How to get the list of filter names in CIFilter class?

Question

I am using the following code for exposure adjustment and its working. I need the filter names for sharpen, denoise, highlighs, color temperature, shadows, blur, etc.

Answer 1

iOS 14, Swift 5

Must confess not easy to read, but an answer that is comparable to the first one on Objective C.

for filtername in filters {
  print("filter \(filtername)")
  print("attributes \(CIFilter.init(name: filtername)?.attributes.keys.description)")
}

Produces this ...

filter CIAccordionFoldTransition
attributes Optional("[\"inputImage\", \"CIAttributeFilterDisplayName\",     \"inputTargetImage\", \"CIAttributeFilterAvailable_iOS\", \"CIAttributeFilterAvailable_Mac\", \"inputNumberOfFolds\", \"inputFoldShadowAmount\", \"inputBottomHeight\", \"CIAttributeReferenceDocumentation\", \"inputTime\", \"CIAttributeFilterCategories\", \"CIAttributeFilterName\"]")
filter CIAdditionCompositing
attributes Optional("[\"CIAttributeFilterCategories\", \"CIAttributeFilterName\", \"CIAttributeFilterDisplayName\", \"inputImage\", \"CIAttributeReferenceDocumentation\", \"CIAttributeFilterAvailable_iOS\", \"CIAttributeFilterAvailable_Mac\", \"inputBackgroundImage\"]")

So the info is there in these long strings, you just need to pick it out :)