suixinkan_uikit/suixinkan/UI/Loading/LottieLoadingView.swift

//
//  LottieLoadingView.swift
//  suixinkan
//

import Lottie
import SnapKit
import UIKit

/// Lottie 循环 Loading 动画视图，使用 `Resources/Lottie/loading.json`。
final class LottieLoadingView: UIView {

    private let animationView: LottieAnimationView

    override init(frame: CGRect) {
        animationView = LottieLoadingView.makeAnimationView()
        super.init(frame: frame)
        addSubview(animationView)
        animationView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    /// 开始循环播放。
    func startAnimating() {
        animationView.loopMode = .loop
        animationView.play()
    }

    /// 停止播放。
    func stopAnimating() {
        animationView.stop()
    }

    private static func makeAnimationView() -> LottieAnimationView {
        if let url = loadingAnimationURL() {
            return LottieAnimationView(filePath: url.path)
        }
        return LottieAnimationView()
    }

    private static func loadingAnimationURL() -> URL? {
        Bundle.main.url(forResource: "loading", withExtension: "json", subdirectory: "Resources/Lottie")
            ?? Bundle.main.url(forResource: "loading", withExtension: "json")
    }
}