显示搜索来自firebase的Flutter问题.位置参数太多

Question

你好，我的代码有问题。我想显示一个来自firebase的用户列表，但最后我被卡住了。代码行应该是这样的：

userName: searchSnapshopt.documents[index].data["name"]);

但是在更新之后，不再有文档；docs"；它为我分解了所有的

这是我的代码

class _SearchScrState extends State<SearchScr> {
DatabaseMethods databaseMethods = new DatabaseMethods();
TextEditingController searchTextEditingController =
new TextEditingController();
QuerySnapshot searchSnapshopt;
initiateSearch() {
databaseMethods
.getUserByUsername(searchTextEditingController.text)
.then((val) {
setState(() {
searchSnapshopt = val;
});
});
}
Widget searchList() {
return searchSnapshopt != null
? ListView.builder(
itemCount: searchSnapshopt.docChanges.length,
shrinkWrap: true,
itemBuilder: (context, index) {
return SearchTile(
userName: searchSnapshopt.docs[0].data("name"));
})
: Container();
}

Answer 1

好的，我有一个解决方案，只需更改这个

userName: searchSnapshopt.docs[index].data("name")

到此：

userName: searchSnapshopt.docs[index].get("name")

现在使用

Answer 2

试试这个：

class _SearchScrState extends State<SearchScr> {
DatabaseMethods databaseMethods = new DatabaseMethods();
TextEditingController searchTextEditingController =
new TextEditingController();
QuerySnapshot searchSnapshopt;
initiateSearch() {
databaseMethods
.getUserByUsername(searchTextEditingController.text)
.then((val) {
setState(() {
searchSnapshopt = val;
});
});
}
Widget searchList() {
return searchSnapshopt != null
? ListView.builder(
itemCount: searchSnapshopt.docChanges.length,
shrinkWrap: true,
itemBuilder: (context, index) {
return SearchTile(
userName: searchSnapshopt.docs[index].get("name"));
})
: Container();
}