(2018-08-23 EDIT) Updated the post and re-created the code from almost scratch using XCode 10.0 beta 6 and iOS 12. Code written using Swift 4. (/EDIT).
Hi everyone, I have been working, for a few days now, on a project that requires to make an app fully customisable from a configuration file. I was coding and coding and coding, extracting color definitions, applying tints on images, when I ran into an issue. I could not apply tint over a mutable attributed string, nor simple attributed string for that matter. So I was there, looking at my NSAttributedString and my NSTextAttachment without any property allowing me to change only the image color.