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

User · Answer

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    gt   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    gt     Level    gt     Enable    gt   Default       Good luck

User · Answer

Please note that for iOS 14 Simulator  the OS ACTIVITY MODE disable will not show any logs using the new Swift Logger  You will have to remove or enable it

User · Answer

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

User · Answer

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

User · Answer

Try this   1- From Xcode menu open  Product   Scheme   Edit Scheme   2- On your Environment Variables set OS ACTIVITY MODE   disable

User · Answer

Please find the below steps    Select Product    Scheme    Edit Scheme or use shortcut   CMD    lt  Select the Run option from left side  On Environment Variables section  add the variable OS ACTIVITY MODE   disable   For more information please find the below GIF representation

User · Answer

Building on the original tweet from  rustyshelf  and illustrated answer from iDevzilla  here s a solution that silences the noise from the simulator without disabling NSLog output from the device    Under Product   Scheme   Edit Scheme      Run  Debug   set the OS ACTIVITY MODE environment variable to   DEBUG ACTIVITY MODE  so it looks like this       Go to your project build settings  and click   to add a User-Defined Setting named DEBUG ACTIVITY MODE  Expand this setting and Click the   next to Debug to add a platform-specific value  Select the dropdown and change it to  Any iOS Simulator   Then set its value to  disable  so it looks like this

User · Answer

In Xcode 10 the OS ACTIVITY MODE variable with disable  or default  value also turns off the NSLog no matter what    So if you want to get rid of the console noise but not of your own logs  you could try the good old printf     instead of the NSLog since it is not affected by the OS ACTIVITY MODE   disable   But better check out the new os log API here

User · Answer

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

User · Answer

This is no longer an issue in xcode 8 1  tested Version 8 1 beta  8T46g    You can remove the OS ACTIVITY MODE environment variable from your scheme   https   developer apple com go  id xcode-8 1-beta-rn      Debugging          Xcode Debug Console no longer shows extra logging from system   frameworks when debugging applications in the Simulator   26652255    27331147

User · Answer

This solution has been working for me    Run the app in the simulator Open the system log           This will dump out all of the debug data and also your NSLogs    To filter just your NSLog statements    Prefix each with a symbol  for example  NSLog     Test Log   Filter the results using the search box on the top right      in the case above   This is what you should get

User · Answer

OS ACTIVITY MODE didn t work for me  it may have been because I typo d disable as disabled  but isn t that more natural      or at least didn t prevent a great deal of messages  So here s the real deal with the environment variables   https   llvm org svn llvm-project lldb trunk source Plugins Platform MacOSX PlatformDarwin cpp  lldb private  Error PlatformDarwin  LaunchProcess lldb private  ProcessLaunchInfo  amp launch info         Starting in Fall 2016 OSes  NSLog messages only get mirrored to stderr      if the OS ACTIVITY DT MODE environment variable is set    It doesn t      require any specific value  rather  it just needs to exist        We will set it here as long as the IDE DISABLED OS ACTIVITY DT MODE flag      is not set   Xcode makes use of IDE DISABLED OS ACTIVITY DT MODE to tell      LLDB  not  to muck with the OS ACTIVITY DT MODE flag when they      specifically want it unset    const char  disable env var    IDE DISABLED OS ACTIVITY DT MODE     auto  amp env vars   launch info GetEnvironmentEntries      if   env vars ContainsEnvironmentVariable disable env var            We want to make sure that OS ACTIVITY DT MODE is set so that        we get os log and NSLog messages mirrored to the target process        stderr      if   env vars ContainsEnvironmentVariable  OS ACTIVITY DT MODE          env vars AppendArgument llvm  StringRef  OS ACTIVITY DT MODE enable               Let our parent class do the real launching    return PlatformPOSIX  LaunchProcess launch info       So setting OS ACTIVITY DT MODE to  NO  in the environment variables  GUI method explained in Schemes screenshot in main answer  makes it work for me   As far as NSLog being the dumping ground for system messages  errors  and your own debugging  a real logging approach is probably called for anyway  e g  https   github com fpillet NSLogger    OR  Drink the new Kool-Aid  http   asciiwwdc com 2016 sessions 721 https   developer apple com videos play wwdc2016 721  It s not surprising that there are some hitches after overhauling the entire logging API   ADDENDUM  Anyway  NSLog is just a shim   https   developer apple com library content releasenotes Miscellaneous RN-Foundation-OSX10 12      NSLog   CFLog      NSLog is now just a shim to os log in most circumstances    Only makes sense now to quote the source for the other env variable  Quite a disparate place  this time from Apple internals  Not sure why they are overlapping   Incorrect comment about NSLog removed     Edited 22 Sep   I wonder what  release  and  stream  do differently than  debug   Not enough source   https   github com macosforge libdispatch blob 8e63547ea4e5abbfe55c0c3064181c4950a791d3 src voucher c  e   getenv  OS ACTIVITY MODE    if  e        if  strcmp e   release      0            mode   voucher activity mode release        else if  strcmp e   debug      0            mode   voucher activity mode debug        else if  strcmp e   stream      0            mode   voucher activity mode stream        else if  strcmp e   disable      0            mode   voucher activity mode disable

User · Answer

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

[ios] Hide strange unwanted Xcode logs

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