Flutter加载覆盖层插件basic_loading_overlay的使用

Flutter加载覆盖层插件basic_loading_overlay的使用

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特性

创建一个新的作用域，在您通过编程将其弹出之前用户无法离开。

使用方法

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

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

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

  // 此小部件是您的应用程序的根。
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Basic Loading Overlay',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(10.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                '每次您按下按钮时，加载覆盖层将在N秒后消失，其中N是您按下的次数。',
              ),
              const SizedBox(
                height: 15,
              ),
              const Text(
                '您已经按下了按钮这么多次：',
              ),
              Text(
                '$_counter',
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.w600,
                ),
              ),
            ],
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _showOverlay,
        tooltip: '增加',
        child: const Icon(Icons.add),
      ),
    );
  }

  Future<void> _showOverlay() async {
    _incrementCounter();

    Future.delayed(
      Duration(seconds: _counter),
      () => Navigator.of(context).pop(),
    );

    LoadingOverlay.show(
      context: context,
    );
  }
}

额外信息

如果您喜欢这个包并发现它有用，请给它点赞。

示例代码

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

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

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

  // 此小部件是您的应用程序的根。
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Basic Loading Overlay',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(10.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                '每次您按下按钮时，加载覆盖层将在N秒后消失，其中N是您按下的次数。',
              ),
              const SizedBox(
                height: 15,
              ),
              const Text(
                '您已经按下了按钮这么多次：',
              ),
              Text(
                '$_counter',
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.w600,
                ),
              ),
            ],
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _showOverlay,
        tooltip: '增加',
        child: const Icon(Icons.add),
      ),
    );
  }

  Future<void> _showOverlay() async {
    _incrementCounter();

    Future.delayed(
      Duration(seconds: _counter),
      () => Navigator.of(context).pop(),
    );

    LoadingOverlay.show(
      context: context,
    );
  }
}