iOS crash reports not get the correct line number - iphone

Question

i want to look my mistake line of my app:
0 CoreFoundation 0x36e008a7 __exceptionPreprocess + 186
1 libobjc.A.dylib 0x33217259 objc_exception_throw + 32
2 CoreFoundation 0x36e00789 +[NSException raise:format:] + 0
3 CoreFoundation 0x36e007ab +[NSException raise:format:] + 34
4 Foundation 0x32a8e5b3 +[NSJSONSerialization JSONObjectWithData:options:error:] + 66
5 myshine 0x001f68d1 _mh_execute_header + 1046737
6 myshine 0x000fb27b _mh_execute_header + 17019
7 UIKit 0x35009cab -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1182
8 UIKit 0x350037dd -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 408
9 UIKit 0x34fd1ac3 -[UIApplication handleEvent:withNewEvent:] + 1010
10 UIKit 0x34fd1567 -[UIApplication sendEvent:] + 54
11 UIKit 0x34fd0f3b _UIApplicationHandleEvent + 5826
12 GraphicsServices 0x34f1e22b PurpleEventCallback + 882
13 CoreFoundation 0x36dd4523 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
14 CoreFoundation 0x36dd44c5 __CFRunLoopDoSource1 + 140
15 CoreFoundation 0x36dd3313 __CFRunLoopRun + 1370
16 CoreFoundation 0x36d564a5 CFRunLoopRunSpecific + 300
17 CoreFoundation 0x36d5636d CFRunLoopRunInMode + 104
18 UIKit 0x3500286b -[UIApplication _run] + 550
19 UIKit 0x34fffcd5 UIApplicationMain + 1080
20 myshine 0x000faa33 _mh_execute_header + 14899
21 myshine 0x000f9270 _mh_execute_header + 8816
mac04:skydrive pwang$ dwarfdump --uuid myshine.app.dSYM
UUID: DEB2D948-0339-31BF-B3A3-CE21B73171AC (armv7) myshine.app.dSYM/Contents/Resources/DWARF/myshine
UUID: 90212FF0-80ED-3083-9DFB-FC883F1EDBD0 (armv7s) myshine.app.dSYM/Contents/Resources/DWARF/myshine
mac04:skydrive pwang$ dwarfdump --uuid myshine.app/myshine
UUID: DEB2D948-0339-31BF-B3A3-CE21B73171AC (armv7) myshine.app/myshine
UUID: 90212FF0-80ED-3083-9DFB-FC883F1EDBD0 (armv7s) myshine.app/myshine
mac04:skydrive pwang$ /Applications/Xcode.app/Contents/Developer/usr/bin/atos -arch armv7 -o myshine.app/myshine 0x001f68d1
0x001f68d1 (in myshine)
it give me the 0x001f68d1,not the mistake line. can you tell me what should i do can get the correct line

Answer 1

Here are some links to how you can do attempt to read that crash report:
Symbolicating iPhone App Crash Reports
Ray Wenderlich tutorial HERE
That being said, sometimes you will not get the correct line for an error in your project. For example if you have instantiated a an unretained pointer for an object and something else tries to point to it after the retain count is zero, that will cause an error (bad access), but in reality the place where that bad access crash happens is not the place where the issue is (the declaration of the pointer). My first step (usually before trying to analyze the crash report, unless it is obvious), is to set a break point and then step through the code until the app crashes. You can also use break points and customize them to continue while sending output to the debugger or playing a sound, etc. See THIS tutorial for some info on debugging techniques.

Answer 2

Logs suggest that NSJSONSerialization is raising an exception. Write a try-catch block and put the exception causing code in it. Print the exception details, and you will come to know the issue.
You can also add a breakpoint for objc_exception_throw and +[NSException raise:format:] and debug the code. When the error condition occurs you will be able to trace the chain of events that caused this error. Refer to this link to see how to add these breakpoints.