Hello,
I have an app which aim is adding instructions.
I have one screen where I have add an instruction:

Then I have another screen with gallery named Instruction List :

And I want allow users editing instruction on another screen . So by clicking in symbol > they should be navigate to another screen where I want to put a form, allow editing and submit changes in the same item.
I create third screen :

In the third screen I have some data card only for view and some for edit. in a button "zatwierdź zmiany" I want to create funcion for sumbit changes, buy it doesn't work
Could you help me to do that ?