flutter_status_widget 0.0.7

状态页管理库（Flutter Widget），支持 Loading/Success/Error/Empty 四种状态切换，提供全局默认页面配置、独立页面覆盖与自定义内容回调功能。

example/lib/main.dart

import 'package:example/src/simple_holder.dart';
import 'package:flutter/material.dart';
import 'package:flutter_status_widget/status_widget.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    scInstance
      ..addBuilder(
          Status.loading, ({data}) => const SimpleHolder(text: "加载中..."))
      ..addBuilder(Status.error, ({data}) => SimpleHolder(text: data))
      ..addBuilder(Status.empty, ({data}) => SimpleHolder(text: data));

    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: '状态页切换示例'),
    );
  }
}

enum Status {
  loading,
  error,
  empty,
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final StatusController controller = StatusController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Column(
        children: [
          Expanded(
            child: StatusLayout(
              controller: controller,
              child: ListView.builder(
                itemBuilder: (context, index) => Center(
                  child: Text("$index"),
                ),
                itemCount: 100,
              ),
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton.small(
        onPressed: changeStatus,
        child: const Icon(Icons.change_circle_outlined),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  changeStatus() {
    switch (controller.currentStatus) {
      case success:
        controller.show(Status.loading);
        break;
      case Status.loading:
        controller.show(Status.empty, data: "没有数据");
        break;
      case Status.empty:
        controller.show(Status.error, data: "请求异常");
        break;
      case Status.error:
        controller.showSuccess();
        break;
      default:
        controller.showSuccess();
        break;
    }
  }
}