问题
Is there any way to find which UI element an IBOutlet declared in code is connected to?
回答1:
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.
来源：https://stackoverflow.com/questions/27056812/how-to-find-the-ui-element-connected-to-a-specific-iboutlet