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final button = new PopupMenuButton(
itemBuilder: (_) => <PopupMenuItem<String>>[
new PopupMenuItem<String>(
child: const Text('Doge'),value: 'Doge'),new PopupMenuItem<String>(
child: const Text('Lion'),value: 'Lion'),],onSELEcted: _doSomething);
final tile = new ListTile(title: new Text('Doge or lion?'),Trailing: button);
我想通过点击图块来打开按钮的菜单.
class _MyHomePageState extends State<MyHomePage> { final GlobalKey _menuKey = new GlobalKey(); @override Widget build(BuildContext context) { final button = new PopupMenuButton( key: _menuKey,itemBuilder: (_) => <PopupMenuItem<String>>[ new PopupMenuItem<String>( child: const Text('Doge'),new PopupMenuItem<String>( child: const Text('Lion'),onSELEcted: (_) {}); final tile = new ListTile(title: new Text('Doge or lion?'),Trailing: button,onTap: () { // This is a hack because _PopupMenuButtonState is private. dynamic state = _menuKey.currentState; state.showButtonMenu(); }); return new Scaffold( body: new Center( child: tile,),); } }
我怀疑你实际要求的是类似于https://github.com/flutter/flutter/issues/254或https://github.com/flutter/flutter/issues/8277跟踪的内容 – 将标签与控件相关联并使标签可点击的能力 – 并且是Flutter框架中缺少的功能.
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