How to check crash logs in XCODE in iphone sdk

Question

i'm new to the iPhone application development, when i'm running my application in device application is crashing and giving following log in organizer

here is the log report :

Incident Identifier: 23B91310-BCEC-497B-821A-8CF8E709ACF7
CrashReporter Key:   3202fd13cd0c5e4ab0706615fabf36ebc9396206
Hardware Model:      iPod4,1
OS Version:          iPhone OS 4.3.5 (8L1)
Kernel Version:      Darwin Kernel Version 11.0.0: Sat Jul  9 00:59:43 PDT 2011; root:xnu-    1735.47~1/RELEASE_ARM_S5L8930X
Date:                2012-08-22 10:45:15 +0530
Time since snapshot: 54 ms

Free pages:        588
Wired pages:       16800
Purgeable pages:   38
Largest process:   BJS

 Processes
     Name                 UUID                    Count resident pages
         BJS <312d3dae46e433f9982c26738e40060b>   36928 (jettisoned) (active)
  debugserver <919dbac91c0e3133a517d6c7a99e667e>     184
    SCHelper <f8cf7ee034ac3991a79d8c78e435c1e7>     131
  Preferences <cbdecd3d02e031e48e9675235a51306c>    1045 (jettisoned)
  springboardservi <5ab19f16a3973514b6d7d62201d6abde>     309
   syslog_relay <344c7c41bec5360aae33f4fd412ea95f>      94
  notification_pro <698dca6c4cba390a8017315bd25f18f8>     112
   syslog_relay <344c7c41bec5360aae33f4fd412ea95f>      97
  notification_pro <698dca6c4cba390a8017315bd25f18f8>     108
        ptpd <6072e173aed83310b9b7589a70a24b0b>     580
    talkmeim <eb62d6230d5f304f9819c6aebc2d2298>    1141 (jettisoned)
         lsd <3fafa485b73836acb973d50feabd963a>     248
     notifyd <9966082842de313a8e05a001c783faf4>     126
    BTServer <01550e9527353eecae41ebee0f889603>     308
  CommCenter <7d9446365b4836968ae361626ef8f939>     271
        misd <8f94228bddf8342994baf5ca9af1154d>     154
 SpringBoard <5c55c6fba0843b0e924e116413b8c9d4>    4143 (active)
  accessoryd <d30e340e36df356bbde3347a6ed1ef87>     148
        apsd <47ffc9ce9f84371588bd3f937aaa20bb>     285
     configd <a6d457fca42732d9ba809d03a2b3e3ae>     401
 fairplayd.N81 <144f0ff89c123fa5a1cfa40da72fb024>     165
     imagent <9e0b26bad4a538a5b0e5e5ee7eeeb7be>     234
   locationd <9088e845dcbe37d890c8758655bf34c6>     685
  mDNSResponder <caf94711b8093dc5bc5736306f8ae818>     198
  mediaremoted <21af791e80823c9f90f0be2b77a3d885>     199
 mediaserverd <c731263114c33a07aef7bccdcf667271>     643
   lockdownd <1c7f2b41744c35dc92f679e90a73e240>     268
     syslogd <d81669e7bdb93f9b9012020beac826f4>     100
 usbethernetshari <25130d2f9a0334e3ae28780250343144>     105
     launchd <e2d41e07a0743a089eadbae765709c82>      84

**End**

can any one pls help how to track the log report.

Answer 1

This isn't an application crash, so much as application termination: iOS has a mechanism called Jetsam (or, officially, memory status) which "jettisons" (i.e. throws out) the largest process (in terms of memory) when physical memory is low. This is a necessary measure because iOS has no swap. In your log, which is generated by jetsam, you can see a list of all the processes which were active, and BJS - which has been thrown out. The format is :

Incident Identifier: Automatically generated GUID for Apple
CrashReporter Key:   Hash, probably of GUID
Hardware Model:      i-Device stepping (4,1 is 4th gen iPod in your case)
OS Version:          Version of iOS
Kernel Version:      Kernel version, as per uname -a
Date:                ... figure this one out
Time since snapshot: How much time has passed - the snapshot may be "dated"

Free pages:        How many free pages of RAM remain. Page = 4k
Wired pages:       How many resident pages
Purgeable pages:   How many pages MAY be freed, if all else fails
Largest process:   The culprit

 Processes
     Name                 UUID                    Count resident pages
         BJS <312d3dae46e433f9982c26738e40060b>   36928 (jettisoned) (active)

Table, as per column header, where (jettisoned) implies jetsam killed you. (active) implies you were the foreground app.

Hope this helps, (if it doesn't - comment or ask me directly)