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Xcode storyboard assistant editor stopped showing related files. "Automatic" is selected and "Class" is filled in Identity Inspector.
It was working before, but know it has stopped. "Auto" or "CounterPart" modes are still woking for other files except StoryBoard.
A few days ago, I tried to update from Xcode 5 to 6, but later on gave up. Would that have something to do with it?
965
Found the solution (at least worked for me), it's the same bug that causes you not to be able to create new outlets. You must delete the [DerivedData] folder:
【DerivedData】folder of you project. (This folder may inside your project's folder, or inside
~/Library/Developer/XCode/DerivedData/(your project)/ ) or somewhere
else that were setup by you.see here.
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With XCode 11 onwards, you can option(alt) + click on the file that you want to view in assistant editor.
Simple Fix.
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In same case this worked for me:
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Deleting the Derived Data didn't work for me nor force quitting Xcode and restarting it.
The only thing that worked was deleting both the class and the storyboard (only the reference to them) and adding them back to the project.
Hope to help someone.
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If anyone is wondering how to find Assistant editor in XCode 11 then please find the steps from the below image. You can show this options in storyboard or Xib files on upper left corner.
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Maybe it's too late but just with the keyboard, you can launch a reset for associated files. Use the keyboard : command + option + shift + z
You can find it in the menu Xcode->View->Assistant Editor->Reset Editor.
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Click first on the assistant window, then click on 'option'+'alt' and right click on the view controller that you want.
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I have Xcode 13.1 and none of these solutions is working for me, but this simple solution works for me every single time. With your Storyboard and (empty) Assistant Editor open, in the upper right of the Editor window click the "Add Editor on Right" icon Editor On Right Icon, and just as promised, it will open a new editor to the right of your Storyboard and (broken) Assistant Editor, only the Assistant in THIS window will be working! Just find the "Close Window" x on your broken editor, close it, and in its place will be your shiny new working Assistant!
Full Editor View of where to click to open the new Editor On Right
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This command on terminal fixed my issue:
defaults write com.apple.dt.XCode IDEIndexDisable 0
simply exiting and reopening Xcode worked for me.
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Tried all the above methods whereas after simply running the app Command + B fixed this issue and I was able to select the screen under automatic.
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For Xcode 8+ versions
Check at top process indicator that if Xcode is "indexing" files... if yes, then, please wait until it finishes. Once it get finished. Your file will automatically appear as counterpart in Automatic section.
If Xcode is not showing "indexing" in process bar, then perform as @Anna Chiara's Answer
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Finally, I figured out that the class name of File's Owner of .xib file is incorrect (the class doesn't exist). I corrected it and Assistant Editor works again.
Hope this helps you
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I had the same problem. Finally this is what worked for me.
Refactor tool
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The only thing that ended up working for me was copying over the code from the offending ViewController files and completely deleting them, then creating new ones with the exact same name and pasting in the previous code.
The assistant then linked up to the new ViewController files with no issue.
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None of these answers worked for me w/ XCode 13. However, the following worked:
Rename the ViewController class to ViewController2
Update the reference in the storyboard to ViewController2
This made the assistant editor appear.
Change the name of the class back to ViewController. Change the reference in main.storyboard back to ViewController and hit enter (Step 2)
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