Warning: Presenting view controllers on detached view controllers is discouraged
My situation with this is different than every other example I have been able to find on here. I have a tab based app. On one of the tabs a user is able to press a button that downloads several files from a web server all at once. I make use of NSOperation to perform each of these downloads so that I can utilize the built in dependencies. The downloads are all occurring on a background thread so the app remains responsive. When the final download is complete I put an alertController on screen letting the user know that they are complete. If the user has selected a different tab when the alert