let animationView = LOTAnimationView(name: "LottieLogo")
self.view.addSubview(animationView)
animationView.play{ (finished) in
  // Do Something
}

let animationView = LOTAnimationView(name: "LottieLogo" bundle:yourBundle)
self.view.addSubview(animationView)
animationView.play()

let animationView = LOTAnimationView(contentsOf: WebURL)
self.view.addSubview(animationView)
animationView.play()

let translation = gesture.getTranslationInView(self.view)
let progress = translation.y / self.view.bounds.size.height;
animationView.animationProgress = progress

animationView.play(fromProgress: 0.25, toProgress: 0.5, withCompletion: nil)

import UIKit
import Lottie

class ViewController: UIViewController {
  
  var animationView: LOTAnimationView = LOTAnimationView(name: "SpinnerSpin");
  
  override func viewDidLoad() {
    super.viewDidLoad()
    
    // Setup our animaiton view
    animationView.contentMode = .scaleAspectFill
    animationView.frame = CGRect(x: 20, y: 20, width: 200, height: 200)

    self.view.addSubview(animationView)
    // Lets change some of the properties of the animation
    // We arent going to use the MaskLayer, so lets just hide it
    animationView.setValue(0, forKeypath: "MaskLayer.Ellipse 1.Transform.Opacity", atFrame: 0)
    // All of the strokes and fills are white, lets make them DarkGrey
    animationView.setValue(UIColor.darkGray, forKeypath: "OuterRing.Stroke.Color", atFrame: 0)
    animationView.setValue(UIColor.darkGray, forKeypath: "InnerRing.Stroke.Color", atFrame: 0)
    animationView.setValue(UIColor.darkGray, forKeypath: "InnerRing.Fill.Color", atFrame: 0)
    
    // Lets turn looping on, since we want it to repeat while the image is 'Downloading'
    animationView.loopAnimation = true
    // Now play from 0 to 0.5 progress and loop indefinitely.
    animationView.play(fromProgress: 0, toProgress: 0.5, withCompletion: nil)
    
    // Lets simulate a download that finishes in 4 seconds.
    let dispatchTime = DispatchTime.now() + 4.0
    DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
      self.simulateImageDownloaded()
    }
  }
  
  func simulateImageDownloaded() {
    // Our downloaded image
    let image = UIImage(named: "avatar.jpg")
    let imageView = UIImageView(image: image)

    // We want the image to show up centered in the animation view at 150Px150P
    // Convert that rect to the animations coordinate space
    // The origin is set to -75, -75 because the origin is centered in the animation view
    let imageRect = animationView.convert(CGRect(x: -75, y: -75, width: 150, height: 150), toLayerNamed: nil)
    
    // Setup our image view with the rect and add rounded corners
    imageView.frame = imageRect
    imageView.layer.masksToBounds = true
    imageView.layer.cornerRadius = imageRect.width / 2;
    
    // Now we set the completion block on the currently running animation
    animationView.completionBlock = { (result: Bool) in ()
      // Add the image view to the layer named "TransformLayer"
      self.animationView.addSubview(imageView, toLayerNamed: "TransformLayer", applyTransform: true)
      // Now play the last half of the animation
      self.animationView.play(fromProgress: 0.5, toProgress: 1, withCompletion: { (complete: Bool) in
        // Now the animation has finished and our image is displayed on screen
        print("Image Downloaded and Displayed")
      })
    }
    
    // Turn looping off. Once the current loop finishes the animation will stop 
    // and the completion block will be called.
    animationView.loopAnimation = false
  }
  
}

let animationView = LOTAnimationView(name: "toggle");
self.view.addSubview(animationView)
animationView.frame.origin.x = 40
animationView.frame.origin.y = 20
animationView.autoReverseAnimation = true
animationView.loopAnimation = true
animationView.play()

let animationView2 = LOTAnimationView(name: "toggle");
self.view.addSubview(animationView2)
animationView2.frame.origin.x = 40
animationView2.frame.origin.y = animationView.frame.maxY + 4
animationView2.autoReverseAnimation = true
animationView2.loopAnimation = true
animationView2.play()

let animationView3 = LOTAnimationView(name: "toggle");
self.view.addSubview(animationView3)
animationView3.frame.origin.x = 40
animationView3.frame.origin.y = animationView2.frame.maxY + 4
animationView3.autoReverseAnimation = true
animationView3.loopAnimation = true
animationView3.play()

let animationView4 = LOTAnimationView(name: "toggle");
self.view.addSubview(animationView4)
animationView4.frame.origin.x = 40
animationView4.frame.origin.y = animationView3.frame.maxY + 4
animationView4.autoReverseAnimation = true
animationView4.loopAnimation = true
animationView4.play()

animationView2.setValue(UIColor.green, forKeypath: "BG-On.Group 1.Fill 1.Color", atFrame: 0)
animationView3.setValue(UIColor.red, forKeypath: "BG-On.Group 1.Fill 1.Color", atFrame: 0)
animationView4.setValue(UIColor.orange, forKeypath: "BG-On.Group 1.Fill 1.Color", atFrame: 0)

animationView2.setValue(UIColor.green, forKeypath: "BG-On.Group 1.Fill 1.Color", atFrame: 0)
animationView2.setValue(UIColor.red, forKeypath: "BG-Off.Group 1.Fill 1.Color", atFrame: 0)