One of the specifications of my app is that on tapping a tableView cell, the user will be redirected to the website associated with the cell. Here is the code:
I was getting a similar debug warning when trying to present a QLPreviewController modally. I've read on other posts that it's an Xcode bug.
For me the error displayed when I ran my app on the simulator but not on an actual device. Must be an Xcode/Simulator issue. Hope that helps.