And would a Stop the world pause break the swift U...

# multiplatform

[Lucas Schiavini]

And would a Stop the world pause break the swift UI necessarily?

[ribesg]

I have a pretty big iOS app written entirely in Kotlin. The switch to the new memory model didn’t seem to change anything, but it’s still recent. Didn’t notice any new lag/freezing. I just had the compilation time tripled and I don’t have to care about freezing stuff anymore.

[ribesg]

I’m not using Swift UI (you can’t in Kotlin afaik) but didn’t notice anything different in my usage of UIKit

[Lucas Schiavini]

Whoa whoa whoa, I use all my apps with swift ui and it works with kotlin multiplatform seamlessly

[Lucas Schiavini]

@ribesg But that is my point exactly, with their new garbage collector, pauses should be less frequent, but longer. I want to be able to avoid pauses without sacrificing developer experience

[ribesg]

I kinda hope you didn’t misunderstand me and there actually is a way to use Swift UI in Kotlin but I think you misunderstood. I’m using UIKit in Kotlin. I don’t have any Swift or XML code for the UI, only Kotlin

[ribesg]

Last time I checked you couldn’t use any pure Swift lib in Kotlin, and Swift UI is pure Swift

[Lucas Schiavini]

Ohhhhhhhh That is cool, I didn't know you could do that lol

[ribesg]

It’s insanely cool, switching language all the time breaks my brain so it actually saves me a lot of time. Plus with some neat extension functions the UI code can be pretty tidy (especially on the constraints part). And not having to use XCode is a huge plus too

[ribesg]

My only use of XCode currently is launching simulators and reading log, and rarely using the UI debugger thingy

[ribesg]

Here’s a Kotlin view for example:

class EventListUIView(frame: CValue<CGRect>, header: UIView) : UIView(frame), UITextFieldDelegateProtocol {

    val collectionViewWrapper = EventListUICollectionViewWrapper()

    val loader = uiActivityIndicatorView(UIColor.wizParma) {
        large()
    }

    init {
        backgroundColor = UIColor.backgroundGray

        addSubview(collectionViewWrapper.view)
        addSubview(loader)
        addSubview(header)

        setupConstraints {
            with(header) {
                topToTopOf(parent, useSafeArea = true)
                fitHorizontallyTo(parent)
            }

            with(collectionViewWrapper.view) {
                topToTopOf(parent, useSafeArea = true)
                bottomToBottomOf(parent)
                fitHorizontallyTo(parent)
            }

            with(loader) {
                centerIn(parent)
            }
        }
    }

}