Xcode 7.1 Swift 2 Unknown class in Interface Builder file

Question

I've created new Cocoa Touch File. Named it SwipingViewController. enter image description here

Then try to add Custom Class to ViewController.

And when I run the app I receive an error

2015-10-09 10:53:25.054 ParseStarterProject[5369:389307] Unknown class SwipingViewController in Interface Builder file.

Unknown class SwipingViewController in Interface Builder file

Related: Xcode 6 Strange Bug: Unknown class in Interface Builder file

Here is my projects files

score 141 · Accepted Answer · edited Mar 11 '16 at 07:26

141

In storyboard below the Custom Class field the module is set to None. Change that to your app module or just remove and enter class again, it should set to default like this:

edited Mar 11 '16 at 07:26

bummi

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answered Oct 09 '15 at 09:17

Nakul

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thanks. That solves the problem. For some reasons I have not this - Current - Parse Project. I reload my Mac and maybe that also helps. – Alex Belke Oct 09 '15 at 09:41
Thanks, it helped when getting back to legacy project. – igraczech Mar 11 '16 at 12:42
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Still happening when setting up a new project in XCode 8.3.2 (module was set to None). But your suggestion works. – Brent Faust Apr 27 '17 at 02:55

score 16 · Answer 2 · answered Sep 20 '16 at 20:03

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For me the problem was that the class was not part of the Target Membership. Just add the class to the target, and you should see it back on the interface builder.

answered Sep 20 '16 at 20:03

Rodrigo Gonzalez

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I faced same issue in XCode 9.3 and i did exactly the same way it works , even by changing module inside xml file din't work , so this answer should work in latest xcode and old one too. Nice catch. – Shobhakar Tiwari May 24 '18 at 09:07

Yuchen · Answer 3 · 2017-02-15T14:29:14.603

Still seeing this problem with XCode 8.2.1, but I am able to fix the problem by modify these in the storyboard xml file:

Delete customModuleProvider="target" in the viewController tag:

- <viewController ... customModule="Flights" customModuleProvider="target" sceneMemberID="viewController">
+ <viewController ... customModule="Flights" sceneMemberID="viewController">

Delete customModule="Flights" customModuleProvider="target" in the widget tag (in my case, a label tag):

- <label ... translatesAutoresizingMaskIntoConstraints="NO" id="PzF-6K-Hpi" customClass="YZLabel" customModule="Flights" customModuleProvider="target">
+ <label ... translatesAutoresizingMaskIntoConstraints="NO" id="PzF-6K-Hpi" customClass="YZLabel">

I find that step 1 is very important too to resolve the crash/warning and cannot be skipped.

thank you you save my day I only need to add : customModule="ObjProject" customModuleProvider="target" — Niib Fouda, Oct 03 '16 at 09:00

score 3 · Answer 4 · answered May 22 '17 at 09:17

3

I resolved a similar issue by adding '-ObjC' to 'Other linker flags' in the 'Build Settings' of my project.

answered May 22 '17 at 09:17

sagnitude

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score 1 · Answer 5 · answered Jul 22 '17 at 17:47

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i had a similar issue as well. I had a ViewController with a TableView in it, and the tableView's custom class was called 'ViewController'. I just deleted the custom class for the tableView and the error went away.

answered Jul 22 '17 at 17:47

kev

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Thanks. I solved it using your method. I accidentally added "MyCustomViewController" to the custom class for both ViewController and TableView inside. – user3204765 Jul 27 '17 at 12:56

score 0 · Answer 6 · answered May 02 '16 at 05:10

0

I resolved this issue by applying view controller initialise. View-controller basic declaration of view did load method and class implementation in *.swift class shows in storyboard.

answered May 02 '16 at 05:10

RaviM

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score 0 · Answer 7 · answered Nov 06 '17 at 15:05

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I solved it by manually writing the module name in the storyboard, under the class name. In my case it was the same name as the class, but it may differ.

answered Nov 06 '17 at 15:05

Mijail

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score 0 · Answer 8 · answered Jul 06 '18 at 11:26

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For me: for table view cell in 'Indentity Inspector' unchecked 'Inherit Module From Target' and cleaned the project. It solved the problem and project run successfully

answered Jul 06 '18 at 11:26

Kiryl Ivanou

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Xcode 7.1 Swift 2 Unknown class in Interface Builder file

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