Flutter: Default Tab Bar Controller does not maintain state after swipe

Question

I am writing an application in flutter that has 4 tabbed views, kinda like the stock android phone app or clock app. One of those views hash a floating action button that wh

Answer 1

Variables in Flutter that are created inside a Stateful widget are updated weithin the change of the state. The state changes when you go to another view and then back. So what you can do is to define two variables. A temporary one that is just for the layout and one that is kept a little longer in storage. Pseudo Code:

var globalVar;
Stateful Widget...
var _temp;
setState({_temp=yourData; globalVar=yourData})
doSomethingWithYourText(_temp != null ? _temp : globalVar)

While you use the _temp var for all layout updates. The globalVar changes will not be noticable until the State resets (you change to another view).

So what this does is save your data in two vars and check wether the State was used before. If not it uses the var that was saved earlier.