Hide strange unwanted Xcode logs

Question

When using the Xcode 8+ and creating a new blank project, the following logs appear when running the application:

2016-06-13 16:33:34.406093 TestiOS10[8209:100611] bundleid: com.appc.TestiOS10, enable_level: 0, persist_level: 0, propagate_with_activity: 0
2016-06-13 16:33:34.406323 TestiOS10[8209:100607] Created DB, header sequence number = 248
2016-06-13 16:33:34.409564 TestiOS10[8209:100611] subsystem: com.apple.UIKit, category: HIDEvents, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 0, privacy_setting: 0
2016-06-13 16:33:34.504117 TestiOS10[8209:100607] Created DB, header sequence number = 248
2016-06-13 16:33:34.548023 TestiOS10[8209:100607] subsystem: com.apple.BaseBoard, category: MachPort, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 0, privacy_setting: 0
2016-06-13 16:33:34.568458 TestiOS10[8209:100608] subsystem: com.apple.FrontBoard, category: Common, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 0, privacy_setting: 0

Maybe someone already found a configuration for this to handle?

Answer 1

This is still not fixed in Xcode Version 8.0 beta 2 (8S162m) for me and extra logs are also appearing in the Xcode console

** EDIT 8/1/16: This has been acknowledged in the release notes for Xcode 8 Beta 4 (8S188o) as an issues still persisting.

Known Issues in Xcode 8 beta 4 – IDE

Debugging

• Xcode Debug Console shows extra logging from system frameworks when debugging applications in the Simulator. (27331147, 26652255)

Presumably this will be resolved by the GM release. Until then patience and although not ideal but a workaround I'm using is below...

Similar to the previous answer I am having to:

• prefix my print logs with some kind of special character (eg * or ^ or ! etc etc)

• Then use the search box on the bottom right of the console pane to filter my console logs by inputing my chosen special character to get the console to display my print logs as intended

Answer 2

This solution has been working for me:

1. Run the app in the simulator
2. Open the system log (⌘ + /)

This will dump out all of the debug data and also your NSLogs.

To filter just your NSLog statements:

1. Prefix each with a symbol, for example: NSLog(@"^ Test Log")
2. Filter the results using the search box on the top right, "^" in the case above

This is what you should get:

Answer 3

Alright. There seems to be a lot of commotion about this one, so I'll give y'all a way to persist it without using that scheme trick. I'll address the iOS Simulator specifically, but this also might need to be applied for the TV Sim as well which is located in a different dir.

The problem that is causing all of this stuff are plists located within the Xcode directory. There is a process that gets launched called configd_sim when the Sim starts that reads the plists in and prints debugging information if the plists specify they should be logged.

The plists are located here:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/Preferences/Logging/Subsystems

If you are playing around with a beta, take note that the dir will be different.

You will see numerous plists in this directory. Now, build and run your application and observe the logs. You are looking for the content immediately followed by the subsystem: part. It is the name immediately following this that represents the corresponding problematic plist.

From there, either modify the plist to knock out the debugging [Level] key/value which is a dictionary containing the "Enable" => "Default" key/value... or just simply delete the plist. Note, that you will need to be root to do either of these since they're located in the Xcode application.

the plutil -p command might be of use to you as well. i.e.

plutil -p /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/System/Library/Preferences/Logging/Subsystems/com.apple.BackBoardServices.fence.plist

This gave me one of the problematic plists which contained:

{ "DEFAULT-OPTIONS" => { "Level" => { "Enable" => "Default" }}}

Good luck :]

Answer 4

My solution is to use the debugger command and/or Log Message in breakpoints.

And change the output of console from All Output to Debugger Output like

Answer 5

A tweet had the answer for me - https://twitter.com/rustyshelf/status/775505191160328194

To stop the Xcode 8 iOS Simulator from logging like crazy, set an environment variable OS_ACTIVITY_MODE = disable in your debug scheme.

It worked.

Answer 6

This is related to a known issue with logging found in the Xcode 8 Beta Release Notes (also asked an engineer at WWDC).

When debugging WatchOS applications in the Watch simulator, the OS may produce an excessive amount of unhelpful logging. (26652255)

There is currently no workaround available, you must wait for a new version of Xcode.

EDIT 7/5/16: This is supposedly fixed as of Xcode 8 Beta 2:

Resolved in Xcode 8 beta 2 – IDE

Debugging

• When debugging an app on the Simulator, logs are visible. (26457535)

Xcode 8 Beta 2 Release Notes