我在Flutter应用程序中遇到了非常奇怪的问题！当我在调试模式下测试我的应用程序时，它工作正常，但在发布模式下却显示白屏。这个应用程序已经在Playstore上发布了。几天后，我改变了这个应用程序。我想发布第二个版本。当我尝试构建发布apk时，在调试模式下工作正常，但在发布模式下显示白屏。为什么会发生这种情况？这是Flutter版本问题吗？
这里是代码
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:tv/Online.dart';
import 'package:tv/paypal.dart';
import 'package:url_launcher/url_launcher.dart';
class Donateus extends StatefulWidget {
@override
_DonateusState createState() => _DonateusState();
}
class _DonateusState extends State<Donateus> {
bool _isExpandedonline=false;
bool _isExpandedpaypal=false;
bool _isExpandedetransfer=false;
bool _isExpandedtexttogive=false;
void customLaunch(command) async {
if (await canLaunch(command)) {
await launch(command);
} else {
print(' could not launch $command');
}
}
@override
void initState() {
// TODO: implement initState
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: SingleChildScrollView(
scrollDirection: Axis.vertical,
child:Padding(
padding: EdgeInsets.all(10),
child: Container(
child:Expanded(
child: Column(
children: <Widget>[
Text(
'WAYS TO DONATE',
style: TextStyle(
fontFamily: 'TT NORMS',
fontSize: 20,
fontWeight: FontWeight.w100,
),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: Text(
'All of our Donations are processed through Cornerstone Asian Church.We are a registered Canadian Charity (842869265RR0001). A Canadian Tax-deductible receipt will be issued to you.',
style: TextStyle(
fontSize: 14
),
),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: ExpansionTile(
onExpansionChanged: (value) {
_isExpandedonline=value;
setState(() {});
},
children: <Widget>[
Text(
'Give a single gift, or schedule a recurring amount by using your Credit cards (i.e Mastercard, VISA, AMEX).'
'Note: Cornerstone uses the giving provider, Tithe.ly to securely process online donations from all over the world. Our Church will cover all associated fees for this service which are 2.5% + 15 cents (CAD) for all Credit Cards. AMEX is 3.5% + 30 cents (CAD). However, if you wish to cover the fees as well, you can click on the option to "Cover Fees".',style: TextStyle(
fontSize: 14,
),)
],
title: Row(
children: <Widget>[
Image.asset(
'images/online.png',
),
GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Online()),
);
},
child: Text(
'Online Giving',
style: TextStyle(
fontFamily: 'TT NORMS',
fontSize: 18,
fontWeight: FontWeight.w100,
color: _isExpandedonline ? Colors.amber[800] : Colors.black,
),
),
)
],
)),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: ExpansionTile(
onExpansionChanged: (value) {
_isExpandedpaypal=value;
setState(() {});
},
children: <Widget>[
Text(
'You can send your funds through PayPal to email livinghopetv@cornerstoneasianchurch.com',style: TextStyle(
fontSize: 14,
),)
],
title: Row(
children: <Widget>[
Image.asset(
'images/paypal.png',
),
Padding(
padding: EdgeInsets.only(left: 10),
child: Text(
'PAYPAL',
style: TextStyle(
fontFamily: 'TT NORMS',
color:_isExpandedpaypal ? Colors.amber[800] : Colors.black,
fontSize: 18,
fontWeight: FontWeight.w100,
),
),
),
GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => paypal()),
);
},
child: Image.asset(
'images/donatebutton.png',
height: 33,
),
)
],
)),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: ExpansionTile(
onExpansionChanged: (value) {
_isExpandedetransfer=value;
setState(() {});
},
children: <Widget>[
Text(
'You can send your funds via Interac E-Transfer to email*',style: TextStyle(
fontSize: 14,
),),
Text(
'
cacoffering@gmail.com',
style: TextStyle(
color: Colors.blue,
fontSize: 18,
),
),
Text(
'
This is an auto-deposit account
so you you do not have to set up any password.
Please do indicate the Purpose for your donation.
This service is only available within Canada.',style: TextStyle(
fontSize: 14,
),),
],
title: Row(
children: <Widget>[
Image.asset(
'images/etransfer.png',
height: 28,
),
Text(
'INTERAC E-TRANSFER',
style: TextStyle(
fontFamily: 'TT NORMS',
fontSize: 18,
fontWeight: FontWeight.w100,
color:_isExpandedetransfer? Colors.amber[800] : Colors.black,
),
),
],
)),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: ExpansionTile(
onExpansionChanged: (value) {
_isExpandedtexttogive=value;
setState(() {});
},
children: <Widget>[
Text('STEP 1: TEXT the word GIVE to',style: TextStyle(
fontSize: 14,
),),
Text(
'(844) 329-1637',
style: TextStyle(
color: Colors.red,
),
),
SizedBox(
height: 20,
),
Text(
'STEP 2: Complete the information on link received via TEXT for the first time only.',style:TextStyle(
fontSize: 14,
),),
SizedBox(
height: 20,
),
Text(
'STEP 3: Once you are setup for TEXT GIVING you can continue to TEXT the amount without having to fill your information again. Simply TEXT the amounti.e 10, 15 etc to the number directly.',style: TextStyle(
fontSize: 14,
),)
],
title: Row(
children: <Widget>[
Image.asset(
'images/text.png',
height: 30,
),
GestureDetector(
onTap: () {
customLaunch('sms:8443291637');
},
child: Padding(
padding: EdgeInsets.only(left: 10),
child: Text(
'TEXT TO GIVE',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w100,
fontFamily: 'TT NORMS',
color:_isExpandedtexttogive? Colors.amber[800] : Colors.black,
),
),
),
)
],
)),
),
],
),
),
),
),
),
);
}
}
Expanded小部件时，我也遇到了同样的问题。你可以分享一下你的代码吗？ - Yakhyo MashrapovExpanded并将mainAxisSize: MainAxisSize.max,添加到 Column 中即可。希望这能帮到您。 - Yakhyo Mashrapov