如果底部工作表出现在屏幕上，我希望禁用后退按钮。当我使用 will pop 范围时，它向我显示 Future（动态不能分配给 Widget）的错误。我该如何解决这个问题 1. 如果屏幕底部出现我希望禁用后退按钮。当我使用 will pop 范围时，它向我显示 Future（动态不能分配给 Widget）的错误。我该如何解决这个问题 1. 如果屏幕底部出现我希望禁用后退按钮。当我使用 will pop 范围时，它向我显示 Future（动态不能分配给 Widget）的错误。我该如何解决这个问题
if (_registerModel.status == "success") {
saveUserIDToSharedPreference(
"userID", _registerModel.id);
String displayToast =
"Registration successful \n OTP is ${_registerModel.otp}";
Fluttertoast.showToast(
msg: displayToast,
toastLength: Toast.LENGTH_LONG,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
);
buildShowEnterOTPModalBottomSheet(
context,
size,
email,
password,
_registerModel.id,
_registerModel.otp);
}
Future buildShowEnterOTPModalBottomSheet(
BuildContext context, Size size, String email, int id) {
VerifyOtpModel _verifyOtpModel;
final TextEditingController otpController = TextEditingController();
return showModalBottomSheet(
isDismissible: false,
enableDrag: false,
isScrollControlled: true,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(top: Radius.circular(20.0)),
),
context: context,
builder: (context) {
return AnimatedPadding(
duration: Duration(milliseconds: 150),
curve: Curves.easeOut,
padding: EdgeInsets.only(
bottom: MediaQuery.of(context).viewInsets.bottom),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Padding(
padding: const EdgeInsets.fromLTRB(0, 24.0, 0, 18.0),
child: Container(
width: 80.0,
height: 80.0,
child: Image.asset(
"assets/images/send_email.png",
fit: BoxFit.fitHeight,
height: 80,
width: 80,
),
),
),
Text(
'Verify your email ID',
style: TextStyle(
color: Color(0xFF707070),
fontFamily: 'simply_rounded',
fontSize: 16.0),
),
Padding(
padding: const EdgeInsets.fromLTRB(32.0, 8.0, 32.0, 16.0),
child: Text(
"Please enter 4 digit code send to\n" + email,
style: TextStyle(
color: const Color(0xFF707070),
fontSize: 14.0,
fontWeight: FontWeight.w500,
fontFamily: 'montserrat_medium',
),
textAlign: TextAlign.center,
),
),
Padding(
padding: const EdgeInsets.fromLTRB(32.0, 0, 32.0, 24.0),
child: Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15.0),
),
color: Colors.white,
elevation: 20,
child: Padding(
padding: const EdgeInsets.fromLTRB(32.0, 0, 32.0, 8.0),
child: OTPTextField(
margin: EdgeInsets.only(bottom: 10.0),
length: 4,
width: MediaQuery.of(context).size.width,
fieldWidth: 40,
style: TextStyle(
fontSize: 17,
),
textFieldAlignment: MainAxisAlignment.spaceAround,
fieldStyle: FieldStyle.underline,
onCompleted: (pin) {
print("Completed: " + pin);
otpController.text = pin;
},
onChanged: (pin) {
print("Changed: " + pin);
otpController.text = pin;
},
),
),
),
),
Text(
"resend code",
style: TextStyle(
color: Color(0xFF1FC27F),
fontSize: 14.0,
fontFamily: 'montserrat_medium',
decoration: TextDecoration.underline,
),
textAlign: TextAlign.center,
),
InkWell(
onTap: () async {
if (otpController.text.length <= 3) {
Fluttertoast.showToast(
msg: "Invalid OTP!",
toastLength: Toast.LENGTH_LONG,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
);
} else {
showLoaderDialog(context);
final String otp = otpController.text;
developer.log('verify otp' + 'values',
error: "otp " + otp + " id " + id.toString());
VerifyOtpModel verifyOtpModel =
await APIServices().verifyOtp(otp, id);
setState(() {
_verifyOtpModel = verifyOtpModel;
Navigator.pop(context);
Navigator.pop(context);
});
if (_verifyOtpModel.status == "success") {
String displayToast = "Verification successful !";
Fluttertoast.showToast(
msg: displayToast,
toastLength: Toast.LENGTH_LONG,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
);
buildShowSuccessOTPModalBottomSheet(context, size);
}
if (_verifyOtpModel.status == null) {
String failureToast = "Verification Failed !";
Fluttertoast.showToast(
msg: failureToast,
toastLength: Toast.LENGTH_LONG,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
);
buildShowFailureOTPModalBottomSheet(context, size);
}
}
},
child: Padding(
padding: const EdgeInsets.fromLTRB(0, 16.0, 0, 24.0),
child: Container(
height: 55.0,
width: size.width * 0.6,
decoration: kInputBoxDecorationGreenStyle,
child: Align(
alignment: Alignment.center,
child: Text(
"Verify and register".toUpperCase(),
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.white,
fontFamily: 'simply_rounded',
fontSize: 17,
),
),
),
),
),
),
],
),
);
});
}