how to properly apply Core Image filter

Programming in objective-c: how to properly apply Core Image filter on newest questions tagged objective-c – Stack Overflow

Im having a trouble with Core image. what I’m doing is getting an image from a UIImageView and then use some code i found in tutorials (I’m new to core Image) but then I want to put the sepia image back into the same same UIImageView when ever I try to put the new image into the view it just disappears I have tested to see if the image view contains an image and it does but it is not visible. any suggestions on what to do?

source: http://stackoverflow.com/questions/11148636/how-to-properly-apply-core-image-filter
Programming in objective-c: programming-in-objective-c