I fetch a lot of images from the web, and they are all kind of sizes - they can be big, small etc..
So I can resize them when I display them in the cell but this is
SDWebImage developer Olivier Poitrey answered this question for me here.
You have to implement the SDWebImageManagerDelegate protocol and then set it as the shared manager's delegate like this:
SDWebImageManager.sharedManager.delegate = self;
using the imageManager:transformDownloadedImage:withURL: instance method.
More information.
Worked perfectly for me.