It is not possible to log a caught exception in iOS using Crashlytics SDK. CLS_LOG can be used to log custom messages, but these log messages will go to Crashlytics only with the next crash data. If there is no crash, these log messages will never land in the Crashlytics dashboard. I got an official confirmation from the Crashlytics support team regarding the same. Logging caught exceptions in iOS is there in their roadmap.
