我的應用程式在除錯模式下運行良好，但在發布模式下顯示灰屏。這是一個電子商務應用程式，讓我遇到麻煩的頁面是我的產品詳細資訊頁面。我為您提供了兩張圖片，以便您了解錯誤是什么。 這是除錯模式的影像 除錯模式的影像 這是釋放模式的影像 釋放模式的影像 這是我的錯誤日志：-
════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown while applying parent data.:
Incorrect use of ParentDataWidget.
The ParentDataWidget Flexible(flex: 1) wants to apply ParentData of type FlexParentData to a RenderObject, which has been set up to accept ParentData of incompatible type ParentData.
Usually, this means that the Flexible widget has the wrong ancestor RenderObjectWidget. Typically, Flexible widgets are placed directly inside Flex widgets.
The offending Flexible is currently placed inside a ConstrainedBox widget.
The ownership chain for the RenderObject that received the incompatible parent data was:
RepaintBoundary ← NotificationListener<ScrollNotification> ← GlowingOverscrollIndicator ← Scrollable ← PrimaryScrollController ← SingleChildScrollView ← Flexible ← ConstrainedBox ← Container ← _BodyBuilder ← ?
這是我的代碼：-
import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_application_1/pages/home.dart';
import 'package:flutter_application_1/products.dart';
class HomeDetailPage extends StatefulWidget {
const HomeDetailPage({
Key? key,
required this.singleitem,
}) : super(key: key);
final Item singleitem;
@override
State<HomeDetailPage> createState() => _HomeDetailPageState();
}
class _HomeDetailPageState extends State<HomeDetailPage> {
Future<bool> _previousroute() {
// important trick to handle backbutton press;
return Future(() => Navigator.canPop(context));
}
@override
Widget build(BuildContext context) {
// Variables for getting the height and width of the screen
double h = MediaQuery.of(context).size.height;
double w = MediaQuery.of(context).size.width;
return WillPopScope(
onWillPop: () => _previousroute(),
child: Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
shadowColor: Colors.white,
elevation: 0,
leading: IconButton(
icon: Icon(Icons.arrow_back_ios),
color: Colors.black,
onPressed: () {
Navigator.pop(context);
},
)),
// key: ProductsModel.scaffoldKey,
body: Container(
height: h,
child: Flexible(
fit: FlexFit.tight,
child: SingleChildScrollView(
padding: EdgeInsets.all(0.0),
child: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
ClipPath(
clipper: Clipper(),
child: Container(
decoration: BoxDecoration(
color: Color.fromARGB(255, 240, 240, 245),
),
child: Padding(
padding: const EdgeInsets.all(32.0),
child: Hero(
tag: Key(widget.singleitem.id.toString()),
child: Image.network(widget.singleitem.image)),
),
),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
widget.singleitem.name,
style: TextStyle(
color: Colors.black,
fontSize: 30,
fontWeight: FontWeight.bold),
),
],
),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Text(
widget.singleitem.desc,
style: TextStyle(
color: Colors.black,
fontSize: 18,
fontWeight: FontWeight.normal),
),
),
Align(
alignment: Alignment.bottomCenter,
child: Padding(
padding: const EdgeInsets.only(left: 4.0, right: 4.0),
child: Container(
width: w,
// box decoration does not work with button
// decoration: BoxDecoration(
// borderRadius: BorderRadius.circular(32.0)),
child: ElevatedButton(
onPressed: () {
showDialog(
context: context,
builder: (context) {
return Container(
child: AlertDialog(
actions: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
"Your Order Is On The Way",
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold),
),
),
Row(
mainAxisAlignment:
MainAxisAlignment.end,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: ElevatedButton(
onPressed: () {
// Used to create ok button
Navigator.of(context).pop();
},
style: ButtonStyle(
backgroundColor:
MaterialStateProperty.all(
Color.fromRGBO(
0,
0,
0,
1,
)),
shape: MaterialStateProperty
.all(RoundedRectangleBorder(
borderRadius:
BorderRadius
.circular(
16.0)))),
child: Text(
"Ok",
style: TextStyle(
fontSize: 20,
fontWeight:
FontWeight.bold),
),
),
)
],
)
],
));
});
},
style: ButtonStyle(
backgroundColor:
MaterialStateProperty.all(Color.fromRGBO(
0,
0,
0,
1,
)),
shape: MaterialStateProperty.all<
RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(16.0),
))),
child: Text(
"Buy",
style: TextStyle(
color: Colors.white,
fontSize: 25,
fontWeight: FontWeight.bold),
),
),
),
),
)
],
),
),
),
),
),
);
}
}
class Clipper extends CustomClipper<Path> {
@override
Path getClip(Size size) {
// TODO: implement getClip
var path = new Path();
// fixed or unchanged points of the container
path.lineTo(0, 0);
path.lineTo(size.width, 0);
path.lineTo(size.width, size.height - 20);
path.quadraticBezierTo(
//point creating the curve radius
size.width / 2,
size.height 20,
// starting point of the curve
0,
size.height - 20);
return path;
}
@override
bool shouldReclip(covariant CustomClipper<Path> oldClipper) {
// TODO: implement shouldReclip
return false;
}
}
uj5u.com熱心網友回復：
這是因為您正在使用 fixable 作為容器的子項，它應該與列 row 一起使用......等您的代碼將在除錯模式下作業，但在發布時它不會作業，所以試試我的解決方案它會作業
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