Flutter日期时间选择器插件date_time_picker_widget的使用

发布于 1周前 作者 wuwangju 来自 Flutter

Flutter日期时间选择器插件date_time_picker_widget的使用

date_time_picker_widget 是一个用于在Flutter应用中选择日期和时间的新UI设计插件。本文将详细介绍如何在Flutter项目中集成并使用这个插件。

添加依赖

首先,在你的 pubspec.yaml 文件中添加以下依赖:

dependencies:
  ...
  date_time_picker_widget: ^2.0.0

然后运行 flutter pub get 来安装该插件。

导入包

在你的Dart文件中导入该插件:

import 'package:date_time_picker_widget/date_time_picker_widget.dart';

示例代码

下面是一个完整的示例,展示了如何使用 DateTimePicker 小部件来选择日期和时间。

完整示例Demo

import 'package:date_time_picker_widget/date_time_picker_widget.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData.from(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
      ),
      home: const MyHomePage(title: 'Date Time Picker Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  Color _color = Colors.blue;
  String _d1 = '', _d2 = '';
  String _t1 = '', _t2 = '';
  bool _material3 = true;

  @override
  Widget build(BuildContext context) {
    return Theme(
      data: Theme.of(context).copyWith(
        colorScheme: ColorScheme.fromSeed(
          seedColor: _color,
          primary: _color,
          secondary: _color,
        ),
        useMaterial3: _material3,
      ),
      child: Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: SafeArea(
          child: SingleChildScrollView(
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 0),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  const SizedBox(height: 24),
                  CheckboxListTile(
                    value: _material3,
                    title: Text(
                      'Use Material 3',
                      style: Theme.of(context).textTheme.titleLarge,
                    ),
                    onChanged: (value) {
                      setState(() {
                        _material3 = value ?? true;
                      });
                    },
                  ),
                  const SizedBox(height: 24),
                  Text(
                    'Color Pallet',
                    textAlign: TextAlign.center,
                    style: Theme.of(context).textTheme.titleLarge,
                  ),
                  const SizedBox(height: 24),
                  _colorPallet(),
                  const SizedBox(height: 24),
                  const Divider(),
                  const SizedBox(height: 24),
                  _dateTimePicker(),
                  const SizedBox(height: 24),
                  const Divider(),
                  const SizedBox(height: 24),
                  _datePicker(),
                  const SizedBox(height: 24),
                  const Divider(),
                  const SizedBox(height: 24),
                  _timePicker(),
                  const Divider(),
                  const SizedBox(height: 24),
                  _newDatetimePicker(),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget _newDatetimePicker(){
    final dt = DateTime.now();
    final dtMin = DateTime.now().add(const Duration(hours: 1, minutes: 0));
    final dtMax = dtMin.add(const Duration(days: 4));

    return Container(
      child: DateTimePicker(
        initialSelectedDate: dtMin,
        startDate: dtMin,
        endDate: dtMax,
        startTime: dt,
        endTime: dtMax,
        timeInterval: const Duration(minutes: 15),
        datePickerTitle: 'Pick your preferred date',
        timePickerTitle: 'Pick your preferred time',
        timeOutOfRangeError: 'Sorry shop is closed now',
        is24h: false,
        numberOfWeeksToDisplay: 1,
        locale: 'es',
        customStringWeekdays: const ['D', 'L', 'M', 'X', 'J', 'V', 'S'],
        onDateChanged: (date) {
          setState(() {
            _d1 = DateFormat('dd MMM, yyyy').format(date);
          });
        },
        onTimeChanged: (time) {
          setState(() {
            _t1 = DateFormat('hh:mm:ss aa').format(time);
          });
        },
      ),
    );
  }

  Widget _dateTimePicker() {
    final dt = DateTime.now();
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text(
          'Date & Time Picker',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.titleLarge,
        ),
        const SizedBox(height: 8),
        Text(
          'Date: $_d1  Time: $_t1',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.bodyMedium,
        ),
        const SizedBox(height: 16),
        DateTimePicker(
          initialSelectedDate: dt,
          startDate: dt.subtract(const Duration(days: 1)),
          endDate: dt.add(const Duration(days: 60)),
          startTime: DateTime(dt.year, dt.month, dt.day, 6),
          endTime: DateTime(dt.year, dt.month, dt.day, 18),
          timeInterval: const Duration(minutes: 15),
          datePickerTitle: 'Pick your preferred date',
          timePickerTitle: 'Pick your preferred time',
          timeOutOfRangeError: 'Sorry shop is closed now',
          is24h: false,
          numberOfWeeksToDisplay: 4,
          onDateChanged: (date) {
            setState(() {
              _d1 = DateFormat('dd MMM, yyyy').format(date);
            });
          },
          onTimeChanged: (time) {
            setState(() {
              _t1 = DateFormat('hh:mm:ss aa').format(time);
            });
          },
        )
      ],
    );
  }

  Widget _datePicker() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text(
          'Date Picker',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.titleLarge,
        ),
        const SizedBox(height: 8),
        Text(
          'Date: $_d2',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.bodyMedium,
        ),
        const SizedBox(height: 16),
        DateTimePicker(
          type: DateTimePickerType.Date,
          onDateChanged: (date) {
            setState(() {
              _d2 = DateFormat('dd MMM, yyyy').format(date);
            });
          },
        )
      ],
    );
  }

