//flutter不支持ios热更新，ios大，没有skia,路由入栈管理
import 'package:flutter/material.dart';
import 'package:english_words/english_words.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',
home: new Scaffold(
appBar: new AppBar(
title: new Text('Welcome to Flutter')),
body: new Center(child: new RandomWords())),
);
}
}
class RandomWords extends StatefulWidget {
@override
createState() => new RandomWordsState();
}
class RandomWordsState extends State<RandomWords> {
final _suggestions = <WordPair>[];
final _saved = new Set<WordPair>();
final _biggerFont = const TextStyle(fontSize: 18.0);
void _pushSaved() {
Navigator.of(context).push(new MaterialPageRoute(builder: (context) {
final tiles = _saved.map((pair) {
return new ListTile(
title: new Text(pair.asPascalCase, style: _biggerFont));
});
final divided =
ListTile.divideTiles(context: context, tiles: tiles).toList();
return new Scaffold(
appBar: new AppBar(title: new Text('saved')),
body: new ListView(children: divided));
}));
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Startup name generator'),
actions: <Widget>[
new IconButton(icon: new Icon(Icons.list), onPressed: _pushSaved),
new IconButton(icon: new Icon(Icons.search), onPressed: null)
]),
body: _buildSuggestions(),
floatingActionButton: new FloatingActionButton(
tooltip: 'Add', // used by assistive technologies
child: new Icon(Icons.add),
onPressed: null,
),
);
}
Widget _buildSuggestions() {
return new ListView.builder(
padding: const EdgeInsets.all(16.0),
itemBuilder: (context, i) {
if (i.isOdd) return new Divider();
final index = i ~/ 2;
if (index >= _suggestions.length) {
_suggestions.addAll(generateWordPairs().take(10));
}
return _buildRow(_suggestions[index]);
});
}
Widget _buildRow(WordPair pair) {
final alreadySaved = _saved.contains(pair);
return new ListTile(
title: new Text(pair.asPascalCase, style: _biggerFont),
trailing: new Icon(alreadySaved ? Icons.favorite : Icons.favorite_border,
color: alreadySaved ? Colors.red : null),
onTap: () {
setState(() {
if (alreadySaved) {
_saved.remove(pair);
} else {
_saved.add(pair);
}
});
},
);
}
}