After Effects animation loaded with Lottie not playing

Question

I'm using the Lottie library for iOS and trying to load an animation in .json format downloaded LottieFiles.

I'm using this code in the viewDidLoad() method:

let animationView = LOTAnimationView(name: "infinite_rainbow")
animationView.loopAnimation = true
animationView.frame = CGRect(x: 0, y: 0, width: 400, height: 400)
animationView.center = self.view.center
animationView.contentMode = .scaleAspectFill
view.addSubview(animationView)
animationView.play()

Problem: just the first frame gets displayed, but the animation doesn't play. I have tried several files but the result is the same.

I'm using:

• Xcode 9.1

• Swift 4

• Lottie-ios v2.1.5 (cocoapod)

Answer 1

use content mode .scaleAspectFit instead of .scaleAspectFill

    let animationView = LOTAnimationView(name: "infinite_rainbow")
    animationView.loopAnimation = true
    animationView.frame = CGRect(x: 0, y: 0, width: 400, height: 400)
    animationView.center = self.view.center
    animationView.contentMode = .scaleAspectFit
    view.addSubview(animationView)
    animationView.play()

Answer 2

Try calling .play() in viewDidAppear