没有找到材质小部件颤动与代码

如何解决没有找到材质小部件颤动与代码

我正在使用 VS Code 在 Flutter 中设置 TextField 小部件，但在 TextFormField 上出现此错误：

No Material widget found.
TextField widgets require a Material widget ancestor.
I/Flutter ( 3827): In material design,most widgets are conceptually "printed" on a sheet of material. In Flutter's
I/Flutter ( 3827): material library,that material is represented by the Material widget. It is the Material widget
I/Flutter ( 3827): that renders ink splashes,for instance. Because of this,many material library widgets require that
I/Flutter ( 3827): there be a Material widget in the tree above them.
I/Flutter ( 3827): To introduce a Material widget,you can either directly include one,or use a widget that contains
I/Flutter ( 3827): Material itself,such as a Card,Dialog,Drawer,or Scaffold.
I/Flutter ( 3827): The specific widget that Could not find a Material ancestor was:
I/Flutter ( 3827):   TextField
I/Flutter ( 3827): The ancestors of this widget were:
I/Flutter ( 3827):   ...
I/Flutter ( 3827):   TextFormField
I/Flutter ( 3827):   Column
I/Flutter ( 3827):   Padding
I/Flutter ( 3827):   Padding
I/Flutter ( 3827):   Container

TextFormField 的代码是：

TextFormField txtEmail(String title,IconData icon) {
        return TextFormField(
          controller: emailController,style: TextStyle(color: Colors.white70),decoration: Inputdecoration(
              hintText: title,hintStyle: TextStyle(color: Colors.white70),icon: Icon(icon)),);
      }

实际上我在此调用 txtEmail：

Container textSection() {
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 20.0),margin: EdgeInsets.only(top: 30.0),child: Column(
        children: <Widget>[
          txtEmail("Email",Icons.email),SizedBox(height: 30.0),txtPassword("Password",Icons.lock),],),);
  }

是什么原因？

解决方法

我认为您需要一个 Material Widget 作为根对象（例如 MaterialApp）

{1,2}

查看 https://flutter.dev/ 获取教程。