icloud_kv_storage 0.0.1

A Key Value Storage Sync multiple iOS & Mac Devices base on iCloud.

example/lib/main.dart

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

var iCloudStorage = CKKVStorage();

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

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // 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> {
  var key = 'k_storage_count';
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
      iCloudStorage.writeString(key: key, value: _counter.toString());
    });
  }

  void _clearCounter() {
    setState(() {
      _counter = 0;
      iCloudStorage.delete(key);
    });
  }

  @override
  void initState() {
    iCloudStorage.onCloudKitKVUpdateCallBack(
      onCallBack: (kvMap) {
        print('receive icloud_key_update');
        if (kvMap[iCloudStorage.getRealKey('k_storage_count')] != null) {
          setState(() {
            _counter =
                int.parse(kvMap[iCloudStorage.getRealKey('k_storage_count')]);
          });
        } else {
          //may removed
          setState(() {
            _counter = 0;
          });
        }
      },
    );
    iCloudStorage.getString('k_storage_count').then((value) {
      if (value != null) {
        setState(() {
          _counter = int.parse(value);
        });
      }
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    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: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'iCloud Sync Count:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
      floatingActionButton: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
        FloatingActionButton(
          onPressed: _incrementCounter,
          tooltip: 'Increment',
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: const [
            Icon(Icons.add),
            Text('add'),
          ]),
        ),
        const SizedBox(width: 15,),
        FloatingActionButton(
          onPressed: _clearCounter,
          tooltip: 'Clear',
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: const [
            Icon(Icons.cleaning_services),
            Text('clear'),
          ]),
        )
      ]), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}