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rebner

macrumors newbie
Original poster
Jan 26, 2014
4
0
Hello, I am new to Xcode and I keep getting this error and I am not quite sure what it means and how to fix it


2014-01-26 00:23:16.183 SidebarDemo[677:70b] *** Assertion failure in -[UITableView dequeueReusableCellWithIdentifier:forIndexPath:], /SourceCache/UIKit_Sim/UIKit-2903.23/UITableView.m:5261
2014-01-26 00:23:16.186 SidebarDemo[677:70b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to dequeue a cell with identifier map - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'
*** First throw call stack:
(
0 CoreFoundation 0x0222a5e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x016a48b6 objc_exception_throw + 44
2 CoreFoundation 0x0222a448 +[NSException raise:format:arguments:] + 136
3 Foundation 0x01077fee -[NSAssertionHandler handleFailureInMethod:eek:bject:file:lineNumber:description:] + 116
4 UIKit 0x002e9ed3 -[UITableView dequeueReusableCellWithIdentifier:forIndexPath:] + 170
5 SidebarDemo 0x0000d6e9 -[SidebarViewController tableView:cellForRowAtIndexPath:] + 233
6 UIKit 0x002f461f -[UITableView _createPreparedCellForGlobalRow:withIndexPath:] + 412
7 UIKit 0x002f46f3 -[UITableView _createPreparedCellForGlobalRow:] + 69
8 UIKit 0x002d8774 -[UITableView _updateVisibleCellsNow:] + 2378
9 UIKit 0x002ebe95 -[UITableView layoutSubviews] + 213
10 UIKit 0x00270267 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
11 libobjc.A.dylib 0x016b681f -[NSObject performSelector:withObject:] + 70
12 QuartzCore 0x029ed2ea -[CALayer layoutSublayers] + 148
13 QuartzCore 0x029e10d4 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
14 QuartzCore 0x029e0f40 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
15 QuartzCore 0x02948ae6 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
16 QuartzCore 0x02949e71 _ZN2CA11Transaction6commitEv + 393
17 QuartzCore 0x02a06430 +[CATransaction flush] + 52
18 UIKit 0x00221dc9 _afterCACommitHandler + 131
19 CoreFoundation 0x021f24ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
20 CoreFoundation 0x021f241f __CFRunLoopDoObservers + 399
21 CoreFoundation 0x021d0344 __CFRunLoopRun + 1076
22 CoreFoundation 0x021cfac3 CFRunLoopRunSpecific + 467
23 CoreFoundation 0x021cf8db CFRunLoopRunInMode + 123
24 GraphicsServices 0x027c59e2 GSEventRunModal + 192
25 GraphicsServices 0x027c5809 GSEventRun + 104
26 UIKit 0x00205d3b UIApplicationMain + 1225
27 SidebarDemo 0x0000c76d main + 141
28 libdyld.dylib 0x0386a70d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)



Thank you to all who help in advance!
 

MacMan988

macrumors 6502a
Jul 7, 2012
770
93
What do you have in the
Code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
method?
 

rebner

macrumors newbie
Original poster
Jan 26, 2014
4
0
What do you have in the
Code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
method?


I have:
Code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *CellIdentifier = [self.menuItems objectAtIndex:indexPath.row];
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    
    return cell;
}
 
Last edited by a moderator:

Duncan C

macrumors 6502a
Jan 21, 2008
853
0
Northern Virginia
I have:
Code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *CellIdentifier = [self.menuItems objectAtIndex:indexPath.row];
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    
    return cell;
}

Your code suggests that you are using a different identifier for each cell in your table view. That's wrong, and a bad idea even if it's intentional.

The more often the table view is able to recycle an already-built cell, the faster and more memory efficient your table view will be.

You want a unique identifier for each unique TYPE of cell in your table view. If you have 3 sections of cells, say and the first section displays pairs of pictures, the second section displays 3 labels, and the third section displays a larger picture and a text view, you would have a unique identifier for each of the 3 types of cells.

Where are your cells defined? What identifier are you using?
 

rebner

macrumors newbie
Original poster
Jan 26, 2014
4
0
Your code suggests that you are using a different identifier for each cell in your table view. That's wrong, and a bad idea even if it's intentional.

The more often the table view is able to recycle an already-built cell, the faster and more memory efficient your table view will be.

You want a unique identifier for each unique TYPE of cell in your table view. If you have 3 sections of cells, say and the first section displays pairs of pictures, the second section displays 3 labels, and the third section displays a larger picture and a text view, you would have a unique identifier for each of the 3 types of cells.

Where are your cells defined? What identifier are you using?

I am new to all of this and was following a tutorial on creating a side view menu.

This is what the storyboard and delegates look like:
JwslmIs


My full code for the MainViewController.m is located here:
http://pastebin.com/avAEAduD
 

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