UIApplicationMain crashing in xcode [closed] - ios

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My application is crashing as
#import <UIKit/UIKit.h>
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil); //Thread 1:signal SIGABRT
[pool release];
return retVal;
/*
int retVal = 0;
#autoreleasepool {
NSString *classString = NSStringFromClass([gTalkAppDelegate class]);
#try {
retVal = UIApplicationMain(argc, argv, nil, classString);
}
#catch (NSException *exception) {
NSLog(#"Exception - %#",[exception description]);
exit(EXIT_FAILURE);
}
}
return retVal;
*/
}
2014-01-07 15:41:25.881 testproject[28812:70b] -[__NSCFConstantString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x281d184
2014-01-07 15:41:25.973 testproject[28812:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFConstantString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x281d184'
*** First throw call stack:
(
0 CoreFoundation 0x026d75e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x01c028b6 objc_exception_throw + 44
2 CoreFoundation 0x02774903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
3 CoreFoundation 0x026c790b ___forwarding___ + 1019
4 CoreFoundation 0x026c74ee _CF_forwarding_prep_0 + 14
5 testproject 0x0000e7cd -[SecondViewController showData] + 1837
6 testproject 0x0000829d -[SecondViewController viewDidAppear:] + 1261
7 UIKit 0x0087ac48 -[UIViewController _setViewAppearState:isAnimating:] + 497
8 UIKit 0x0087b1d7 -[UIViewController __viewDidAppear:] + 146
9 UIKit 0x00898fca -[UINavigationController viewDidAppear:] + 191
10 UIKit 0x0087ac48 -[UIViewController _setViewAppearState:isAnimating:] + 497
11 UIKit 0x0087b1d7 -[UIViewController __viewDidAppear:] + 146
12 UIKit 0x008a827b -[UITabBarController viewDidAppear:] + 113
13 UIKit 0x0087ac48 -[UIViewController _setViewAppearState:isAnimating:] + 497
14 UIKit 0x0087b1d7 -[UIViewController __viewDidAppear:] + 146
15 UIKit 0x0087cb9f __64-[UIViewController viewDidMoveToWindow:shouldAppearOrDisappear:]_block_invoke + 44
16 UIKit 0x0087b56a -[UIViewController _executeAfterAppearanceBlock] + 63
17 UIKit 0x007801a9 ___afterCACommitHandler_block_invoke_2 + 33
18 UIKit 0x0078012e _applyBlockToCFArrayCopiedToStack + 403
19 UIKit 0x0077ff7e _afterCACommitHandler + 568
20 CoreFoundation 0x0269f4ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
21 CoreFoundation 0x0269f41f __CFRunLoopDoObservers + 399
22 CoreFoundation 0x0267d344 __CFRunLoopRun + 1076
23 CoreFoundation 0x0267cac3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x0267c8db CFRunLoopRunInMode + 123
25 GraphicsServices 0x035e09e2 GSEventRunModal + 192
26 GraphicsServices 0x035e0809 GSEventRun + 104
27 UIKit 0x00763d3b UIApplicationMain + 1225
28 testproject 0x0000213d main + 125
29 testproject 0x000020b5 start + 53
30 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
How can fix it.

Answer 1

Looking through your stacktrace you can see that in viewDidAppear you call a method called showData this can be seen from the two lines below.
5 gtalkhotdial 0x0000e7cd -[SecondViewController showData] + 1837
6 gtalkhotdial 0x0000829d -[SecondViewController viewDidAppear:] + 1261
Within this showData method you make a call to something (unfortunately we can't tell what) that tries to call -[__NSCFConstantString countByEnumeratingWithState:objects:count:]: and what ever that object is it, it doesn't have this method. To tell you anything more we need to see what is in the method showData. But your crash is clearly happening in there. If you what to know anything else please share that method implementation.

Answer 2

Look at your stack trace, the lines
2 CoreFoundation 0x02774903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
and
5 gtalkhotdial 0x0000e7cd -[SecondViewController showData] + 1837
should help you