【发布时间】：2022-09-27 21:13:12
【问题描述】：
当我想打开这样说的产品页面时。
在构建 FutureBuilder(dirty, state: _FutureBuilderState#03644) 时引发了以下 NoSuchMethodError： 在 null 上调用了方法 \'[]\'。 接收方：空 尝试调用：
相关的导致错误的小部件是： FutureBuilder FutureBuilder:file:///E:/vscode/popkissofficial/lib/screens/product_page.dart:43:11
FutureBuilder(
future: _firebaseServices.productsRef.doc(widget.productId).get(),
builder: (context, snapshot) {
if (snapshot.hasError) {
return Scaffold(
body: Center(
child: Text(\"Error: ${snapshot.error}\"),
),
);
}
if (snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> documentData = snapshot.data.data();
List imageList = documentData[\'images\'];
List productSizes = documentData[\'size\'];
_selectedProductSize = productSizes[1];
return ListView(
padding: EdgeInsets.all(0),
children: [
ImageSwipe(
imageList: imageList,
),
Padding(
padding: const EdgeInsets.only(
top: 24.0,
left: 24.0,
right: 24.0,
bottom: 4.0,
),
child: Text(
\"${documentData[\'name\']}\",
style: Constants.boldHeading,
),
),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 4.0,
horizontal: 24.0,
),
child: Text(
\"\\Rp${documentData[\'price\']}\",
style: TextStyle(
fontSize: 18.0,
color: Theme.of(context).colorScheme.secondary,
fontWeight: FontWeight.w600,
),
),
),
Padding(
padding: const EdgeInsets.symmetric(
vertical: 8.0,
horizontal: 24.0,
),
child: Text(
\"${documentData[\'desc\']}\",
style: const TextStyle(
fontSize: 16.0,
),
),
),
const Padding(
padding: EdgeInsets.symmetric(
vertical: 24.0,
horizontal: 24.0,
),
child: Text(
\"Select Size\",
style: Constants.regularDarkText,
),
),
ProductSize(
productSizes: productSizes,
onSelected: (size) {
_selectedProductSize = size;
},
),
Padding(
padding: const EdgeInsets.all(24.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
GestureDetector(
onTap: () async {
await _addToSaved();
ScaffoldMessenger.of(context).showSnackBar(_snackBar);
},
child: Container(
width: 65.0,
height: 65.0,
decoration: BoxDecoration(
color: Color(0xFFDCDCDC),
borderRadius: BorderRadius.circular(12.0),
),
alignment: Alignment.center,
child: const Image(
image: AssetImage(
\"assets/images/tab_saved.png\",
),
height: 22.0,
),
),
),
Expanded(
child: GestureDetector(
onTap: () async {
await _addToCart();
ScaffoldMessenger.of(context).showSnackBar(_snackBar);
},
child: Container(
height: 65.0,
margin: EdgeInsets.only(
left: 16.0,
),
decoration: BoxDecoration(
color: Colors.black,
borderRadius: BorderRadius.circular(12.0),
),
alignment: Alignment.center,
child: const Text(
\"Add To Cart\",
style: TextStyle(
color: Colors.white,
fontSize: 16.0,
fontWeight: FontWeight.w600),
),
),
),
)
],
),
)
],
);
}
return Scaffold(
body: Center(
child: CircularProgressIndicator(),
),
);
},
),
CustomActionBar(
hasBackArrrow: true,
hasTitle: false,
hasBackground: false,
)
-
你能分享一下firebase对象图像吗？
-
请粘贴您的应用程序的实际代码和错误（在您的问题中）而不是代码的图像。
-
请编辑问题以将其限制为具有足够详细信息的特定问题，以确定适当的答案。
-
\"寻求调试帮助的问题 (\'为什么这段代码不起作用？\') 必须包含所需的行为，a具体问题或错误和必要的最短代码重现它在问题本身.没有的问题明确的问题陈述对其他读者没有用。见：How to create a Minimal, Complete, and Verifiable example.\"