How to enable NSZombie in Xcode

Question

I have an app that is crashing with no error tracing  I can see part of what is going on if I debug  but can t figure out which object is  zombie-ing     Does anybody know how to enable NSZombie in Xcode 4

User · Answer

As of Xcode 3 2 5 and Snow Leopard  Mac OS X 10 6   you can run your code through the Zombies instrument  Run  gt  Run with Performance Tool  gt  Zombies  That allows you to see particular objects and their retain counts on a timeline

User · Answer

Environment variables are now part of the  scheme     To edit the scheme and turn on zombies    In the  Product  menu  select  Edit Scheme   Go to the  Run Foo app  stage in the left panel  and the  Arguments  tab on the right  Add NSZombieEnabled to the  Environment Variables  section and set the value to YES  as you could in Xcode 3      In Xcode 4 1 and above  there s also a checkbox on the  Diagnostics  tab of the  Run  stage to  Enable Zombie Objects      With Xcode 6 4

User · Answer

Go to Product - Scheme - edit scheme - Arguments - Environment Variables set NSZombieEnabled   YES

User · Answer

Product   Profile will pop up Instruments  Select zombies from the panel and go nuts

User · Answer

I encountered the same problem with troubleshooting EXC BAD ACCESS and had hard time to find the setting with Xcode 4 2  the latest one that comes with iOS5 SDK   Apple keeps on moving things and the settings are no longer where they used to be    Fortunately  I ve found it and it works for the device  not just Simulator  You need to open the Product menu in the Xcode  select Edit scheme and then choose the Diagnostics tab  There you have  Enable Zombie Objects   Once selected and run in debugger will point you to the double released object  Enjoy   In short  Product- gt Edit Scheme- gt Diagnostics- gt  Click Enable Zombie Objects

User · Answer

Here s a video and explaination how to use Instruments and NSZombie to find and fix memory crashes on iOS  http   www markj net iphone-memory-debug-nszombie

User · Answer

Product   Profile will launch Instruments and then you there should be a  Trace Template  named  Zombies   However this trace template is only available if the current build destination is the simulator - it will not be available if you have the destination set to your iOS device   Also another thing to note is that there is no actual Zombies instrument in the instrument library  The zombies trace template actually consists of the Allocations instrument with the  Enable NSZombie detection  launch configuration set

User · Answer

NSZombieEnabled is used for Debugging BAD ACCESS  enable the NSZombiesEnabled environment variable from Xcode   s schemes sheet  Click on Product Edit Scheme to open the sheet and set the Enable Zombie Objects check box this video will help you to see what i m trying to say

User · Answer

In Xcode 4 5 2 goto Product -  Edit Scheme -  and Under the Diagnostics tab check the check box in between Objective C and Enable Zombie Objects and Click on OK

User · Answer

It s a simple matter of setting an environment variable on your executable  NSZombieEnabled   YES   and then running debugging your app as normal If you message a zombie  your app will crash break to debugger and NSLog a message for you   For more information  check out this CocoaDev page   http   www cocoadev com index pl NSZombieEnabled  Also  this process will become much easier with the release of 10 6 and the next versions of Xcode and Instruments   Just saying

User · Answer

In the preferences of your executable add the environment variable NSZombieEnabled and set the value to YES

User · Answer

in ur XCODE  4 3  next the play button     run     select   edit scheme  the scheme management window will open   click on the Arguments tab   you should see   1- Arguments passed on launch                  2- environment variables  inside the the  2- environment variables  place  Name  NSZombieEnabled Value  YES   And its done

User · Answer

In XCode 4 0  To detect NSZombie in Instruments  select the Simulator as your target  can t detect NSZomboe on device   Run Instruments  CMD I  and select  Zombies  trace template  Enjoy

User · Answer

In xcode 4 2  Goto  Product -  edit scheme -  click Run yourappname app -  Diagonostics -  Enable Zombie object

User · Answer

To enable Zombie logging double-click the executable in the executables group of your Xcode project  At this point click the Arguments tab and in the Variables to be set in the environment  section  make a variable called NSZombieEnabled and set its value to YES

[xcode] How to enable NSZombie in Xcode?

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