问题
I am getting following error all the time in my iOS app:
objc[56232]: Class VCWeakObjectHolder is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AVConference.framework/Frameworks/ViceroyTrace.framework/ViceroyTrace (0x12fe564d0) and /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AVConference.framework/AVConference (0x12ef82e38). One of the two will be used. Which one is undefined.
The app itself runs fine but the debugger will not attach to the device process. The simulator does attach but the app crashes immediately after a breakpoint is hit.
I am running out of ideas on how to deal with it. Any help would be greatly appreciated.
回答1:
Simulator -> Hardware -> Erase all content and Settings...Works for me.
回答2:
I submitted bug #43377301 to https://bugreport.apple.com/
Debug messages should be off in Apple frameworks (Class VCWeakObjectHolder)
I'm currently fixing bugs in an old code base and I have no idea what this internal Apple "warning" means.
It shouldn't be displayed to the 3rd party developer. I'm using CoreBluetooth and Objective-C.
来源：https://stackoverflow.com/questions/49994063/error-class-vcweakobjectholder-is-implemented-in-both-is-crashing-debug-ses