问题描述
一小时前,当我将 TextField 放入 AlertDialog 时,我发现了一个奇怪的行为,它不允许输入空格,否则它的行为正常,这是我的代码:
//================Flutter 医生 -v [√] Flutter (Channel stable,2.0.2,on Microsoft Windows [Version 10.0.18363.1316],locale en-US) • Flutter 2.0.2 版位于 C:\Flutter\Flutter-latest • 框架修订版 8962f6dc68(5 天前),2021-03-11 13:22:20 -0800 • 引擎修订版 5d8bf811b3 • Dart 版本 2.12.1
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• 未发现问题!
//======AppTextField widget
import 'package:Flutter/material.dart';
import 'package:Flutter/services.dart';
class AppTextField extends StatefulWidget {
final String caption;
final dynamic initialValue;
final dynamic Function(String) onSubmitted;
final bool readOnly;
const AppTextField(
{Key key,this.caption,this.onSubmitted,this.initialValue,this.readOnly = false})
: super(key: key);
@override
_AppTextFieldState createState() => _AppTextFieldState();
}
class _AppTextFieldState extends State<AppTextField> {
TextEditingController _textEditingController;
TextStyle _captionStyle = TextStyle(fontSize: 17);
TextStyle _textStyle = TextStyle(fontSize: 17);
String get value => _textEditingController.text;
@override
void initState() {
super.initState();
this._textEditingController = TextEditingController();
this._textEditingController.text = this.widget.initialValue != null
? this.widget.initialValue.toString()
: "";
}
@override
Widget build(BuildContext context) {
return TextField(
textInputAction: TextInputAction.none,readOnly: this.widget.readOnly,enableInteractiveSelection: true,cursorHeight: 30,onEditingComplete: () {
int u = 9;
},onChanged: (v) {
// if (this.widget.onSubmitted != null) {
// var val = this.widget.onSubmitted(v);
// if (val != null) this._textEditingController.text = val.toString();
// }
},style: _textStyle,controller: _textEditingController,decoration: Inputdecoration(
isDense: true,contentPadding: EdgeInsets.all(15.0),labelText: this.widget.caption,floatingLabelBehavior: FloatingLabelBehavior.always,border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),borderSide: BorderSide(color: Colors.green,width: 1.0))),);
}
@override
void dispose() {
this._textEditingController.dispose();
super.dispose();
}
}
//======the I use AppTextField widget inside AlertDialog like this :
import 'package:animate_do/animate_do.dart';
import 'package:Flutter/material.dart';
import 'package:Flutter_desktop/Views/App-Widgets/AppTextField.dart';
import 'package:Flutter_desktop/Views/Room/Notification-Dialog.dart';
import 'package:Flutter_desktop/Views/states/Message-State.dart';
import 'package:provider/provider.dart';
import 'Chat/ChatMessage.dart';
class SendNotificationDialog extends StatefulWidget {
@override
_SendNotificationDialogState createState() => _SendNotificationDialogState();
}
class _SendNotificationDialogState extends State<SendNotificationDialog> {
String _message = "";
@override
Widget build(BuildContext context) {
return AlertDialog(
elevation: 10,titleTextStyle: TextStyle(
fontSize: 20,fontWeight: FontWeight.bold,color: Colors.black),title: Text("رسالة تنبيه"),content: Builder(
builder: (context) => _createBody(context),),actions: [
MaterialButton(
onpressed: () {
Navigator.pop(context);
var messageState =
Provider.of<MessageState>(context,listen: false);
messageState.addMessage(_message,MessageType.NOTIFICATION);
Navigator.push(
context,PageRouteBuilder(
barrierdismissible: true,opaque: false,pageBuilder: (_,__,___) => NotificationDialog(
userName: "Yousel : ",notification: _message,)));
},child: Text("موافق"),MaterialButton(
onpressed: () {
Navigator.pop(context);
},child: Text("إلغاء"),],);
}
_createBody(BuildContext context) {
return Container(
width: 500,height: 100,child: ListTile(
autofocus: true,title: AppTextField(
initialValue: _message,onSubmitted: (v) {
_message = v;
return _message;
},caption: "أدخل النص الذى سوف يشاهده الجميع",);
}
}
//=======Then I push SendNotificationDialog page :
Navigator.push(
context,PageRouteBuilder(
barrierdismissible: true,transitionDuration: Duration(milliseconds: 500),transitionsBuilder:
(context,firstAnimation,secondAnimation,child) {
firstAnimation = CurvedAnimation(
parent: firstAnimation,curve: Curves.fastLinearToslowEaseIn);
return ScaleTransition(
scale: firstAnimation,child: child,);
},___) {
return SendNotificationDialog();
}));
解决方法
问题已解决,当我将 TextField 包裹在 ListTile 小部件中时出现问题,它与 AlertDialog 包裹无关,我在删除 ListTile 时测试它行为正常,否则我拒绝空格字符,谢谢朋友。