Dart Flatter和Firestore:如何从有状态小部件访问变量以创建新文档?
我想使用无状态小部件中StatefulWidget的最后一个变量在Firestore中创建一个新文档 但我总是遇到同样的问题:在初始值设定项中只能访问静态成员 我的StatefulWidget代码:Dart Flatter和Firestore:如何从有状态小部件访问变量以创建新文档?,dart,google-cloud-firestore,flutter,Dart,Google Cloud Firestore,Flutter,我想使用无状态小部件中StatefulWidget的最后一个变量在Firestore中创建一个新文档 但我总是遇到同样的问题:在初始值设定项中只能访问静态成员 我的StatefulWidget代码: class UserProfile extends StatefulWidget { UserProfile({this.auth, this.onSignedOut, this.userID}); final BaseAuth auth; final VoidCallback onSi
class UserProfile extends StatefulWidget {
UserProfile({this.auth, this.onSignedOut, this.userID});
final BaseAuth auth;
final VoidCallback onSignedOut;
final String userID;
@override
_UserProfileState createState() => new _UserProfileState();
}
class _UserProfilState extends State<UserProfile> {
final DocumentReference userdocuments =
Firestore.instance.collection("Users").document(widget.userID); //Here i get the Error, because widget.userID
}
我的无状态小部件代码:
class UserProfile extends StatefulWidget {
UserProfile({this.auth, this.onSignedOut, this.userID});
final BaseAuth auth;
final VoidCallback onSignedOut;
final String userID;
@override
_UserProfileState createState() => new _UserProfileState();
}
class _UserProfilState extends State<UserProfile> {
final DocumentReference userdocuments =
Firestore.instance.collection("Users").document(widget.userID); //Here i get the Error, because widget.userID
}
class\u UserProfilState扩展状态{
最终文档参考用户文档=
Firestore.instance.collection(“Users”).document(widget.userID);//这里我得到了错误,因为widget.userID
}
我的问题是:如何使用StatefulWidget中的userID变量基于userID创建新文档。感谢我们的帮助您可以在
initState
方法中获取值
class _UserProfilState extends State<UserProfile> {
DocumentReference userdocuments;
@override
void initState() {
userdocuments =
Firestore.instance.collection("Users").document(widget.userID);
super.initState();
}
}
class\u UserProfilState扩展状态{
文件参考文件;
@凌驾
void initState(){
用户文档=
Firestore.instance.collection(“用户”).document(widget.userID);
super.initState();
}
}