如何以编程方式从Bloc更改Flutter中的步进器？

Question

I'm using flutter_bloc and I'm trying to work out how to change the current step in a Stepper while conforming to the Bloc pattern. I have only been successful using setState() but this feels like the wrong thing to do when using Bloc.

Essentially I have two forms in two steps, which take place in a stepper. I would want the details from the first step (two textboxes) to be validated as per certain rules, and then the "current step" in the Stepper to be changed accordingly. I have set up a listener on the page that contains the stepper, and it is recieving events okay, but changing the active step isn't rebuilding the widget tree. I'm a bit stuck :( Any help would be great.

Edit: I can change the currentstep in the view layer (as in the integer where the currentStep is stored) but the visuals on the Stepper are not updated. They are updated if I call setState (but it feels like this is the wrong thing to do in Bloc).

Answer 1

您可以查看此要点 ，以获取有关如何在flutter_bloc中使用步进器的示例