NSMutableArray partly empty after recalled - objective-c

Question

I've got a property NSMutableArray in my view controller
ContactsViewController.h:
#interface ContactsViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
#property (nonatomic,strong) NSMutableArray *contacts;
...
#end
In this view controller I fill my array on "viewDidLoad"
ContactsViewController.m:
#implementation ContactsViewController
#synthesize contacts;
...
...
- (void)viewDidLoad
{
[super viewDidLoad];
DBhandler *handler = [[DBhandler alloc] init];
if (contacts)
[contacts removeAllObjects];
else
contacts = [[NSMutableArray alloc] init];
// Get all my contacts that are in my core data file
// This function returns a NSMutableArray
contacts=[handler getContacts];
//loop through contacts of addressbook when user wants that
if ([allContactSwitch isOn])
{
//open link to addressbook
ABAddressBookRef addressBook = ABAddressBookCreate();
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople( addressBook );
CFIndex nPeople = ABAddressBookGetPersonCount( addressBook );
for( CFIndex personIndex = 0; personIndex < nPeople; personIndex++ ) {
ABRecordRef refVal = CFArrayGetValueAtIndex( allPeople, personIndex );
Boolean newContact = true;
// check if contact is already in Core data File
for( CFIndex i = 0; i < [contacts count]; i++ ) {
contact *checkcontact=[contacts objectAtIndex:i];
if (personIndex==checkcontact.personRef)
newContact = FALSE;
}
if (newContact)
{
contact *dummycontact = [[contact alloc]init];
dummycontact.personRef = personIndex;
dummycontact.contactName = (__bridge NSString *)(ABRecordCopyCompositeName( refVal ));
// Add contact to array
[contacts addObject:dummycontact];
}
}
}
// Just to check, the entire array looks fine!
for( CFIndex i = 0; i < [contacts count]; i++ ) {
contact *dummycontact=[contacts objectAtIndex:i];
NSLog(#"Name after build: %#", dummycontact.contactName);
}
}
But later when the different cell for the table view are filled, the part of the NSMutableArray that came from [handle getContacts] are empty:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(#"cell number %i",indexPath.row);
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
// Set up the cell...
contact *dummycontact=[contacts objectAtIndex:indexPath.row];
// Only part of the objects in the array contacts contain data!
NSLog(#"Name cell: %# %i", dummycontact.contactName, indexPath.row);
cell.textLabel.text = dummycontact.contactName;
return cell;
}
This probably has to do with the fact that the memory of the objects created in [handle getContacts] is cleared in the meantime. But I don't know how to solve this. I've tried clone or copy the output of [handle get contacts], but I wasn't successful.
To be complete the function "getContacts":
-(NSMutableArray*)getContacts{
NSMutableArray *contacts = [[NSMutableArray alloc] init];
NSManagedObjectContext *context = [self managedObjectContext];
DBcontact *contact = [NSEntityDescription
insertNewObjectForEntityForName:#"WhappContacts"
inManagedObjectContext:context];
// Test listing all FailedBankInfos from the store
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"WhappContacts"
inManagedObjectContext:context];
[fetchRequest setEntity:entity];
NSError *error;
NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
for (contact in fetchedObjects) {
[contacts addObject:contact];
// Data seems fine here.
NSLog(#"Name in: %#", contact.contactName);
}
return contacts;
}
Any help would be very appreciated!

Answer 1

An alternative would be to place the contact information in a dictionary:
- (NSMutableArray*)getContacts {
NSMutableArray *contacts = [[NSMutableArray alloc] init];
NSManagedObjectContext *context = [self managedObjectContext];
DBcontact *contact = [NSEntityDescription insertNewObjectForEntityForName:#"WhappContacts" inManagedObjectContext:context];
// Test listing all FailedBankInfos from the store
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"WhappContacts" inManagedObjectContext:context];
[fetchRequest setEntity:entity];
NSError *error;
NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
for (contact in fetchedObjects) {
NSDictionary *contactDict = [NSDictionary dictionaryWithObjectsAndKeys:
contact.contactName, #"contactName", nil]; //add other necessary contact information
[contacts addObject:contactDict];
// Data seems fine here.
NSLog(#"Name in: %#", contact.contactName);
}
return contacts;
}
And to retrieve the information:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(#"cell number %i",indexPath.row);
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Set up the cell...
NSDictionary *dummycontact = [contacts objectAtIndex:indexPath.row];
// Only part of the objects in the array contacts contain data!
NSLog(#"Name cell: %# %i", [dummycontact objectForKey:#"contactName"], indexPath.row);
cell.textLabel.text = [dummycontact objectForKey:#"contactName"];
return cell;
}