Lottie Adapter for SwiftUI macOS + iOS

AnimationList.swift

import Foundation

/// list animation with name from Resources
public enum AnimationList: String {
    /// stub for screens that are still in progress
    case inProgress = "in-develop-animation"
    /// animation for showing with some errors
    case errorAnimation = "error-animation"
    /// animation for showing with array
    case emptyAnimation = "empty-animation"
}

LottieHelper.swift

import Foundation
import Lottie

/// util class for work with Lottie
/// enum generated by SwiftFormat
public enum LottieHelper {
    /// func created lottie view for renders in SwiftUI Views by name
    static func makeLottieView(name: AnimationList) -> LottieAnimationView {
        let animationView = LottieAnimationView()
        let animation = LottieAnimation.named(name.rawValue)
        animationView.animation = animation
        animationView.loopMode = .loop
        animationView.play()
        animationView.contentMode = .scaleAspectFit

        return animationView
    }
}

LottieView.swift

import SwiftUI

struct LottieView: View {
    let name: AnimationList
    var body: some View {
        #if os(macOS)
        LottieViewMacOS(name: name)
        #else
        LottieViewIOS(name: name)
        #endif
    }
}

struct LottieView_Previews: PreviewProvider {
    static var previews: some View {
        LottieView(name: .inProgress)
    }
}

LottieViewIOS.swift

import SwiftUI

#if os(iOS)
struct LottieViewIOS: UIViewRepresentable {
    let name: AnimationList
    func makeUIView(context: Context) -> UIView {
        let view = UIView()

        let animationView = LottieHelper.makeLottieView(name: name)

        animationView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(animationView)

        NSLayoutConstraint.activate([
            animationView.heightAnchor.constraint(equalTo: view.heightAnchor),
            animationView.widthAnchor.constraint(equalTo: view.widthAnchor)
        ])

        return view
    }

    func updateUIView(_ uiView: UIView, context: Context) {}
}

struct LottieViewIOS_Previews: PreviewProvider {
    static var previews: some View {
        LottieViewIOS(name: .inProgress)
    }
}
#endif

LottieViewMacOS.swift

import SwiftUI

#if os(macOS)
struct LottieViewMacOS: NSViewRepresentable {
    let name: AnimationList

    func updateNSView(_ nsView: NSViewType, context: Context) {}

    func makeNSView(context: Context) -> some NSView {
        let view = NSView(frame: .zero)

        let animationView = LottieHelper.makeLottieView(name: name)

        animationView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(animationView)

        animationView.translatesAutoresizingMaskIntoConstraints = false
        animationView.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true
        animationView.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
        animationView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        animationView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true

        animationView.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
        animationView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)

        return view
    }
}

struct LottieViewMacOS_Previews: PreviewProvider {
    static var previews: some View {
        LottieViewMacOS(name: .inProgress)
    }
}
#endif