- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

if((toInterfaceOrientation == UIDeviceOrientationLandscapeLeft) || (toInterfaceOrientation == UIDeviceOrientationLandscapeRight)) {
NSLog(@”didRotateFromInterfaceOrientation Landscape”);
isPortrait = NO; //Global variable
}
else {
NSLog(@”didRotateFromInterfaceOrientation Potrait”);
isPortrait = YES;
}

1)

If you add two breakpoints, you should be able to debug these exceptions.
To do this, go to Run | Show | Breakpoints and create two global breakpoints
(I do them globally because they are so useful in all my applications).
The first should be named "objc_exception_throw" and its location should be "libobjc.A.dylib".
The second should be "-[NSException raise]" and its location should be "CoreFoundation".
Now, if you start debugging your application with breakpoints enabled,
it should break on the throw of these exceptions.
You should then be able to see the chain of events that led to the exception within the debugger.

2)
int main(int argc, char *argv[]) {
 int retVal;
 NSAutoreleasePool * pool;
 @try
 {
 pool = [[NSAutoreleasePool alloc] init];
 retVal = UIApplicationMain(argc, argv, nil, nil);
 }
 @catch(NSException* e)
 {
 NSLog(@"%@", e.reason);
 }
 @finally
 {
 [pool release];
 }
 return retVal;
}

3) Check the stack trace on the left side :

http://developer.apple.com/library/mac/#documentation/ToolsLanguages/Conceptual/Xcode4UserGuide/Debugging/Debugging.html

#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define DLog(...)
#endif

// ALog always displays output regardless of the DEBUG setting
#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

The DLog macro is used to only output when the DEBUG variable is set (-DDEBUG in the projects’s C flags for the debug confirguration).

ALog will always output text (like the regular NSLog).

The output (e.g. ALog(@”Hello world”) ) will look like this:

-[LibraryController awakeFromNib] [Line 364] Hello world

http://download.cnet.com/OmniDiskSweeper/3000-18512_4-6226.html

And it’s free…

2) In itunes press sync

3) Drag the crashReport file to the xcode organizer (From ~/Library/Logs/CrashReporter/MobileDevice/<DEVICE_NAME>)

4) Press the ‘Device Logs’ on the right side in the organizer

Clean all targets and rebuild.