Flutter -如何更改TextField边框颜色？

import 'package:flutter/material.dart';

class MyTextField extends StatefulWidget {
  @override
  _MyTextFieldState createState() => _MyTextFieldState();
}

class _MyTextFieldState extends State<MyTextField> {
  @override
  Widget build(BuildContext context) {
    return TextField(
      decoration: InputDecoration(
        border: OutlineInputBorder(
          borderSide: BorderSide(color: Colors.red), // 设置边框颜色
        ),
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: MyTextField(),
        ),
      ),
    );
  }
}