OSLogStoreTest
Test app for evaluating if apps can access their own OSLog logs via OSLogStore in iOS 14 and/or macOS 11.0.
iOS 14
I can’t get it to work on an iOS device running iOS 14.0 beta 1–6. I can instantiate an OSLogStore and OSLogEnumerator, but the enumerator doesn’t provide any log entries (unless I’m holding it wrong), and I’m seeing this error message in the Xcode console:
On iOS 14.0 beta 7 the sample crashes with:
+[OSLogStore storeWithScope:error:]: unrecognized selector sent to class 0x1fceb5728
Given Xcode 12 beta 7 isn't released yet, I dumped the OSLogStore classs and it would seem the method was removed without an obvious replacement to call.
Error Error Domain=NSCocoaErrorDomain Code=4099
"The connection to service on pid 0 named com.apple.OSLogService
was invalidated." UserInfo={NSDebugDescription=The connection to
service on pid 0 named com.apple.OSLogService was invalidated.}
When running in the iOS simulator, the error message is different:
Error Domain=OSLogErrorDomain Code=9
"Client lacks entitlement to perform operation"
UserInfo={NSLocalizedDescription=Client lacks entitlement
to perform operation, _OSLogErrorInternalCode=14}
Apple engineers have confirmed this is a bug. I hope it will get fixed before the final iOS 14 release.
macOS 11.0 Big Sur
The code works as expected in the macOS target.
More about OSLog in iOS 14 and macOS 11
See Peter Steinberger's article: Logging in Swift (08/2020)