Flutter标签输入插件flutter_chips_input_sunny的使用

Flutter标签输入插件flutter_chips_input_sunny的使用

使用说明

安装

请按照以下步骤安装flutter_chips_input_sunny插件：

dependencies:
  flutter_chips_input_sunny: ^版本号

在您的pubspec.yaml文件中添加上述依赖项，并运行flutter pub get以获取新的依赖项。

导入

在您的Dart文件中导入flutter_chips_input_sunny库：

import 'package:flutter_chips_input_sunny/flutter_chips_input.dart';

示例代码

ChipsInput

以下是一个简单的示例代码，展示了如何使用ChipsInput组件：

import 'package:flutter/material.dart';
import 'package:flutter_chips_input_sunny/flutter_chips_input.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Chips Input',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

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

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

class _MyHomePageState extends State<MyHomePage> {
  final ChipsInputController<AppProfile> controller = ChipsInputController<AppProfile>(
    findSuggestions: _findSuggestions,
  );

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Chips Input Example'),
      ),
      body: Padding(
        padding: EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            ChipsInput<AppProfile>(
              controller: controller,
              placeholder: "Search contacts",
              maxChips: 5,
              decoration: InputDecoration(
                labelText: "Select People",
              ),
              chipBuilder: (context, _, profile) {
                return InputChip(
                  key: ObjectKey(profile),
                  label: Text(profile.name),
                  avatar: CircleAvatar(
                    backgroundImage: NetworkImage(profile.imageUrl),
                  ),
                  onDeleted: () => controller.deleteChip(profile),
                  materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
                );
              },
              suggestionBuilder: (context, _, profile) {
                return ListTile(
                  key: ObjectKey(profile),
                  leading: CircleAvatar(
                    backgroundImage: NetworkImage(profile.imageUrl),
                  ),
                  title: Text(profile.name),
                  subtitle: Text(profile.email),
                  onTap: () => controller.addChip(profile),
                );
              },
            ),
          ],
        ),
      ),
    );
  }

  ChipSuggestions<AppProfile> _findSuggestions(String query) {
    if (query.isNotEmpty) {
      var lowercaseQuery = query.toLowerCase();
      var foundResults = mockResults.where(
        (profile) {
          return profile.name.toLowerCase().contains(lowercaseQuery) ||
              profile.email.toLowerCase().contains(lowercaseQuery);
        },
      ).toList(growable: false)
        ..sort((a, b) => a.name.toLowerCase().indexOf(lowercaseQuery).compareTo(b.name.toLowerCase().indexOf(lowercaseQuery)));
      var exactMatch = mockResults.firstWhere(
        (profile) => profile.name.toLowerCase() == lowercaseQuery || profile.email.toLowerCase() == lowercaseQuery,
        orElse: () => null,
      );
      return ChipSuggestions<AppProfile>(
          suggestions: foundResults,
          match: foundResults.length == 1 && exactMatch != null
              ? Suggestion.highlighted(item: exactMatch, highlightText: exactMatch.name)
              : Suggestion.empty());
    } else {
      return const ChipSuggestions.empty();
    }
  }
}

class AppProfile {
  final String name;
  final String email;
  final String imageUrl;

  const AppProfile(this.name, this.email, this.imageUrl);

  [@override](/user/override)
  bool operator ==(Object other) =>
      identical(this, other) || other is AppProfile && runtimeType == other.runtimeType && name == other.name;

  [@override](/user/override)
  int get hashCode => name.hashCode;

  [@override](/user/override)
  String toString() {
    return name;
  }
}

const mockResults = [
  AppProfile('John Doe', 'jdoe@flutter.io', 'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg'),
  AppProfile('Paul', 'paul@google.com', 'https://mbtskoudsalg.com/images/person-stock-image-png.png'),
  AppProfile('Fred', 'fred@google.com', 'https://media.istockphoto.com/photos/feeling-great-about-my-corporate-choices-picture-id507296326'),
  AppProfile('Brian', 'brian@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('John', 'john@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Thomas', 'thomas@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Nelly', 'nelly@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Marie', 'marie@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Charlie', 'charlie@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Diana', 'diana@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Ernie', 'ernie@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
  AppProfile('Gina', 'fred@flutter.io', 'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
];