react native console.debug does not show log using log-ios

Question

After upgrading the existing project to react native v 0.48.3, console.debug is not listing logs when I run the application on the simulator. It used to work till I upgraded using the react-native upgrade option.

Any suggestion to view the logs using react-native log-ios. I am able to view logs on the Chrome console though, if I run the remote debugger.

React native version: 0.48.3
iOS = macOS Sierra 10.12.6.

react-native log-ios shows

Scanning 597 folders for symlinks in /Users/James/workspace/ReactNative/my_app/node_modules (4ms)
NOTE:  Most system logs have moved to a new logging system.  See log(1) for more information.
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.videosubscriptionsd[2757]) : Service exited with abnormal code: 1
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.imfoundation.IMRemoteURLConnectionAgent) : Unknown key for Boolean: EnableTransactions
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.imfoundation.IMRemoteURLConnectionAgent) : Unknown key for integer: _DirtyJetsamMemoryLimit
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.imfoundation.IMRemoteURLConnectionAgent) : Unknown key for Boolean: EnablePressuredExit
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.AssetCacheLocatorService) : Unknown key for Boolean: EnableTransactions
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.AssetCacheLocatorService) : Unknown key for Boolean: EnablePressuredExit
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.StreamingUnzipService) : Unknown key for Boolean: EnableTransactions
Sep 25 21:36:29 DSSB1234 com.apple.CoreSimulator.SimDevice.57E26096-292C-4C40-9A7A-D0E1092F482C[1625] (com.apple.StreamingUnzipService) : Unknown key for Boolean: EnablePressuredExit
Sep 25 21:36:33 DSSB1234 my_app[2763] : assertion failed: 16G29 15A372: libxpc.dylib + 69578 [D870A237-D3A7-31F5-AAD4-CE880C0C8E7B]: 0x7d
Sep 25 21:36:33 DSSB1234 Unknown[2763] : 

Answer 1

By default on iOS, it logs to the debug pane inside Xcode. From the iOS simulator, press (⌘+D) and press Remote JS Debugging. This will open a resource, http://localhost:8081/debugger-ui on localhost. From there, use the Chrome Developer tools JavaScript console to view console.log