我有这张卡,我想使任何图像都占据该卡的全宽,我尝试将width设置为double.infinity和3000,但它不起作用。我也想在图像的顶部写上文字吗?如果这样做会影响应用程序性能吗?
return Card(
clipBehavior: Clip.antiAlias,
elevation: 5,
margin: EdgeInsets.fromLTRB(10, 20, 10, 24),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Expanded(
flex: 8,
child: new Container(
width: double.infinity,
child: ClipRRect(
borderRadius: BorderRadius.circular(4.0),
child: CachedNetworkImage(
fadeInDuration: Duration(milliseconds: 2000),
width: 3000,
imageUrl:
'https://images.alphacoders.com/560/thumb-350-560228.jpg',
placeholder: (context, url) =>
new CircularProgressIndicator(),
),
),
),
),
new Expanded(
flex: 2,
child: new Container(
child: MaterialButton(
minWidth: double.infinity,
color: Color(orange),
onPressed: () {},
child: Text(
'Read More',
style: TextStyle(color: Colors.white),
),
),
color: Colors.green,
))
],
),
);
CachedNetworkImage(
imageUrl: "http://via.placeholder.com/200x150",
imageBuilder: (context, imageProvider) => Container(
decoration: BoxDecoration(
image: DecorationImage(
image: imageProvider,
fit: BoxFit.cover,
colorFilter:
ColorFilter.mode(Colors.red, BlendMode.colorBurn)),
),
),
placeholder: (context, url) => CircularProgressIndicator(),
errorWidget: (context, url, error) => Icon(Icons.error),
),```
Check out this in which fit parameter will solve your question
如果您要使其适合宽度
改用Boxfit.fitWidth