Project crashes after updating Xcode.

My project can normally work until I update the Xcode to Version 11.0 (11A420a).
Now,When it runs in a little while,it crashes.The error message is as follows:

dyld: Symbol not found: _OBJC_CLASS_$__TtCs12_SwiftObject

Referenced from: /Users/qizijia/Library/Developer/CoreSimulator/Devices/8B40226A-A7D4-4915-9982-9C8CEF77F24B/data/Containers/Bundle/Application/4B75826C-5FEE-4EB3-85EE-23477B0ED2BD/IRIS iOS.app/Frameworks/SCLAlertView.framework/SCLAlertView

Expected in: /Library/Developer/Toolchains/swift-5.0.1-RELEASE.xctoolchain/usr/lib/swift/iphonesimulator/libswiftCore.dylib

in /Users/qizijia/Library/Developer/CoreSimulator/Devices/8B40226A-A7D4-4915-9982-9C8CEF77F24B/data/Containers/Bundle/Application/4B75826C-5FEE-4EB3-85EE-23477B0ED2BD/IRIS iOS.app/Frameworks/SCLAlertView.framework/SCLAlertView


What can I do to address the problem?

Thanks in advance.

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Try an option- clean build folder.


Restart the Mac after upgrading Xcode.


Maybe you could also upgrade to XCode 11.1.

Posted by
Claude31
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