UIImageView.startAnimating¶

var images: [UIImage] = []
for i in 0..<8 {
    let name = String(format: "loading-%d", i)
    images.append(UIImage(named: name)!)
}

imageView.animationImages = images
imageView.animationDuration = 0.8
imageView.animationRepeatCount = 0

imageView.startAnimating()