![](/img/trans.png)
[英]Undefined name 'DefaultfirebaseOptions'. Try correcting the name to one that is defined, or defining the name
[英]The method 'data' isn't defined for the type 'Object'. Try correcting the name to the name of an existing method, or defining a method named 'data'
我在顯示來自 Firebase 的數據時遇到問題。這是我在 FutureBuilder 中使用的代碼。 看起來有關於 data() 的錯誤,但我不知道是哪一個,有人知道嗎?
這就是我得到的:“未為類型‘對象’定義方法‘數據’。嘗試將名稱更正為現有方法的名稱,或定義名為‘數據’的方法。”
if(snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> documentData = snapshot.data!.data() as Map<String, dynamic>;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
您正在使用QuerySnapshot
的代碼。 對於這樣的代碼,您的代碼可以工作,但考慮到您如何使用您收到的結果數據DocumentSnapshot
。 為此,只需將您的代碼更改為:
if(snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> documentData = snapshot.data as Map<String, dynamic>;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
如果有人是我的情況,我已經找到了解決方案:
builder: (context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if(snapshot.connectionState == ConnectionState.done) {
DocumentSnapshot<Object?> documentData = snapshot.data!;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
}
future: collection.doc(documentId).get(),
builder: ((context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> data =
snapshot.data!.data() as Map<String, dynamic>;
String currency = '${data['currency']}';
return Material(
)
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