Can't drag and drop item from storyboard to viewcontroller in xcode

Question

I started working with xcode a few days ago, and today I tried to connect a textview from the main storyboard to the viewcontroller, but I figured out that its not working.

Answer 1

I had to both rename the class (from ViewController to ViewController2) of the ViewController.swift file and change the Custom Class (from ViewController to ViewController2) of the Main Storyboard's View Controller to make Ctrl-Drag-and-drop work again.

Renaming back to ViewController from ViewController 2 in ViewController.swift and Main Storyboard did not thwart the Ctrl-Drag-and-drop, it remained working afterward as well.