Understanding zombie trace in Instruments

Question

I am kind of new at ios development and my app crashes because of EXEC_BAD_ACCESS. To detect problem i enabled Zombies and trace Allocations by using Instruments in xCode 4.5 After it detects Zombie Messaged i am having trouble to find which part of code crashes.

Here is the instruments screen shot: Thanks for any help.

Sarisarid

I don't know about Instruments, but you can add a breakpoint to catch all exceptions in Xcode. In the Breakpoints tab, in the bottom left corner there is a plus button. You can add the Exception Breakpoint and see where the exception occurs, if not why. – Grandiloquence

Are you using ARC? It should prevent most of these errors. – Cassiterite

Answer 1

I also have the problem at the beginning of learning Instruments, then I figured out the I have to open the 'Extended detail' Pane to see it.(There might other easy way to enable this, but I did not find yet)

Butylene

Answer 2

It could be interesting to see your code? you might be running some tasks which are causing memory leaks or bad access, e.g; calling some UI related task in background thread. recently in IOS6 had issue with showing alerts with calling [alert show];, if you have the similar scenario then you could replace this show method something like this.

[alert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];

if this is not the issue then you might show your code and someone could help you better that way.

Ahl