NSObject's 'description' method giving parentheses as output? - iphone

Question

So, I'm debugging an app I'm building and using the description method to help me find the problem. But instead of giving me the app as a string it is printing out parentheses instead. Please help!
Here's the code:
- (void)viewDidLoad {
[super viewDidLoad];
reminders = [[NSMutableArray alloc] init];
currentTitle = [[NSMutableString alloc] init];
currentDate = [[NSMutableString alloc] init];
currentSummary = [[
NSMutableString alloc] init];
currentLink = [[NSMutableString alloc] init];
NSLog(#"IT'S HERE %#", [reminders description]);}
...
and the error:
[Session started at 2010-10-04 22:15:16 -0400.]
2010-10-04 22:15:17.434 Reminders[5824:207] ******* Accessibility Status Changed: On
2010-10-04 22:15:17.464 Reminders[5824:207] ********** Loading AX for: com.yourcompany.Reminders ************
2010-10-04 22:15:17.506 Reminders[5824:207] IT'S HERE (
)
2010-10-04 22:15:17.510 Reminders[5824:207] Hello
2010-10-04 22:15:17.512 Reminders[5824:207] (
)
2010-10-04 22:15:17.514 Reminders[5824:207] PVC: <UITableView: 0x602d600; frame = (0 20; 320 460); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x5f3f3b0>; contentOffset: {0, 0}>
2010-10-04 22:15:17.514 Reminders[5824:207] It's here
2010-10-04 22:15:17.515 Reminders[5824:207] Loaded
2010-10-04 22:15:17.520 Reminders[5824:207] -[__NSCFArray name]: unrecognized selector sent to instance 0x6a4b640
2010-10-04 22:15:17.523 Reminders[5824:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFArray name]: unrecognized selector sent to instance 0x6a4b640'
*** Call stack at first throw:
(
0 CoreFoundation 0x0248bb99 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x025db40e objc_exception_throw + 47
2 CoreFoundation 0x0248d6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x023fd2b6 ___forwarding___ + 966
4 CoreFoundation 0x023fce72 _CF_forwarding_prep_0 + 50
5 Reminders 0x00003aa9 -[RootViewController tableView:cellForRowAtIndexPath:] + 300
6 UIKit 0x00090d6f -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:withIndexPath:] + 619
7 UIKit 0x00086e02 -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:] + 75
8 UIKit 0x0009b774 -[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] + 1561
9 UIKit 0x000937ec -[UITableView layoutSubviews] + 242
10 QuartzCore 0x03f60481 -[CALayer layoutSublayers] + 177
11 QuartzCore 0x03f601b1 CALayerLayoutIfNeeded + 220
12 QuartzCore 0x03f592e0 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 302
13 QuartzCore 0x03f59040 _ZN2CA11Transaction6commitEv + 292
14 UIKit 0x0002204e -[UIApplication _reportAppLaunchFinished] + 39
15 UIKit 0x00022477 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 545
16 UIKit 0x0002c3ec -[UIApplication handleEvent:withNewEvent:] + 1958
17 UIKit 0x00024b3c -[UIApplication sendEvent:] + 71
18 UIKit 0x000299bf _UIApplicationHandleEvent + 7672
19 GraphicsServices 0x026fa822 PurpleEventCallback + 1550
20 CoreFoundation 0x0246cff4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
21 CoreFoundation 0x023cd807 __CFRunLoopDoSource1 + 215
22 CoreFoundation 0x023caa93 __CFRunLoopRun + 979
23 CoreFoundation 0x023ca350 CFRunLoopRunSpecific + 208
24 CoreFoundation 0x023ca271 CFRunLoopRunInMode + 97
25 UIKit 0x00021c6d -[UIApplication _run] + 625
26 UIKit 0x0002daf2 UIApplicationMain + 1160
27 Reminders 0x00002078 main + 102
28 Reminders 0x00002009 start + 53
)
terminate called after throwing an instance of 'NSException'
Here's the method that you asked for fluchtpunkt
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
Reminder *theReminder = [reminders objectAtIndex:indexPath.row];
cell.textLabel.text = theReminder.name;
return cell;
}

Answer 1

those parentheses are the output I would expect if I NSLog an empty array.
This is absolutely correct.
the exception is raised because you try to call a name method on an NS(Mutable)Array. And arrays don't respond to name.
To find the cause of this Exception post the code of this method in your RootViewController
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath