GirdView的加载几种方式
参考别人的使用方式
不过这些 都不能显示。通过百度寻找，找到一个方法如下：
试过四种办法只有这两种加上
shrinkWrap: true
属性后才能显示对应布局
如果是ListView 嵌套 GridView 就直接使用,不能使用 Flexible（使用就不显示布局）,例如：
贴上代码 （创建一个Dart 直接运行）
import 'package:flutter/material.dart';
class ShopPageFragment extends StatefulWidget{
@override
State<StatefulWidget> createState() {
// TODO: implement createState
return new _ShopFragment();
}
}
class _ShopFragment extends State<ShopPageFragment>{
@override
Widget build(BuildContext context) {
// TODO: implement build
return new Column(
children: <Widget>[
_shopTilte("精品推荐"),
new Flexible(
flex: 1,
child: _List(),
)
],
);
}
//第一种
_List(){
return new GridView.count(crossAxisCount: 3,
primary: false,
children: _getGrid(),
shrinkWrap: true,
);
}
//第二种
_Gird1(){
return new GridView.custom(gridDelegate: new SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
),
childrenDelegate: new SliverChildBuilderDelegate(
(context,index){
return new Image.asset("images/homes.jpg");
},
childCount: 30,
),
shrinkWrap: true,
);
}
//第三种
_GirdExtent(){
return new SliverGrid.extent(maxCrossAxisExtent: 1080.0,
mainAxisSpacing: 8.0,
children: _getGrid(),
);
}
//第四种
_GridScoll(){
return new CustomScrollView(
primary: false,
slivers: <Widget>[
new SliverPadding(padding: const EdgeInsets.all(8.0),
sliver: new SliverGrid.count(crossAxisCount: 3,
children: _getGrid(),
),
),
],
shrinkWrap: true,
);
}
List<Widget> _getGrid(){
List<Widget> gridList = new List();
//gridList.add(_shopTilte("精品推荐"));
for(int i =0;i<6;i++){
gridList.add(_viewGird());
}
return gridList;
}
Widget _shopTilte(String title){
return
new Row(
children: <Widget>[
new Container(
margin: new EdgeInsets.only(
left: 10.0,
),
color: Colors.green,
width: 5.0,
height: 30.0,
),
new Container(
margin: const EdgeInsets.only(
left: 10.0,
),
),
new Text(title,
textAlign: TextAlign.left,
style: const TextStyle(
fontSize: 14.0,
color: Colors.black,
fontStyle: FontStyle.normal,
),
),
],
);
}
Widget _viewGird(){
return new Column(
children: <Widget>[
//图片
new Image.asset("images/main_discount.png",
width: 60.0,
height: 60.0,
),
//名字
new Text("轮胎",
style: const TextStyle(
fontSize: 14.0,
color: Colors.black,
),
textAlign: TextAlign.center,
),
//价格
new Text("￥1500.0",
style: const TextStyle(
fontSize: 14.0,
color: Colors.amberAccent,
),
textAlign: TextAlign.center,
),
],
);
}
}
