Hi team,

First of all, thank you for your great work on this library — it’s been very helpful in my project.

I’ve encountered a memory leak in DotLottieAnimationView caused by a strong reference cycle between DotLottieAnimationView and its Coordinator.

Both DotLottieAnimationView and Coordinator hold strong references to each other:

public class DotLottieAnimationView: UIView, DotLottie {
    private var coordinator: Coordinator!

    private func setupMetalView() {
        self.coordinator = Coordinator(self, mtkView: mtkView)
    }
}

public class Coordinator: NSObject, MTKViewDelegate {
    private var parent: DotLottie

    init(_ parent: DotLottie, mtkView: MTKView) {
        self.parent = parent
    }
}

Because parent in Coordinator is a strong reference and DotLottieAnimationView holds coordinator strongly, neither object is ever deallocated.

This becomes a significant issue when DotLottieAnimationView is used in a scrolling UICollectionView or UITableView (e.g., a grid of animations). Over time, hundreds of DotLottieAnimationView instances accumulate in memory and are never released.

Best regards,
Abdulrahman Qasem