iphone - EXC_BAD_ACCESS (code=2, address=0x3) -


hi getting following error code: 

exc_bad_access (code=2, address=0x3)

when press play looped cfretain.

i can't figure out what's problem this.

xcode pointing @ line: 

[nsdictionary dictionarywithobjectsandkeys:[self getcorrectname:oldcontroller], @"viewcontroller", sec, @"duration", nil];

i checked both values of dictionary , seem check out.

enter image description here

- (nsstring *)getcorrectname:(uiviewcontroller *)viewcontroller {     if (viewcontroller.class == [uinavigationcontroller class]) {         uiviewcontroller *vc = [viewcontroller.childviewcontrollers objectatindex:0];         return nsstringfromclass(vc.class);     } else {         return nsstringfromclass(viewcontroller.class);     } }  # pragma mark - uitabbarcontrollerdelegate  - (bool)tabbarcontroller:(uitabbarcontroller *)tbcontroller shouldselectviewcontroller:(uiviewcontroller *)viewcontroller {     // tracking controller clicked     [[mixpanel sharedinstance] track:@"tab_clicked"                           properties:[nsdictionary dictionarywithobjectsandkeys:                                       [self getcorrectname:viewcontroller], @"viewcontroller", nil]];      // tracking how long spent on last controller     uiviewcontroller *oldcontroller = [self.childviewcontrollers objectatindex:self.selectedindex];     if (viewcontroller != oldcontroller) {         nstimeinterval secondsbetween = [self.start timeintervalsincenow];         nsinteger sec = -1 * (secondsbetween + 0.5);          // round , down         if (sec > 0) {             nslog(@"changing controllers %@, %d seconds", [self getcorrectname:oldcontroller], sec);             [nsdictionary dictionarywithobjectsandkeys:[self getcorrectname:oldcontroller], @"viewcontroller", sec, @"duration", nil];             /*             [[mixpanel sharedinstance] track:@"tab_viewed"                                   properties:[nsdictionary dictionarywithobjectsandkeys:                                               [self getcorrectname:oldcontroller], @"viewcontroller", sec, @"duration",                                               nil]];              */             self.start = [nsdate date];         }     }     return yes; }

any ideas?

nsinteger not class.

use nsnumber


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