问题描述
我已经尝试了几个小时来解决这个问题但没有成功,所以我认为通过询问 Stackoverflow 来节省一些头发是值得的。
问题: 我无法让 TextButton 占据其父 AlertDialog 小部件的整个宽度。 当我试图将 TextButton 包裹在一个宽度为 double.infinity 的 SizedBox 中时,当我按下按钮时它会崩溃(这应该是一种让按钮根据网络获得全宽的方法)。>
预期效果: 让 TextButton 占据父 AlertDialog 的宽度。
这是解决该问题的最小可行代码(请注意,我使用的是 google fonts 包,我希望我已经摆脱了它们,但这里已经很晚了。):
import 'package:Flutter/material.dart';
// import 'package:google_fonts/google_fonts.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
inputdecorationTheme: InputdecorationTheme(
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(
color: Color(0xffB2413A),),home: LoginScreen(),);
}
}
class LoginScreen extends StatelessWidget {
const LoginScreen({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
var size = MediaQuery.of(context).size;
return Scaffold(
body: Container(
height: size.height,child: Center(child: LoginWidget()),decoration: Boxdecoration(
color: Colors.black54,image: decorationImage(
image: Assetimage('assets/background_image.jpeg'),fit: BoxFit.cover,colorFilter: ColorFilter.mode(
Colors.black.withOpacity(0.08),BlendMode.dstATop),);
}
}
class LoginWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
final _size = MediaQuery.of(context).size;
final double _height = (_size.height) * 0.40;
final double _width = _height * 0.8;
return Column(
crossAxisAlignment: CrossAxisAlignment.center,mainAxisAlignment: MainAxisAlignment.center,children: [
Container(
child: Center(
child: Text(
'Login',style: TextStyle(
color: Colors.white,fontSize: 26,fontWeight: FontWeight.bold),height: _size.height * 0.085,width: _width,decoration: Boxdecoration(
color: Color(0xffB2413A),borderRadius: BorderRadius.only(
topLeft: Radius.circular(15),topRight: Radius.circular(15)),Container(
height: _size.height * 0.38,decoration: Boxdecoration(
color: Colors.white,borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(15),bottomright: Radius.circular(15)),child: Column(
crossAxisAlignment: CrossAxisAlignment.center,children: [
Padding(
padding: const EdgeInsets.all(12.0),child: TextFielDalertDialog(),],);
}
}
class TextFielDalertDialog extends StatelessWidget {
_displayDialog(BuildContext context) async {
return showDialog(
context: context,builder: (context) {
return AlertDialog(
titlePadding: EdgeInsets.all(0),actionsPadding: EdgeInsets.all(0),buttonPadding: EdgeInsets.all(0),//Todo: THIS TEXTBUTTON WON'T TAKE THE SIZE OF ITS PARENT //.
actions: <Widget>[
SizedBox(
width: double.infinity,child: TextButton(
onpressed: () {},child: Text("Reset Password"),// style: TextButton.styleFrom(
// textStyle: GoogleFonts.rubik(fontSize: 25),// primary: Colors.white,// backgroundColor: Color(0xffB2413A),// ),);
},);
}
@override
Widget build(BuildContext context) {
return Center(
child: TextButton(
child: Text(
'FORGET PASSWORD',// style: GoogleFonts.rubik(
// color: Colors.black,fontSize: 18,fontWeight: FontWeight.w500),onpressed: () => _displayDialog(context),);
}
}
对解决此问题的任何帮助将不胜感激。
我添加了崩溃报告的截图:
问题:
- 如何让按钮占据父 AlertDialog 的整个宽度?
解决方法
我更改并修改了代码,请尝试一下。 (已修改)
SizedBox(
width: MediaQuery.of(context).size.width,//full width
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 8.0),//space from both sides
child: TextButton(
onPressed: () {},child: Text("Reset Password"),// style: TextButton.styleFrom(
// textStyle: GoogleFonts.rubik(fontSize: 25),// primary: Colors.white,// backgroundColor: Color(0xffB2413A),// ),),
[1]: https://i.stack.imgur.com/AsOWY.png [![演示图像][1]][1]