UITableView Exception iOS - ios

Question

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

Answer 1

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