Is there any way to find which UI element an IBOutlet declared in code is connected to?
Go to your view controller file where you have declared IBOutlet
(.h or .m). Then you can see left side of each variable declaration there is a dark grey round image. (It is filled if you have connected that IBOutlet with Storyboard/Xib unless it is unfilled.)
By clicking that image you can see small popover which shows connection of outlet. See below image will show you.