pop删除顶级窗口小部件。不确定在此之后加上逻辑是一个好主意。最好重新安排代码，例如
// Only gets SMS, no functionality
Future<String> getSmsCode(BuildContext context) {
return showDialog<String>(
context: context,
barrierDismissible: false,
builder: (BuildContext context) {
return AlertDialog(
title: Text('SMS ??? ??????'),
content: TextField(
onChanged: (value) {
this.smsCode = value;
},
),
contentPadding: EdgeInsets.all(10),
actions: <Widget>[
FlatButton(
child: Text('Done'),
onPressed: () {
Navigator.of(context).pop(this.smsCode);
},
)
],
);
},
);
}
SIGNIn() async {
String smsCode = await getSmsCode(context);
if (smsCode != null && !smsCode.isNotEmpty) {
print('User cancelled SMS dialog');
return;
}
final AuthCredential credential = PhoneAuthProvider.getCredential(
verificationId: verificationId,
smsCode: smsCode,
);
print('???');
FirebaseAuth _auth = FirebaseAuth.instance;
final FirebaseUser user = (await _auth.signInWithCredential(credential)).user;
final FirebaseUser currentUser = await _auth.currentUser();
assert(user.uid == currentUser.uid);
setState(() {
if (user != null) {
print('success!');
} else {
print('sign in Failed');
}
});
}
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