Firebase Phone Auth(flutt)在某些iOS设备中不起作用

我使用firebase phone auth在flutter应用程序中实现了电话号码身份验证。它在安卓系统中运行良好。但它在iOS中无法正常工作,因为许多用户在提交短信验证代码后面临错误,尽管许多其他用户使用该应用程序非常好。出现这种情况的可能原因是什么?我已经提交了下面的代码。

数字提交

void _verifyPhoneNumber() async {

final PhoneVerificationCompleted verificationCompleted =
    (AuthCredential phoneAuthCredential) async {

  final FirebaseUser user =
      await _auth.signInWithCredential(phoneAuthCredential);

  if (user != null) {
    phone = user.phoneNumber;
    fid = user.uid;
    saveLogin(context);
  } else {
    _showErrorDialog("User Verification Error!");
  }
};

final PhoneVerificationFailed verificationFailed =
    (AuthException authException) {
  _showErrorDialog("Phone Verification Failed");
};

final PhoneCodeSent codeSent =
    (String verificationId, [int forceResendingToken]) async {
  _verificationId = verificationId;
  setState(() {
    _title = "Verify SMS Code";
    phoneInput = false;
    phoneSubmit = false;
    codeInput = true;
    codeSubmit = true;
  });
};

final PhoneCodeAutoRetrievalTimeout codeAutoRetrievalTimeout =
    (String verificationId) async {
  _verificationId = verificationId;
  setState(() {
    _title = "Verify SMS Code";
    phoneInput = false;
    phoneSubmit = false;
    codeInput = true;
    codeSubmit = true;
  });
};

await _auth.verifyPhoneNumber(
    phoneNumber: "+880" + _mobileNumber,
    timeout: const Duration(seconds: 5),
    verificationCompleted: verificationCompleted,
    verificationFailed: verificationFailed,
    codeSent: codeSent,
    codeAutoRetrievalTimeout: codeAutoRetrievalTimeout);
  }

代码提交

void _signInWithPhoneNumber(String _code) async {

final AuthCredential credential = PhoneAuthProvider.getCredential(
  verificationId: _verificationId,
  smsCode: _code,
);
final FirebaseUser user = await _auth.signInWithCredential(credential);
if (user != null) {
  phone = user.phoneNumber;
  fid = user.uid;
  saveLogin(context);
} else {
  _showErrorDialog("User Verification Error!");
}
  }

使用的插件

谷歌登录:^4.0.1+3

firebase认证:^0.11.0