在onPressed中添加setState将清除我的TextField (颤动)

TextEditingController textEditingController = TextEditingController();

onPressed: () {
  setState(() {
    textEditingController.clear();
  });
},

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  TextEditingController textEditingController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            TextField(
              controller: textEditingController,
            ),
            RaisedButton(
              onPressed: () {
                setState(() {
                  textEditingController.clear();
                });
              },
              child: Text('清除文本'),
            ),
          ],
        ),
      ),
    );
  }
}