此问题是因为每次重新构建窗口小部件时，您都在创建新的 TextEditingController .因此，要解决此问题，请将这些变量 nameTextFieldController ， emailTextFieldController 移至构建方法之外.

This issue is because you are creating new TextEditingController every time your widget is rebuilt. So to fix this issue, move these variables nameTextFieldController ,emailTextFieldController outside your build method.

赞:

  TextEditingController nameTextFieldController = TextEditingController();
   TextEditingController emailTextFieldController = TextEditingController();

@override
  Widget build(BuildContext context) {
    ...