/***

 * 列表GridView

 */

class  UITest3_GridView extends StatelessWidget{

  List<Container> buildGridList(int count){

    return new List<Container>.generate(count,

    (int index) =>

      new Container(

        child:  new Image.asset("images/lake.jpg"),

      )

    );

  }

  Widget builGrid(){

    return new GridView.extent(

      maxCrossAxisExtent: 150.0,

      padding: EdgeInsets.all(4),

      mainAxisSpacing: 4,

      crossAxisSpacing: 4,

      children:  buildGridList(30)

    );

  }

  @override

  Widget build(BuildContext context) {

    // TODO: implement build

    return new Scaffold(

      appBar: AppBar(

        title: new Text("GridView"),

      ),

      body: new Center(

        child: builGrid(),

      ),

    );

  }

}