xcode créer une image à partir de Calayer
func imageFromLayer(layer:CALayer) -> UIImage {
UIGraphicsBeginImageContextWithOptions(layer.frame.size, layer.isOpaque, 0)
layer.render(in: UIGraphicsGetCurrentContext()!)
let outputImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return outputImage!
}
TheKrisinator