iOS 12.2 Symbol not found: _OBJC_CLASS_$__TtCs12_SwiftObject

I have the same problem when I build to an iPhone (I've tried with an app that I develop, as well as a couple of apple demo apps: BreakfastFinder and MarsHabitatPricePredictor). There's no problem when I build to an iPhone simulator.

dyld: Symbol not found: _OBJC_CLASS_$__TtCs12_SwiftObject

xCode 10.2 beta 3 (10P99q)

macOS 10.14 (18A391)

iOS 12.2 beta 2 (16E5191d)

I just updated my iPhone from 12.2 beta 2 to beta 3. This resolved the crash.

Thanks, that resolved the crash for me, too!

Updating the iPad to iOS 12.2 Beta 3 (16E5201e) does resolve the problem.

Hi all,

I'm having a similar issue in my development process. I'm trying really hard to run an app that has loaded and run correctly previously. I haven't changed anything but let it sit for a few weeks, likely allowing software updates to get involved.

I'm running macOS 10.14.3 and iOS 12.2 on my iPhone 8 Plus. It doesn't matter if I run on either the newest XCode beta or the latest release.

When I attempt to run on XCode 10.1, the app doesn't run and I get an alert before anything can get going:

"Could not locate device support files.

This iPhone 8 Plus (Model A1864, A1897, A1898, A1899) is running iOS 12.2 (16E5181f), which may not be supported by this version of Xcode."

When I attempt to run on XCode 10.1 Beta 3, the software runs but display nothing on the iPhone before displaying:

"dyld: Symbol not found: _OBJC_CLASS_$__TtCs12_SwiftObject

Referenced from: /var/containers/Bundle/Application/62734D4B-ADA2-4DA1-B510-D54F24119F93/VirtualOrgan.app/VirtualOrgan

Expected in: /usr/lib/swift/libswiftCore.dylib

in /var/containers/Bundle/Application/62734D4B-ADA2-4DA1-B510-D54F24119F93/VirtualOrgan.app/VirtualOrgan

(lldb)"

Any help would be very much appreciated!

P.S. I previously had both my Mac and iPhone on the beta software program but when it initally started causing problems, I reverted both to the latest releases. I don't imagine that'd cause an issue but it seemed relevant enough given our talks of beta softwares.

thank you so much!

dyld: Symbol not found: _OBJC_CLASS_$__TtCs12_SwiftObject

resolved.

As much as I would love to accept this, it's not really a solution.