Flutter / Dart滚动键盘上方的文本字段

Question

我正在使用文本字段，如何在输入电子邮件和密码时将其向上滚动？

这是代码的预览

https://pastebin.com/4EngQDV5

blank

Answer 1

这是新代码。我认为这个可以帮到你。在passwordField声明后添加此代码。

 return Scaffold(
  body: Center(
    child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        emailField,
        SizedBox(
          height: 10,
        ),
        passwordField,
      ],
    ),
  ),
);

Answer 2

我实际上遇到了同样的问题。想象一下，您需要将TextForms包装到ListView中以使其工作。

import 'package:flutter/material.dart';

class ScrollView extends StatefulWidget {
@override
State<StatefulWidget> createState() {
// TODO: implement createState
return _ScrollViewState();
}
}

class _ScrollViewState extends State<ScrollView>{
@override
Widget build(BuildContext context) {
return Scaffold(
    backgroundColor: userInputBackgroundColor,
    body: ListView(
              padding: EdgeInsets.all(0.0),
              shrinkWrap: true,
              children: <Widget>[
               TextForm(),
               TextForm()
              ]
          ),
        )
    }
}

Answer 3

好的，首先，你粘贴的代码是不完整的，所以我猜你正在将这些文本字段放在一个列中。您有两种选择： 1）在你的脚手架中，你可以将此属性设置为false，如resizeToAvoidBottomPadding：false， 2o）您可以使用SingleChildScrollView，当键盘出现时将向上移动文本字段，例如：

import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: SingleChildScrollView(
          child: MyLoginPage(title: 'Flutter Demo Home Page'),
        ),
      ),
    );
  }
}

class MyLoginPage extends StatefulWidget {
  MyLoginPage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyLoginPageState createState() => _MyLoginPageState();
}

class _MyLoginPageState extends State<MyLoginPage> {
  String _email;
  String _password;
  TextStyle style = TextStyle(fontSize: 25.0);

  @override
  Widget build(BuildContext context) {
    final emailField = TextField(
      obscureText: false,
      style: style,
      decoration: InputDecoration(
          contentPadding: EdgeInsets.fromLTRB(20.0, 15.0, 20.0, 15.0),
          prefixIcon: Icon(FontAwesomeIcons.solidEnvelope),
          hintText: "Email",
          focusedBorder: OutlineInputBorder(
              borderSide: BorderSide(color: Colors.red[300], width: 32.0),
              borderRadius: BorderRadius.circular(97.0))),
      onChanged: (value) {
        setState(() {
          _email = value;
        });
      },
    );
    final passwordField = TextField(
      obscureText: true,
      style: style,
      decoration: InputDecoration(
          contentPadding: EdgeInsets.fromLTRB(20.0, 15.0, 20.0, 15.0),
          prefixIcon: Icon(FontAwesomeIcons.key),
          hintText: "Password",
          focusedBorder: OutlineInputBorder(
              borderSide: BorderSide(color: Colors.red[300], width: 32.0),
              borderRadius: BorderRadius.circular(25.0))),
      onChanged: (value) {
        setState(() {
          _password = value;
        });
      },
    );

    return Center(
      child: Column(
        children: <Widget>[
          Container(
            color: Colors.yellow[300],
            height: 300.0,
          ),
          emailField,
          passwordField
        ],
      ),
    );
  }
}

只需复制并粘贴代码，看看它是否是您想要的。 希望这有帮助。