Hi All! I'm injecting a "presenter" object into my...

# koin-contributors

[sendoav]

Hi All! I'm injecting a "presenter" object into my compose views and every time a recomposition happens the presenter is recreated, how could I preserve the first created object? I have read that viewModel{} should work that way but I'm using KMM, so I cannot relay on android VM

[Ryan]

single {}

[sendoav]

But single would create a singleton object, I just want the object to persist recompositions, but gets recreated if I enter the same screen later

[sendoav]

I guess I could do something with the remember method of Compose

[Ryan]

guess it needs to be scoped accordingly. i don't use compose tho

[Marcello Galhardo]

If you need to create an object that will be “kept in memory” while that scope (a back stack entry) is in memory, you will need to use either ViewModel or a custom solution.

You could for example, put the Presenter inside a ViewModel.

[Marcello Galhardo]

If you want a simpler solution (sorry for the self-promotion), you can also use my library for that: https://github.com/marcellogalhardo/retained - it already handle this VM integration + gives you everything a VM would have without the need of inheritance, etc. I created it exactly for the use case you are describing. And it is very easy to combine with any lib, including Koin.

[Damian Zawadzki]

You also could use cokoin which also supports scopes
https://github.com/burnoo/cokoin

[sendoav]

Thanks for both responses, I'll check your
library Marcello and I would also consider using Cokoin