GestureRecognizer not responding to tap

I discovered the answer after carefully combing through my code.

One of the parent views was created without supplying a frame:

While it's a noobish enough error to warrant deletion of this questions, odds are someone else will also have the same issue in the future...

I was using UITapGestureRecognizer that I placed on a UILabel using Storyboard.

To get this to work I also had to place a checkmark in the block labeled: "User Interaction Enabled" in the UILabel Attributes Inspector in the Storyboard.