如何删除程序中不再存在的东西，我从视图 Controller 拖到 function？

Question

I have dragged an element onto my code. How do I undo that? Here's an image:

The Green Slider is no longer on my storyboard and yet it appears in the round tab!

Here again:

Is there a way to get rid of "Main.storyboard – Green Slider"?

Answer 1

Click on the pop up.. it will take you to storyboard.. remove its reference from there if it exist.. attached giff for your help

If reference doesn't exist then do 4 steps

1. Close your project and close Xcode
2. Open /Users/XXXXX/Library/Developer/Xcode/DerivedData and delete your cache of project
3. Open /Users/ХХХХХ/Library/Developer/Xcode/DerivedData/ModuleCache.noindex and delete all cache from this directory
4. Open your project again and click Product > Build

If still Exist Do

Just Change one letter from name it cause to break relationship to storyboard and link it again to new storyboard

I hope these steps will help you

Answer 2

You could do a clean build by running command+shift+k

Another example would be to go in front of the IBOutlet and and move it to the previous line or the next line.