Xcode create image from calayer

func imageFromLayer(layer:CALayer) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(layer.frame.size, layer.isOpaque, 0)
    layer.render(in: UIGraphicsGetCurrentContext()!)
    let outputImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return outputImage!
}

Source: stackoverflow.com

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