为什么我的窗口小部件仅加载而不返回数据? [英] Why my widget is only loading and not returning data?

问题描述

我试图弄清楚为什么我的小部件只加载而不给数据提供代码

Im trying to figuring our why my widget is only loading and not giving data heres the code

  Stream myVideos;
    int videos = 0;
 getalldata() async {
    String myID = FirebaseAuth.instance.currentUser.uid;
    //get videos as future
    myVideos = FirebaseFirestore.instance.collection('videos').snapshots();

    var documents = FirebaseFirestore.instance.collection('videos').snapshots();
    videos = await documents.length;

    await for (var snapshot in documents) {
      for (var doc in snapshot.docs) {
        likes = doc.data()['likes'].length + likes;
      }
    }
    var followersdocuments = FirebaseFirestore.instance
        .collection("meinprofilsettings")
        .doc(myID)
        .collection('followers')
        .snapshots();
    var followingdocuments = FirebaseFirestore.instance
        .collection("meinprofilsettings")
        .doc(myID)
        .collection('following')
        .snapshots();

    followers = await followersdocuments.length;
    following = await followingdocuments.length;

    setState(() {
      dataisthere = true;
    });
  }

  Widget getBody(BuildContext context) {
    return dataisthere == false
        ? Scaffold(body: Center(child: CircularProgressIndicator()))
        : Stack(children: <Widget>[
            Scaffold(
              key: _scaffoldKey,
              appBar: AppBar(
                backgroundColor: Colors.transparent,
                elevation: 0.0,
                title: Text("Search App"),
                actions: [
                  IconButton(
                    icon: Icon(Icons.search),
                    onPressed: () {
                      Navigator.of(context)
                          .pushNamed(Searchuserinhomepage.route);
                    },
                  ),
                  IconButton(
                    icon: Icon(Icons.camera_alt_sharp),
                    onPressed: () {
                      showPickOptionsDialog(context);

                      //  _showPickOptionsDialog(context);
                    },
                  ),
                ],
              ),
              drawer: Seitenleiste(),
              body: RefreshIndicator(
                onRefresh: _handleRefresh,
                color: Colors.black,
                strokeWidth: 4,
                child: ListView(children: [
                  Column(
                    children: <Widget>[
                      Allcategories(),
                      SizedBox(
                        height: 5,
                      ),
                      StreamBuilder(
                          stream: myVideos,
                          builder: (context, snapshot) {
                            if (snapshot.connectionState ==
                                ConnectionState.waiting) {
                              return Center(child: CircularProgressIndicator());
                            }
                            if (videos >0) {

Ans发生的事情是它唯一的加载如果您需要更多信息，请发表评论.如果您还需要更多代码，请留下评论.我想要的是将视频流式传输.在我认为它们是未来之前，但不是那时，应该成为潮流，但是我错了什么?

Ans what happen is its only loading If you need more information please leave a comment . If you need more code also please leave comment . What I want is getting the videos as a stream . before they was a future but not then should be a stream I think but what do I wrong ?

推荐答案

您的代码正在获取 .snapshots()，但实际上并没有通过调用数据提取.listen()调用.

Your code is getting the .snapshots() but it is not then actually invoking the fetching of the data via the .listen() call.

请在收听实时更改中查看整个部分.

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