在CustomScrollView中使用StreamBuilder和SliverLists [英] Using a StreamBuilder and a SliverLists In CustomScrollView

问题描述

我正在尝试使用 StreamBuilder 来获取数据，我想使用 SliverList 全部显示该数据在 CustomScrollView 内，因此我可以利用 CustomScrollView 附带的功能。

I am trying to use a StreamBuilder to fetch data and I want to display that data using a SliverList all inside a CustomScrollView so I can take advantage of the features that come with the CustomScrollView.

关于如何实现此目标的任何想法？

Any ideas on how I can achieve this?

推荐答案

很简单，这里有一个代码示例：

Sure, it's easy, here you have a code sample:

    class SampleStreamBuilder extends StatelessWidget {
      Stream<List<String>> loadData() async* {
        await Future.delayed(Duration(seconds: 3));
        yield List.generate(10, (index) => "Index $index");
      }

      @override
      Widget build(BuildContext context) {
        return Scaffold(
          body: StreamBuilder<List<String>>(
            stream: loadData(),
            builder: (context, snapshot) {
              return snapshot.hasData
                  ? CustomScrollView(
                      slivers: [
                        SliverList(
                          delegate: SliverChildBuilderDelegate((context, index) {
                            return ListTile(
                              title: Text(snapshot.data[index]),
                            );
                          }, childCount: snapshot.data.length),
                        )
                      ],
                    )
                  : Center(
                      child: CircularProgressIndicator(),
                    );
            },
          ),
        );
      }
    }

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