CGImage from NSURL works but not from UIImage

Question

I have some issues applying filters to an image. The following code works perfect when using CIImage:imageWithContentsOfURL:

NSInteger filterIndex = [(UITapGestu         


        

Answer 1

Juraj Antas' answer in this question How to Convert UIImage to CIImage and vice versa fixed my issue:

UIImage *u = [UIImage imageNamed:@"image.jpg"];
CIImage *image = [[CIImage alloc] initWithCGImage: u.CGImage];