import 'package:flutter/material.dart';void main() {runApp(const MyApp());}class MyApp extends StatelessWidget {const MyApp({super.key});@overrideWidget build(BuildContext context) {return MaterialApp(home: Scaffold(appBar: AppBar(title: const Text('TextField Example')),body: const Padding(pa...
/// For example, for a TextFormField when the keyboard is displayed /// /// 使用方法: /// /// In the class that implements the Form, /// Instantiate a FocusNode /// FocusNode _focusNode = new FocusNode(); /// /// In the build(BuildContext context), wrap the TextFormField as ...
import'package:flutter/material.dart';classMyPageextendsStatefulWidget{@override_MyPageStatecreateState()=>_MyPageState();}class_MyPageStateextendsState<MyPage>{String email='';String password='';@overrideWidgetbuild(BuildContext context){returnScaffold(appBar:AppBar(title:Text('TextField Example'))...
( title: Text('Form Example'), ), body: Column( children: [ TextField( controller: _textEditingController, enabled: _isFormEnabled, ), RaisedButton( child: Text('Submit'), onPressed: () { String userInput = _textEditingController.text; if (_isFormEnabled) {...
在本节中,我们将使用“Button”和“TextField”小部件构建一个基本的登录屏幕。我们将遵循一步一步的方法,允许您编写代码并理解过程的每个部分。我们开始吧! Scenario: Creating a Login Screen 场景:创建登录界面 Imagine you’re building a mobile app that requires user authentication. You want users to be ...
在Flutter中,TextField是用于接收用户输入文本的常用小部件之一。以下是TextField的详细用法示例: 1.导入所需的包: import'package:flutter/material'; 2.在Widget的build方法中使用TextField: @override Widgetbuild(BuildContextcontext){ returnScaffold( appBar:AppBar( title:Text('TextFieldExample'), ), bod...
text“。您可以根据需要使用多个参数,如- "text1“、"text2”、"text3“等,并为此使用任意多个Text...
以下是使用一个TextEditingController读取TextField中用户输入的值的示例: /// Opens an [AlertDialog] showing what the user typed.classExampleWidgetextendsStatefulWidget { ExampleWidget({Key key}) :super(key: key); @override _ExampleWidgetState createState()=>new_ExampleWidgetState(); ...
TextEditingController是一个控制文本输入框的控制器类,使用它来获取输入框TextField中的文本内容,以及监听输入框的变化。TextFormField是TextField的一个包装器(两者功能接近),它提供了更多的功能和验证选项,内置了表单验证和错误提示功能,例如 l textInputAction:键盘上显示的动作,比如下一个、搜索 ...
I/flutter (10175): top of your application widget tree. It determines the ambient reading direction andisused,forI/flutter (10175): example, to determine how to lay out text, how to interpret"start"and"end"values, and to resolve