StackOverflow2013

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POUITableView crashes on scrolling
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copied!<p>I am facing a problem in table view, the application crashes as soon as i scrolldown and try to select a row. Error I am getting in console is</p> <pre><code>Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil' </code></pre> <p>Please help me to understand why i am getting this error, I dont think there is any nil element in my array, let me show you the code </p> <p>I have created a SelectContactViewController in which a user can select number of contact so the files are </p> <p>SelectContactController.h</p> <pre><code>#import <UIKit/UIKit.h> #import <AddressBook/AddressBook.h> #import <AddressBookUI/AddressBookUI.h> @interface SelectContactController :UIViewController <UITableViewDataSource, UITableViewDelegate> { NSArray *selectedImageIds; NSArray *selectContacts; } @property (nonatomic, retain) NSArray *selectContacts; </code></pre> <p>and the implementation file SelectContactController.m</p> <pre><code>#import "SelectContactController.h" @interface SelectContactController () @end @implementation SelectContactController @synthesize selectContacts; - (void)viewDidLoad { [super viewDidLoad]; selectContacts = [[NSArray alloc] init]; selectedRows = [[NSMutableArray alloc] init]; contactDictionary = [[NSMutableDictionary alloc] init]; id appDelegate = (id)[[UIApplication sharedApplication] delegate]; managedObjectContext = [appDelegate managedObjectContext]; selectedImageIds = [appDelegate selectedImageIds]; [self getAddressbookData]; } #pragma mark - Address book Methods -(void)getAddressbookData { #if __IPHONE_OS_VERSION_MIN_REQUIRED < 60000 ABAddressBookRef addressBook = ABAddressBookCreate(); #else CFErrorRef *error = nil; ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, error); #endif NSArray * people; BOOL accessGranted = [self __addressBookAccessStatus:addressBook]; if (accessGranted) { people = (__bridge_transfer NSArray*)ABAddressBookCopyArrayOfAllPeople(addressBook); // Do whatever you need with thePeople... } CFIndex nPeople = ABAddressBookGetPersonCount(addressBook); NSMutableArray *contactArray = [[NSMutableArray alloc] init]; for (CFIndex i = 0; i < nPeople; i++) { ABRecordRef record = CFArrayGetValueAtIndex((__bridge CFArrayRef)(people), i); NSString *firstName = (__bridge NSString *)ABRecordCopyValue(record, kABPersonFirstNameProperty); NSString *lastName = (__bridge NSString *)ABRecordCopyValue(record, kABPersonLastNameProperty); NSString *fullName = nil; if (ABPersonGetCompositeNameFormat() == kABPersonCompositeNameFormatFirstNameFirst) fullName = [NSString stringWithFormat:@"%@ %@", firstName, lastName]; else fullName = [NSString stringWithFormat:@"%@, %@", lastName, firstName]; [contactArray addObject:fullName]; // // Phone Numbers // ABMutableMultiValueRef phoneNumbers = ABRecordCopyValue(record, kABPersonPhoneProperty); CFIndex phoneNumberCount = ABMultiValueGetCount( phoneNumbers ); NSMutableArray *numbersArray = [[NSMutableArray alloc] init]; for ( CFIndex k=0; k<phoneNumberCount; k++ ) { CFStringRef phoneNumberLabel = ABMultiValueCopyLabelAtIndex( phoneNumbers, k ); CFStringRef phoneNumberValue = ABMultiValueCopyValueAtIndex( phoneNumbers, k ); CFStringRef phoneNumberLocalizedLabel = ABAddressBookCopyLocalizedLabel( phoneNumberLabel ); // converts "_$!<Work>!$_" to "work" and "_$!<Mobile>!$_" to "mobile" // Find the ones you want here // // NSLog(@"-----PHONE ENTRY -> name:%@ : %@ : %@", fullName, phoneNumberLocalizedLabel, phoneNumberValue ); [numbersArray addObject:CFBridgingRelease(phoneNumberValue)]; CFRelease(phoneNumberLocalizedLabel); CFRelease(phoneNumberLabel); CFRelease(phoneNumberValue); } // NSLog(@"phone numbers %@", numbersArray); [contactDictionary setObject:numbersArray forKey:fullName]; CFRelease(record); } selectContacts = contactArray; // NSLog(@"dictionary of array %@", contactDictionary); //NSLog(@"contacts count %d", [selectContacts count]); } -(BOOL)__addressBookAccessStatus:(ABAddressBookRef) addressBook { __block BOOL accessGranted = NO; if (ABAddressBookRequestAccessWithCompletion != NULL) { // we're on iOS 6 dispatch_semaphore_t sema = dispatch_semaphore_create(0); ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) { accessGranted = granted; dispatch_semaphore_signal(sema); }); dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER); // dispatch_release(sema); } else { // we're on iOS 5 or older accessGranted = YES; } return accessGranted; } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. NSLog(@"select content count %d", [selectContacts count]); return [selectContacts count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } cell.textLabel.text = [self.selectContacts objectAtIndex:indexPath.row]; return cell; } </code></pre> <p>Please help me to resolve this issue</p>

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