在点击列表中查看项目扑动

您好，我是新手，我需要帮助，我有下一个代码，但我想从单击的项目中获取数据，我需要获取卡的featureString：变量，为此，我正在使用return InkWell（onTap：（）{但我无法访问数据。如果有人可以帮助我！

先感谢您！

这是我的代码：

class Features extends StatelessWidget {



  List<_FeaturePhoto> _feature() {
    return [
      _FeaturePhoto(imageURL: '',
          subtitle: 'I love cat',
          featureString: 'Cat'),
      _FeaturePhoto(imageURL: '',
          featureString: 'bird'),
      _FeaturePhoto(imageURL: '',
          title: 'Rabit',
          featureString: 'rabit'),
    ];
  }


  @override
  Widget build(BuildContext context) {


    **return InkWell (
        **onTap: () {
         Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));
          //here I need to get the data from the card item that I clicked
        },****
    child: Container(
        height: 320,
        width: 220,

        child: ListView(

            scrollDirection: Axis.horizontal,
            padding: EdgeInsets.all(10.0),
            children: _feature().map<Widget> ( (photo) {
              return _FeatureGridItem(featurePhoto: photo);
              //Feature(photo);
            }).toList()
        )
    ));

  }
}

class _FeaturePhoto{
  _FeaturePhoto({
    this.imageURL,
    this.title,
    this.subtitle,
    this.featureString
  });
  final String imageURL;
  final String title;
  final String subtitle;
  final String featureString;
}


class _FeatureGridItem extends StatelessWidget {
  _FeatureGridItem({
    Key key,
    @required this.featurePhoto
  }) : super ( key: key);

  final _FeaturePhoto featurePhoto;
  @override
  Widget build(BuildContext context) {


    return Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget> [

          Card(
            semanticContainer: true,
            clipBehavior: Clip.antiAliasWithSaveLayer,
            child: Stack(
              children: <Widget>[

                Image.network(featurePhoto.imageURL,
                    width: 230,
                    height: 230,
                    fit: BoxFit.cover),
                Positioned(
                    top: 175,
                    left: 10,
                    child: Container(
                      height: 25,
                      width: 100,
                      child: Center(
                        child: Text( featurePhoto.featureString,
                          style: TextStyle(color: Colors.white, fontSize: 18.0, fontWeight: FontWeight.bold),
                        ),
                      ),
                    )
                )
              ],
            ),
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(10.0)
            ),
            elevation: 5,
            margin: EdgeInsets.all(10),

          ),
        ]
    );
  }

}