Flutter:如何在不丢失焦点的情况下关闭TextField的onSubmitted()上的键盘

Question

我有一个TextField小部件，提交onSubmitted()后，我想用readonly = false继续关注这个TextField，但同时我想最小化键盘或关闭它，我不能使用

FocusScope.of(context).requestFocus(new FocusNode()); 

或

FocusScope.of(context).unfocus();

或

SystemChannels.textInput.invokeMethod('TextInput.hide');

Answer 1

当调用onSubmit时，键盘将被禁用，因为readOnly为true，但TextField将具有焦点。但当你点击TextField时，键盘会出现，因为现在readOnly是false，并且它已经有了焦点

class _MyAppState extends State<MyApp> {
bool read = false;

FocusNode focusNode = FocusNode();

@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
body: Center(
child: Container(
padding: EdgeInsets.all(10),
child: TextField(
onTap: () {
read = false;
setState(() {});
},
focusNode: focusNode,
readOnly: read,
cursorColor: Colors.blue,
onSubmitted: (val) async {
print(val);
read = true;
focusNode.requestFocus(new FocusNode());
setState(() {});
},
),
),
),
));
}
}