flutter 1.5 in action

https://flutter.dev/docs/get-started/flutter-for/react-native-devs

https://flutter.dev/docs/get-started/flutter-for/web-devs

open ios simulator from terminal

# simulator

$ open -a Simulator

https://flutter.dev/docs/get-started/install/macos#set-up-the-ios-simulator

run ios simulator in spotlight

https://stackoverflow.com/questions/10379622/how-to-run-iphone-emulator-without-starting-xcode

https://facebook.github.io/react-native/docs/running-on-simulator-ios

https://itnext.io/you-dont-need-gui-or-how-to-control-ios-simulator-from-command-line-bf5cfa60aed2

https://developer.apple.com/library/archive/documentation/IDEs/Conceptual/iOS_Simulator_Guide/GettingStartedwithiOSSimulator/GettingStartedwithiOSSimulator.html

run

https://flutter.dev/docs/get-started/test-drive?tab=terminal#run-the-app-2

# Check that an Android device is running
$ flutter devices $ flutter run

$ flutter devices

$ flutter run -d all

env

https://flutter.dev/docs/get-started/install/macos#update-your-path

$ which .zshrc
$ which flutter # edit $HOME/.zshrc $ cat $HOME/.zshrc
$ vim $HOME/.zshrc
$ code . $HOME/.zshrc export PATH="$PATH:[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin"

export PATH=/usr/local/mongodb/bin:$PATH

1.2.1

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
// 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: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
} class MyHomePage extends StatefulWidget {
MyHomePage({Key key, 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
_MyHomePageState createState() => _MyHomePageState();
} class _MyHomePageState extends State<MyHomePage> {
int _counter = 0; void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
} @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 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>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}

1.5.4



install

https://flutter.dev/docs/get-started/install/macos

upgrade

https://flutter.dev/docs/development/tools/sdk/upgrading

$ flutter channel 

$ flutter upgrade

# stable, beta, dev, and master
$ flutter channel stable $ flutter upgrade

https://github.com/flutter/flutter/tree/master/examples

https://github.com/flutter/flutter/blob/master/examples/hello_world/lib/main.dart

delete old & rename new

Flutter versions

  1. flutter_macos_v1.2.1-stable.zip & 464 MB

2019.03.16

  1. flutter_macos_v1.5.4-hotfix.2-stable.zip & 576 MB

2019.06.16

Stable channel

Select from the following scrollable list


Version Ref Release Date
v1.5.4-hotfix.2 7a4c334 5/8/2019
v1.2.1 8661d8a 2/27/2019
v1.0.0 5391447 12/5/2018

demo

// Copyright 2019 xgqfrms

import 'package:flutter/widgets.dart';

void main() => runApp(const Center(child: Text('Hello, world!', textDirection: TextDirection.ltr)));

src

https://github.com/flutter/flutter/blob/master/packages/flutter/lib/widgets.dart

https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/widgets/text.dart

https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/app.dart


Dart

https://github.com/dart-lang

https://github.com/trending/dart

https://github.com/Solido/awesome-flutter

https://github.com/alibaba/flutter-go




xgqfrms 2012-2020

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