Is lottie using a private API, _overrideSizeThatFits?

[josh-arnold-1]

Which Version of Lottie are you using?

Lottie 4.5.0

Question

I saw lottie is using _overrideSizeThatFits for the SwiftUI view, as the sizeThatFits is only available for iOS 16+.
(link to lottie code)

• Is this considered a private API by Apple?
• Has anyone ran into any issues using this?
• Would Apple allow this usage when submitting to the app store?
• Could this code break on older iOS versions?

Thanks!

[calda]

We've been using this for some time and haven't heard reports of any issues.

[josh-arnold-1]

Thanks for the response! So I assume apps have been approved by app store review using this?

[calda]

Yes, hundreds (maybe thousands) of apps use Lottie in the App Store, including Airbnb.