I'm trying to created an IBDesignable custom view. However, after adding the class to an item in xib, it always failed to build, without any error or warning.
I imported the class to another newly created project, and it works fine.
Is there anyone know if there is some mistake I made to prevent IBDesignable works on the project?
I'm currently using xcode 8.2.1, sdk 10.2.
I have the same problem too... 😟
Do you have a watchOS app in your workspace? It seems Xcode 9.3 won't let me use IBDesignable either if I have watchOS stuff present, even though the stuff I'm trying to make IBDesignable have nothing to do with that watch target. If my workspace uses the "old" build system, then I at least see an error in the Report Navigator, but if I use the "new" build system it just fails silently.
