将其与TextField关联，同时展示了如何监听文本变化、清除文本以及获取当前文本。

请注意，由于advance_text_controller并非一个真实存在的Flutter插件（据我所知），上述代码中的类和方法都是基于假设的。在实际开发中，你需要参考具体插件的文档来实现相应的功能。如果advance_text_controller是某个特定团队或个人开发的插件，请查阅其官方文档以获取准确的使用方法和API。