A prompt and convenient way of gererating thumbnails from an ALAsset
is described in the answer to question "Generating custom thumbnail from ALAssetRepresentation" — see a blog post of the author.
The only issue I have with this method is that it completely ignores all the filters or red-eye removal effects applied to an image (say one taken with stock iOS 7 Photo app + any filter in 'square' mode).
How should the code be adjusted to return 'filtered' thumbnails?
P.S. I know I can get filtered image through fullScreenImage
method of ALAssetRepresentation
, but it's way too slow and could cause 'Terminated due to Memory Pressure' error.