I am not able to figure out what is causing the application crash. A UITableView is being filled with data using the method numberOfRowsInSection. The first two record loads correctly but when the 3rd row is about to load, the app crashes. Please help.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
myDictionary = self.myArray;
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [myDictionary count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"TransHistoryCell";
TransHistoryCell *cell = (TransHistoryCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
@try
{
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"TransHistoryCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
NSDictionary *currentDictionary = [myDictionary objectAtIndex:indexPath.row];
for(NSDictionary *object in currentDictionary)
{
NSString *key = [object valueForKey:@"Key"];
NSString *value = [object valueForKey:@"Value"];
if([key isEqualToString:DATE])
{
cell.dateLabel.text = value;
}
else if([key isEqualToString:TRANSACTION_ID])
{
cell.transactionIdLabel.text = value;
}
else if([key isEqualToString:THIRD_PARTY])
{
cell.thirdPartyLabel.text = value;
}
else if([key isEqualToString:AMOUNT])
{
cell.amountLabel.text = value;
}
else if([key isEqualToString:TRANSACTION_DESC])
{
cell.transactionDescLabel.text = value;
}
}
}
@catch (NSException *exception)
{
NSLog(@"Exception: %@", exception);
}
@finally
{
return cell;
}
}
Exception:
2015-01-14 09:49:12.808 MobileProject[19580:5974561] -[NSNull length]: unrecognized selector sent to instance 0x103796ce0
2015-01-14 09:49:12.812 MobileProject
[19580:5974561] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull length]: unrecognized selector sent to instance 0x103796ce0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001034edf35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000102187bb7 objc_exception_throw + 45
2 CoreFoundation 0x00000001034f504d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x000000010344d27c ___forwarding___ + 988
4 CoreFoundation 0x000000010344ce18 _CF_forwarding_prep_0 + 120
5 UIKit 0x00000001009b2f45 -[UILabel _textRectForBounds:limitedToNumberOfLines:includingShadow:] + 65
6 UIKit 0x00000001009b2da0 -[UILabel textRectForBounds:limitedToNumberOfLines:] + 76
7 UIKit 0x00000001009b6852 -[UILabel _intrinsicSizeWithinSize:] + 170
8 UIKit 0x00000001009b6932 -[UILabel intrinsicContentSize] + 76
9 UIKit 0x0000000100e6cea4 -[UIView(UIConstraintBasedLayout) _generateContentSizeConstraints] + 33
10 UIKit 0x0000000100e6cc64 -[UIView(UIConstraintBasedLayout) _updateContentSizeConstraints] + 422
11 UIKit 0x0000000100e740d6 -[UIView(AdditionalLayoutSupport) updateConstraints] + 163
12 UIKit 0x00000001009b679d -[UILabel updateConstraints] + 272
13 UIKit 0x0000000100e736fa -[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 248
14 UIKit 0x0000000100e738f2 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 124
15 CoreFoundation 0x00000001033f6194 CFArrayApplyFunction + 68
16 UIKit 0x0000000100e7369b -[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 153
17 Foundation 0x0000000101aead6e -[NSISEngine withBehaviors:performModifications:] + 155
18 UIKit 0x0000000100e738f2 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 124
19 CoreFoundation 0x00000001033f6194 CFArrayApplyFunction + 68
20 UIKit 0x0000000100e7369b -[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 153
21 UIKit 0x0000000100e738f2 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:] + 124
22 UIKit 0x0000000100e73dbe __60-[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded]_block_invoke + 96
23 UIKit 0x0000000100e73a86 -[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded] + 231
24 UIKit 0x0000000100c698b8 -[UITableViewCellContentView updateConstraintsIfNeeded] + 95
25 UIKit 0x0000000100e7419e -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeeded] + 159
26 UIKit 0x000000010085ab2d -[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 114
27 UIKit 0x0000000100866973 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 521
28 QuartzCore 0x0000000103d6ade8 -[CALayer layoutSublayers] + 150
29 QuartzCore 0x0000000103d5fa0e _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
30 QuartzCore 0x0000000103d5f87e _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
31 QuartzCore 0x0000000103ccd63e _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 242
32 QuartzCore 0x0000000103cce74a _ZN2CA11Transaction6commitEv + 390
33 QuartzCore 0x0000000103ccedb5 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 89
34 CoreFoundation 0x0000000103422dc7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
35 CoreFoundation 0x0000000103422d20 __CFRunLoopDoObservers + 368
36 CoreFoundation 0x0000000103418b53 __CFRunLoopRun + 1123
37 CoreFoundation 0x0000000103418486 CFRunLoopRunSpecific + 470
38 GraphicsServices 0x000000010338b9f0 GSEventRunModal + 161
39 UIKit 0x00000001007ed420 UIApplicationMain + 1282
40 MobileProject 0x0000000100535c83 main + 115
41 libdyld.dylib 0x0000000107323145 start + 1
42 ??? 0x0000000000000002 0x0 + 2
)
libc++abi.dylib: terminating with uncaught exception of type NSException
you are trying to get the length of what you think is an NSString but is actually NSNull. so check the NSNULL value in both key's ` Key and value