In my application, I have created a CALayer (with a few sublayers - the CALayer is composed of shapes added as sublayers).
I am trying to create a UIImage that I will be able to upload to a server (I have the code for this).
However, I can't figure out how to add the CALayer to a UIImage.
Is this possible?
Sounds like you want to render your layer into a UIImage. In that case, the method below should do the trick. Just add this to your view or controller class, or create a category on CALayer.
Obj-C
- (UIImage *)imageFromLayer:(CALayer *)layer
{
UIGraphicsBeginImageContextWithOptions(layer.frame.size, NO, 0);
[layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *outputImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return outputImage;
}
Swift
func imageFromLayer(layer:CALayer) -> UIImage {
UIGraphicsBeginImageContextWithOptions(layer.frame.size, layer.isOpaque, 0)
layer.render(in: UIGraphicsGetCurrentContext()!)
let outputImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return outputImage!
}