  Widget _timePicker() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text(
          'Time Picker',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.titleLarge,
        ),
        const SizedBox(height: 8),
        Text(
          'Time: $_t2',
          textAlign: TextAlign.center,
          style: Theme.of(context).textTheme.bodyMedium,
        ),
        const SizedBox(height: 16),
        DateTimePicker(
          type: DateTimePickerType.Time,
          timeInterval: const Duration(minutes: 30),
          onTimeChanged: (time) {
            setState(() {
              _t2 = DateFormat('hh:mm:ss aa').format(time);
            });
          },
        )
      ],
    );
  }

  Widget _colorPallet() {
    return Row(
      crossAxisAlignment: CrossAxisAlignment.center,
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        InkWell(
          onTap: () {
            setState(() {
              _color = Colors.amber;
            });
          },
          child: Container(
            width: 24,
            height: 24,
            color: Colors.amber,
          ),
        ),
        InkWell(
          onTap: () {
            setState(() {
              _color = Colors.green;
            });
          },
          child: Container(
            width: 24,
            height: 24,
            color: Colors.green,
          ),
        ),
        InkWell(
          onTap: () {
            setState(() {
              _color = Colors.blue;
            });
          },
          child: Container(
            width: 24,
            height: 24,
            color: Colors.blue,
          ),
        ),
        InkWell(
          onTap: () {
            setState(() {
              _color = Colors.deepPurple;
            });
          },
          child: Container(
            width: 24,
            height: 24,
            color: Colors.deepPurple,
          ),
        ),
      ],
    );
  }
}

参数说明

  • type: 可以设置为 DateTimePickerType.Date, DateTimePickerType.Time, 或 DateTimePickerType.Both
  • initialSelectedDate: 初始选中的日期。
  • startDate: 开始日期。
  • endDate: 结束日期。
  • startTime: 开始时间。
  • endTime: 结束时间。
  • timeInterval: 时间间隔,默认是15分钟。
  • datePickerTitle: 日期选择器标题。
  • timePickerTitle: 时间选择器标题。
  • timeOutOfRangeError: 时间超出范围时的错误提示。
  • is24h: 是否使用24小时制。
  • locale: 设置语言环境,例如 'es' 表示西班牙语。
  • customStringWeekdays: 自定义星期几的显示名称。

通过上述步骤,你可以在Flutter应用中轻松实现日期和时间的选择功能。希望这个指南对你有所帮助!


更多关于Flutter日期时间选择器插件date_time_picker_widget的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter日期时间选择器插件date_time_picker_widget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项目中使用date_time_picker_widget插件的一个示例代码案例。首先,确保你已经在pubspec.yaml文件中添加了该插件的依赖项:

dependencies:
  flutter:
    sdk: flutter
  date_time_picker_widget: ^x.y.z  # 请替换为最新版本号

然后,运行flutter pub get来获取依赖项。

接下来,你可以在你的Flutter应用中使用DateTimePickerWidget。以下是一个完整的示例,展示如何在Flutter应用中实现日期和时间选择器:

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'DateTimePickerWidget Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  DateTime? selectedDateTime;

  void _selectDateTime(BuildContext context) async {
    final DateTimePickerResult result = await DateTimePickerWidget.showDateTimePicker(
      context: context,
      language: DateTimePickerLanguage.en,
      initialDateTime: selectedDateTime ?? DateTime.now(),
      dateFormat: "yyyy-MM-dd",
      timeFormat: "HH:mm:ss",
      title: "Select Date & Time",
      is24HourFormat: true,
    );

    if (result.confirmed && result.dateTime != null) {
      setState(() {
        selectedDateTime = result.dateTime;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('DateTimePickerWidget Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              selectedDateTime == null
                  ? 'No date and time selected'
                  : 'Selected Date and Time: ${selectedDateTime!.toLocal()}',
              style: TextStyle(fontSize: 20),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () => _selectDateTime(context),
              child: Text('Select Date & Time'),
            ),
          ],
        ),
      ),
    );
  }
}

在这个示例中,我们创建了一个简单的Flutter应用,其中包含一个按钮,点击按钮时会显示一个日期和时间选择器。选择日期和时间后,选定的日期和时间会显示在页面上。

代码解释:

  1. 依赖项:在pubspec.yaml文件中添加date_time_picker_widget依赖项。
  2. 主应用MyApp类作为应用的入口点。
  3. 主页面MyHomePage是一个有状态的组件,用于管理选中的日期和时间。
  4. 选择日期和时间_selectDateTime方法使用DateTimePickerWidget.showDateTimePicker显示日期和时间选择器,并将结果存储在selectedDateTime变量中。
  5. UI:使用TextElevatedButton组件来显示选中的日期和时间以及触发日期时间选择器的按钮。

希望这个示例能帮助你更好地了解如何在Flutter中使用date_time_picker_widget插件。如果你有任何其他问题,欢迎继续提问!

回到顶部