Hello, I’m setting up my LoginViewModel inside of ...

# multiplatform

[Brian Donovan]

Hello, I’m setting up my LoginViewModel inside of commonMain and trying to extend CoroutineViewModel which is inside of my appMain. Am I not supposed to do this?

[Grégory Lureau]

Are you trying to import a class from iosMain to commonMain ? (hint: that should be the opposite direction)
Where's defined your CoroutineViewModel class?

[Brian Donovan]

yes I was, I was following a repository tutorial, https://github.com/halcyonmobile/MultiplatformPlayground/blob/master/common/src/ap[…]cyonmobile/multiplatformplayground/shared/CoroutineViewModel.kt

[Brian Donovan]

I didn’t have a appleMain, so I put it inside of iOSmain. He has an appleMain.

[Brian Donovan]

I think this is wrong, he is extending CoroutineViewModel from commonMain?

[Grégory Lureau]

This repository use the expect/actual pattern, this is the "expect" shared class : https://github.com/halcyonmobile/MultiplatformPlayground/blob/master/common/src/co[…]cyonmobile/multiplatformplayground/shared/CoroutineViewModel.kt
The "actual" part is defined on each stack. You can use the common class everywhere, but inside a stack (I mean android/iOS/...) you can only refers class that are from commonMain our iosMain.

[Brian Donovan]

thanks

[Grégory Lureau]

Related documentation

[Brian Donovan]

what is this about

[Grégory Lureau]

When you define 1 expect in commonMain, you then have to define X actual for each of the platform you're using. (You should read the documentation and follow usage of the project you mentionned.)

[Brian Donovan]

Thanks