Problems after upgrading to Xcode 10: Build input file cannot be found

Question

I upgraded my Xcode SDK to version 10 last night and then find I cannot build.

I\'m getting this error:

Build input file cannot be found: \

Answer 1

Not that I did anything wrong, but I ran into this issue for a completely different reason and kinda know what caused this.

I previously used finder and dragged a file into my project's directory/folder. I didn't drag into Xcode. To make Xcode include that file into the project, I had to drag it into Xcode myself later again.

But when I switched to a new branch which didn't have that file (nor it needed to), Xcode was giving me this error:

Build input file cannot be found: '/Users/honey/Documents/xp/xpios/powerup/Models Extensions/CGSize+Extension.swift'

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I did clean build folder and delete my derived data, but it didn't work until I restarted my Xcode.