flutter-构造方法给数组list默认空值 

1 class NewstStyle extends StatelessWidget {
2   final List<DkCenterUpload> upload;
3   const NewstStyle({
4     Key key,
5     this.upload: const [],
6   }) : super(key: key);

const []

posted @ 2021-01-22 08:37  mingV2020  阅读(1029)  评论(0)  编辑  收藏  举报