【发布时间】：2021-04-09 22:08:27
【问题描述】：
嘿，我想制作水平 ListView.builder 但它显示错误“BoxConstraints 强制和无限宽度”。实际上我想制作一个像 Fiverr 这样的“买家请求”页面。 我使用 PageView.builder 实现了我的目标，但是当我使用时
if(snapshot.connectionState == ConnectionState.waiting)
return SpinKitDoubleBounce(color: kPrimaryColor);
每当我滑动到下一个索引时，它都会让我回到第一个索引。
所以我想改用 ListView.builder。这是我的代码：（希望有人能解决我的问题）
if (snapshot.hasData)
return SizedBox(
child: ListView.builder(
// scrollDirection: Axis.horizontal,
itemCount: indexLength,
controller: PageController(viewportFraction: 1.0),
// onPageChanged: (int index) => setState(() => _index = index),
itemBuilder: (_, i) {
return SingleChildScrollView(
child: Card(
margin: EdgeInsets.all(10),
child: Wrap(
children: <Widget>[
ListTile(
leading: CircleAvatar(
backgroundColor: kPrimaryColor.withOpacity(0.8),
backgroundImage: AssetImage('assets/images/nullUser.png'),
child: snapshot.data[i]['PhotoURL'] != null
? ClipRRect(
borderRadius: BorderRadius.circular(50),
child:
Image.network(snapshot.data[i]['PhotoURL'],
width: 50,
height: 50,
fit: BoxFit.cover,),
)
: ClipRRect(
borderRadius: BorderRadius.circular(50),
child:
Image.asset('assets/images/nullUser.png',
width: 50,
height: 50,
fit: BoxFit.cover,),
)
),
title: Text(
snapshot.data[i]['Email'],
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w700,
color: Colors.black.withOpacity(0.7),
),
),
subtitle: Text(
snapshot.data[i]['Time'],
style: TextStyle(
color: Colors.black.withOpacity(0.6)),
),
),
Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5)),
color: Colors.grey[200],
),
padding: EdgeInsets.all(10),
child: Text(
snapshot.data[i]['Description'],
style: TextStyle(
color: Colors.black.withOpacity(0.6)),
),
),
SizedBox(
height: 8,
),
Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5)),
border:
Border.all(color: Colors.grey[300])),
child: ListTile(
leading: Icon(Icons.category_outlined),
title: Text(
'Category : ${snapshot.data[i]['Category']}',
style: TextStyle(
fontSize: 14,
color: Colors.grey,
),
),
),
),
SizedBox(height: 8),
Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5)),
border:
Border.all(color: Colors.grey[300])),
child: ListTile(
leading: Icon(Icons.location_pin),
title: Text(
snapshot.data[i]['Location'],
style: TextStyle(
fontSize: 14,
color: Colors.grey,
),
),
),
),
SizedBox(height: 8),
Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5)),
border:
Border.all(color: Colors.grey[300])),
child: ListTile(
leading: Icon(
Icons.attach_money,
color: kGreenColor,
),
title: Text(
'Budget : Rs.${snapshot.data[i]['Budget']}',
style: TextStyle(
fontSize: 14,
color: kGreenColor,
),
),
),
),
SizedBox(height: 8),
Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5)),
border:
Border.all(color: Colors.grey[300])),
child: ListTile(
leading: Icon(Icons.timer),
title: Text(
'Duration : ${snapshot.data[i]['Duration']}',
style: TextStyle(
fontSize: 14,
color: Colors.grey,
),
),
),
),
SizedBox(
height: 35,
),
sendOfferButton(),
SizedBox(
height: 15,
),
Center(
child: Text(
"${i + 1}/$indexLength",
style: TextStyle(fontSize: 13),
),
),
],
),
),
],
),
),
);
},
),
);
如果有人想查看完整文件。 Check it Here
【问题讨论】：
-
将宽度：MediaQuery.of(context).size.width 添加到您的大小框
-
根本不起作用
标签： firebase flutter listview flutter-layout flutter-pageview