WA

wa_for_textfield_bug.dart

class _MyHomePageState extends State<MyHomePage> {
  TextEditingController controllerA = TextEditingController();
  TextEditingController controllerB = TextEditingController();
  FocusNode nodeA = FocusNode();
  FocusNode nodeB = FocusNode();

  @override
  void initState() {
    super.initState();
    nodeA.addListener(() {
      if (!nodeA.hasFocus) {
        // focusが外れる時にテキストを確定状態にする
        controllerA.value = controllerA.value.copyWith(
          composing: TextRange(start: 0, end: 0),
        );
      }
    });

    nodeB.addListener(() {
      if (!nodeB.hasFocus) {
      　　　　// focusが外れる時にテキストを確定状態にする
        controllerB.value = controllerB.value.copyWith(
          composing: TextRange(start: 0, end: 0),
        );
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Debug')),
      body: Center(
        child: Column(
          children: [
            _buildComposer(controllerA, nodeA),
            _buildComposer(controllerB, nodeB),
          ],
        ),
      ),
    );
  }

  Widget _buildComposer(TextEditingController controller, FocusNode node) {
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 88.0),
      child: TextField(
        controller: controller,
        focusNode: node,
        style: TextStyle(
          color: Colors.black,
          fontSize: 16.0,
        ),
        keyboardType: TextInputType.multiline,
        maxLines: 1,
      ),
    );
  }
}