Two view controllers have the same storyboard identifier

Question

As the title suggests I am getting the error that two view controllers have the same identifier but the problem is, they don't! I have checked through all my storyboards multiple times and never saw any with the identifier! The full error is

Two view controllers have the same storyboard identifier "IAC".

Not only that, but there are no storyboards with the identifier "IAC". Its possible I may have named one that a long time ago but their certainly aren't any now. I also just updated Xcode to the ios 7.1 SDK and it's possible that's part of the error. Does anyone know why?

Answer 1

remove derive data from Xcode -> Prefrences -> Locations -> DerivedData and rerun the project

Answer 2

In that case, press Command + Shift + F and then type the identifier that is being mentioned in the Warning / Error area.

Here after you search there will be list of matches, in that select Storyboard icons, and your answer lies there.

Answer 3

Have you already tried cleaning your project temp and caches files and restarting Xcode? Sometimes this simple step can solve problems like this.

Answer 4

I got same error in my application. I could not find any information regarding this in web. I have cleaned and deleted derived data nothing could not help me.

After some time I found solution for this.

I have assigned one story board identifier to two view controllers in scene(where we can see entire views at one place) in my application. After some time I realised this error and solved it.

goto->storyboard scene->click on view controllers and observe the identity inspector in the control panel.

if you assigned the same story board identifier to 2 or more view controllers then remove it. Delete viewController name which is assigned for 2 or more view controllers in the Identity inspector. I hope I am able to make everyone understand.

Answer 5

In that case, press Command + Shift + F and then search by type the identifier that (exam problem search by name "IAC") you will see duplicate data after you see that you choose delete and build again.