Avoid App Store rejection when submitting 3rd party based app

A couple of days ago I submitted my first personal app to the Apple App Store. I know it can be surprising considering the few years I spent doing iOS development professionally. You may know this but I was more into Windows phone from its inception until Microsoft decided to murder it a few months ago. As a result, I fully switched to Apple, from the phone to the watch to the mac. Still kept my Windows laptop though.

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Set tint color on an image in a NSAttributedString

(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).

Introduction

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.

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