Firebase 当用户离开页面时，颤振剖面图消失
伙计们，我真的需要这方面的帮助，我在我的用户配置文件页面中实现了一个上传配置文件图片，一切正常，唯一的问题是当用户离开此屏幕并返回到同一特定屏幕时，上传的图像立即消失 期待您的回复，谢谢 这是处理所选文件和图片上传的代码Firebase 当用户离开页面时，颤振剖面图消失,firebase,flutter,dart,flutter-layout,flutter-animation,Firebase,Flutter,Dart,Flutter Layout,Flutter Animation,伙计们，我真的需要这方面的帮助，我在我的用户配置文件页面中实现了一个上传配置文件图片，一切正常，唯一的问题是当用户离开此屏幕并返回到同一特定屏幕时，上传的图像立即消失 期待您的回复，谢谢 这是处理所选文件和图片上传的代码 class _UserProfileState extends State<UserProfile> { DocumentSnapshot userDoc; File _image; String _uploadedFileURL; Future
class _UserProfileState extends State<UserProfile> {
DocumentSnapshot userDoc;
File _image;
String _uploadedFileURL;
Future chooseFile() async {
await ImagePicker.pickImage(source: ImageSource.gallery).then((image) {
setState(() {
_image = image;
});
});
uploadImage(_image);
}
Future<String> uploadImage(var imageFile) async {
StorageReference ref = FirebaseStorage.instance
.ref()
.child('chats/${Path.basename(_image.path)}}');
StorageUploadTask uploadTask = ref.putFile(imageFile);
var dowurl = await (await uploadTask.onComplete).ref.getDownloadURL();
_uploadedFileURL = dowurl.toString();
return _uploadedFileURL;
}
为什么不尝试缓存NetworkImage？谢谢，但我已经尝试过了，仍然没有成功，我认为问题在于每次重新访问页面时，firestore上传的图片都是空的，这使得它将另一个占位符图片设置为其图片，似乎无法找到任何代码来修复该问题_上载的文件URL！=无效的CachedNetworkImage（imageUrl:_uploadedFileURL，：Image.asset（'assets/avatar_profile.jpg'），`您在配置文件小部件中的哪里设置
\u uploadedFileURL@override
Widget build(BuildContext context) {
var firebaseUser = FirebaseAuth.instance.currentUser;
return StreamBuilder(
stream: FirebaseFirestore.instance
.collection('user_profile')
.doc(firebaseUser.uid)
.snapshots(),
builder: (context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if (!snapshot.hasData) {
return Center(child: CircularProgressIndicator());
}
userDoc = snapshot.data;
return SafeArea(
child: Scaffold(
floatingActionButton: FloatingActionButton(
child: Icon(
Icons.edit,
color: Colors.white,
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return EditUserProfile(userData: userDoc);
},
),
);
},
),
body: SafeArea(
child: Container(
padding: EdgeInsets.only(top: 10),
child: Column(
children: [
Align(
alignment: Alignment.centerLeft,
child: IconButton(
onPressed: () {
Navigator.pushNamed(context, Homepage.id);
},
icon: Icon(
Icons.arrow_back,
color: Colors.white,
size: 30,
),
),
),
GestureDetector(
onTap: chooseFile,
child: Stack(
children: [
CircleAvatar(
radius: 70,
backgroundColor: Colors.transparent,
child: Container(
child: _uploadedFileURL == null
? ImageBeforeUpload(
image: _image, //This shows immediately when user chooses an image
// onTap: chooseFile,
)
: ImageUploaded(
uploadedFileURL: _uploadedFileURL // //This shows when image has been uploaded successfully but disappears when user leaves page and come back to this page
),
),
),
Positioned(
bottom: 0,
right: 0,
child: CircleAvatar(
backgroundColor: Colors.white60,
radius: 25,
child: IconButton(
onPressed: chooseFile,
icon: Icon(Icons.edit, color: Colors.blueGrey),
),
),
)
],
),
),
SizedBox(
height: 10,
),
IntrinsicHeight(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
userDoc.data()['nickname'] ?? '',
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.w900),
),
VerticalDivider(
thickness: 3,
width: 20,
color: Colors.white,
),
Text(
userDoc.data()['age'] ?? '',
style: TextStyle(
color: Colors.white,
),
),
],
),
),
Padding(
padding: const EdgeInsets.all(20.0),
child: Card(
child: Column(
children: [
ListTile(
leading: Icon(
Icons.person,
size: 40,
),
title: Text("About me"),
isThreeLine: false,
dense: true,
subtitle: Text(userDoc.data()['aboutMe'] ?? ''),
trailing: Icon(Icons.arrow_right),
)
],
),
),
),
Expanded(
child: Container(
width: 400,
child: ListView(
children: [
ProfileListTile(
leading: Icons.phone_in_talk,
title: 'Phone Number',
subtitle: userDoc.data()['mobile'] ?? '',
),
ProfileListTile(
leading: Icons.add_location,
title: 'Current Location',
subtitle: userDoc.data()['location'] ?? '',
),
ProfileListTile(
leading: FontAwesomeIcons.heartbeat,
title: 'Relationship Status',
subtitle: userDoc.data()['maritalStatus'] ?? '',
),
ProfileListTile(
leading: Icons.people,
title: 'Gender',
subtitle: userDoc.data()['gender'] ?? '',
),
ProfileListTile(
leading: Icons.looks,
title: 'Interested In',
subtitle: userDoc.data()['interestedIn'] ?? '',
),
// Padding(
// padding: const EdgeInsets.symmetric(
// horizontal: 50.0, vertical: 10),
// child: Row(
// mainAxisAlignment:
// MainAxisAlignment.spaceBetween,
// children: [
// Column(
// children: [
// IconButton(
// icon: Icon(Icons.phone,
// color: Colors.white),
// onPressed: null),
// Text(
// 'Call Me',
// style: klistTileTitle,
// ),
// ],
// ),
// Column(
// children: [
// IconButton(
// icon: Icon(Icons.message,
// color: Colors.white),
// onPressed: null),
// Text(
// 'Message',
// style: klistTileTitle,
// )
// ],
// ),
// Column(
// children: [
// IconButton(
// icon: FaIcon(
// FontAwesomeIcons.whatsapp,
// color: Colors.white,
// ),
// onPressed: () async {}),
// Text('Whatsapp', style: klistTileTitle)
// ],
// ),
// ],
// ),
// )
],
),
),
),
],
),
),
),
),
);
},
);
class ImageUploaded extends StatelessWidget {
ImageUploaded({this.uploadedFileURL});
final String uploadedFileURL;
@override
Widget build(BuildContext context) {
return CircleAvatar(
radius: 80,
child: ClipOval(
child: uploadedFileURL != null
? Image.network(uploadedFileURL,
height: 200, width: 200, fit: BoxFit.fill)
: Image.asset('assets/avatar_profile.jpg'),
),
);
}
}
class ImageBeforeUpload extends StatelessWidget {
ImageBeforeUpload({this.image});
final File image;
@override
Widget build(BuildContext context) {
return GestureDetector(
child: CircleAvatar(
radius: 70,
child: ClipOval(
child: image != null
? Image.asset(image.path,
height: 200, width: 200, fit: BoxFit.fill)
: Image.asset('assets/avatar_profile.jpg'),
),
),
);
}
}