iOS: Sometimes app is terminated - ios

Question

My developing iOS application is sometimes terminated after the method addSubview: is called in the application delegate (but I'm not sure removeFromSuperview: also involved):
[self.tabBarController.view removeFromSuperview];
[self.window addSubview:navigationController.view];
What that showed in the log is:
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array'
*** Call stack at first throw:
(
0 CoreFoundation 0x019b75a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x01c41313 objc_exception_throw + 44
2 CoreFoundation 0x019ad0a5 -[__NSArrayM objectAtIndex:] + 261
3 <app_name> 0x000186dd -[TableViewController tableView:numberOfRowsInSection:] + 205
4 UIKit 0x00a742b7 -[UISectionRowData refreshWithSection:tableView:tableViewRowData:] + 1834
5 UIKit 0x00a71eb1 -[UITableViewRowData numberOfRowsInSection:] + 110
6 UIKit 0x00b60807 -[UISearchDisplayController _updateNoSearchResultsMessageVisiblity] + 115
7 Foundation 0x01029669 _nsnote_callback + 145
8 CoreFoundation 0x0198f9f9 __CFXNotificationPost_old + 745
9 CoreFoundation 0x0190e93a _CFXNotificationPostNotification + 186
10 Foundation 0x0101f20e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134
11 UIKit 0x008df649 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 4581
12 UIKit 0x008d9254 -[UIWindow _setRotatableViewOrientation:duration:force:] + 89
13 UIKit 0x008db38f -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 794
14 UIKit 0x008d9081 -[UIWindow setDelegate:] + 252
15 UIKit 0x00964dee -[UIViewController _tryBecomeRootViewControllerInWindow:] + 106
16 UIKit 0x00975340 -[UINavigationController viewDidMoveToWindow:shouldAppearOrDisappear:] + 72
17 UIKit 0x008f0e4b -[UIView(Internal) _didMoveFromWindow:toWindow:] + 918
18 UIKit 0x008efa60 -[UIView(Hierarchy) _postMovedFromSuperview:] + 166
19 UIKit 0x008e8750 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1080
20 UIKit 0x008e6aa3 -[UIView(Hierarchy) addSubview:] + 57
21 <app_name> 0x00004971 -[AppDelegate requestFinished:] + 993
22 <app_name> 0x0003e65b -[ASIHTTPRequest reportFinished] + 171
23 Foundation 0x0103e94e __NSThreadPerformPerform + 251
24 CoreFoundation 0x019988ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
25 CoreFoundation 0x018f688b __CFRunLoopDoSources0 + 571
26 CoreFoundation 0x018f5d86 __CFRunLoopRun + 470
27 CoreFoundation 0x018f5840 CFRunLoopRunSpecific + 208
28 CoreFoundation 0x018f5761 CFRunLoopRunInMode + 97
29 GraphicsServices 0x01db11c4 GSEventRunModal + 217
30 GraphicsServices 0x01db1289 GSEventRun + 115
31 UIKit 0x008c5c93 UIApplicationMain + 1160
32 <app_name> 0x00002a30 main + 192
33 <app_name> 0x00002255 start + 53
)
terminate called throwing an exception
How can I find out the reason why the app is terminated by this log and solve it? Thank you.
Note: Edit 1 and Edit 2 were removed.
Edit 3: This implemented code of tableView:numberOfRowsInSection: method works for me:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
if (filteredSectionListOfAddressBook && filteredSectionListOfAddressBook.count)
{
return [[filteredSectionListOfAddressBook objectAtIndex:section] count];
}
else
{
return 0;
}
}
else if (tableView == self.tableView)
{
if (sectionListOfAddressBook && sectionListOfAddressBook.count)
{
return [[sectionListOfAddressBook objectAtIndex:section] count];
}
else
{
return 0;
}
}
return 0;
}

Answer 1

In your stack trace - there is a tableview - you need to ensure that there is data to populate the table. Thats where this error is coming from
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array
You could for the moment ensure there is no data by making sure that
tableView:numberOfRowsInSection: returns 0;
Have you implemented the TableViews delegate methods?
Read about it here About Table Views in iOS-Based Applications
here UITableViewDataSource Protocol Reference
and here UITableViewDelegate Protocol Reference

Answer 2

I just ran into a problem like this in my code, and I found that it was caused by the search delegate holding on to the search bar and the table ref. If a set these properties to nil in searchDisplayControllerDidEndSearch then it got rid of the problem. It was likely caused by a circular ref loop. The stack trace looked like so:
[__NSArrayM _updateNoSearchResultsMessageVisiblity]: unrecognized selector sent to instance 0x21c350
#0 0x3369a1c8 in objc_exception_throw ()
#1 0x338b5aca in -[NSObject doesNotRecognizeSelector:] ()
#2 0x338b4944 in __forwarding__ ()
#3 0x3380f680 in _forwarding_prep_0__ ()
#4 0x30e5aff8 in -[UISearchResultsTableView _numberOfRowsDidChange] ()
#5 0x30d6c3b2 in -[UITableView noteNumberOfRowsChanged] ()
#6 0x30d6bf4e in -[UITableView reloadData] ()