Looking up a deactivated widget's ancestor is unsafe

Question

I am new in Flutter and I am trying receive data with a Dialog. When a click in textField the error of image2 appear...

Answer 1

You’re trying to access a context that isn’t probably available. That happens because you’ve assigned your Dialog to a var and afterwards use a different context (the one from your dialog builder).

Either create your dialog directly after your return in the builder or make it a method instead that returns a Dialog and pass it a BuildContext parameter.

Widget myDialog(BuildContext context) => Dialog(/*your dialog here*/);

This is also a more convenient Flutter practice. You should use methods that return widgets instead of assigning it to variables.