AddressBook Issue While adding more then 500 contacts - iphone

Question

I am working on an iphone application that crashes where a user has a lot of contacts.Below is a function call that causes a crash, but only when a user has approx. more than 500 contacts.Below is a function call.Thanks in advance.
- (IBAction)addToAddressBook{
NSString *importString = [[NSString alloc] init];
importString = importTextView.text;
if (importString==nil) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Could not Find Text"
message:#"Try Pasting the Text Again"
delegate:nil
cancelButtonTitle:#"Cancel"
otherButtonTitles:nil];
[alert show];
[alert release];
}
statusLabel.text = #"Importing Lines";
NSArray *importLines = [importString componentsSeparatedByString:#"\n"];
[importString release];
ABAddressBookRef addressBook = ABAddressBookCreate();
CFRetain(addressBook);
ABRecordRef person;
CFErrorRef error = NULL;
ABMutableMultiValueRef multiPhone;
ABMutableMultiValueRef multiURL = ABMultiValueCreateMutable(kABMultiStringPropertyType);
ABMutableMultiValueRef multiEmail = ABMultiValueCreateMutable(kABMultiStringPropertyType);
ABMutableMultiValueRef multiAddress = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
ABMutableMultiValueRef multiDate = ABMultiValueCreateMutable(kABMultiStringPropertyType);
NSMutableDictionary *addressDictionary;
statusLabel.text = #"Counting Records";
int totalRecords = 0;
for( int j = 0; j < 5; j++){
NSString *line = [importLines objectAtIndex:j];
if ([line rangeOfString: #"Contacts:"].location!=NSNotFound) {
NSString *totalContactsLabel = [[line componentsSeparatedByString:#" Contacts: "] objectAtIndex:1];
totalRecords = [totalContactsLabel intValue];
}
}
int recordNumber = 0;
statusLabel.text = [NSString stringWithFormat:#"%i/%i", recordNumber, totalRecords];
for (NSString *line in importLines)
{
if (![line isEqualToString:#""])
{
NSMutableString *mutableLine = [NSMutableString stringWithString: line];
if ([line hasPrefix:#"---"]) {
//NSLog(#"starting new person");
person = ABPersonCreate();
multiPhone = ABMultiValueCreateMutable(kABMultiStringPropertyType); //clear multiphone for each new person
multiURL = ABMultiValueCreateMutable(kABMultiStringPropertyType);
multiEmail = ABMultiValueCreateMutable(kABMultiStringPropertyType);
multiDate = ABMultiValueCreateMutable(kABMultiStringPropertyType);
multiAddress = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
} else if ([line hasPrefix:#"First Name: "]) {
[mutableLine deleteCharactersInRange: [mutableLine rangeOfString: #"First Name: "]];
line = (NSString *)mutableLine;
ABRecordSetValue(person, kABPersonFirstNameProperty, line, &error);
} else if ([line hasPrefix:#"Middle Name: "]) {
[mutableLine deleteCharactersInRange: [mutableLine rangeOfString: #"Middle Name: "]];
line = (NSString *)mutableLine;
ABRecordSetValue(person, kABPersonMiddleNameProperty, line, &error);
} else if ([line hasPrefix:#"Last Name: "]) {
[mutableLine deleteCharactersInRange: [mutableLine rangeOfString: #"Last Name: "]];
line = (NSString *)mutableLine;
ABRecordSetValue(person, kABPersonLastNameProperty, line, &error);
} else if ([line rangeOfString: #"Phone:"].location!=NSNotFound) {
NSString *phoneLabel = [[line componentsSeparatedByString:#" Phone: "] objectAtIndex:0];
NSString *phoneContent = [[line componentsSeparatedByString:#" Phone: "] objectAtIndex:1];
if ([phoneLabel isEqualToString:#"Mobile"]) {
ABMultiValueAddValueAndLabel(multiPhone, phoneContent, kABPersonPhoneMobileLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, multiPhone, &error);
} else if ([phoneLabel isEqualToString:#"Home"]) {
ABMultiValueAddValueAndLabel(multiPhone, phoneContent, kABHomeLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, multiPhone, &error);
} else if ([phoneLabel isEqualToString:#"Work"]) {
ABMultiValueAddValueAndLabel(multiPhone, phoneContent, kABWorkLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, multiPhone, &error);
} else if ([phoneLabel isEqualToString:#"iPhone"]) {
ABMultiValueAddValueAndLabel(multiPhone, phoneContent, kABPersonPhoneIPhoneLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, multiPhone, &error);
} else {
ABMultiValueAddValueAndLabel(multiPhone, phoneContent, (CFStringRef)phoneLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, multiPhone, &error);
}
}else if ([line rangeOfString: #"Email:"].location!=NSNotFound) {
NSString *emailLabel = [[line componentsSeparatedByString:#" Email: "] objectAtIndex:0];
NSString *emailContent = [[line componentsSeparatedByString:#" Email: "] objectAtIndex:1];
if ([emailLabel isEqualToString:#"Main"]) {
ABMultiValueAddValueAndLabel(multiEmail, emailContent, (CFStringRef)#"Main", NULL);
ABRecordSetValue(person, kABPersonEmailProperty, multiEmail, &error);
}else if ([emailLabel isEqualToString:#"Work"]) {
ABMultiValueAddValueAndLabel(multiEmail, emailContent, kABWorkLabel, NULL);
ABRecordSetValue(person, kABPersonEmailProperty, multiEmail, &error);
} else {
ABMultiValueAddValueAndLabel(multiEmail, emailContent, (CFStringRef)emailLabel, NULL);
ABRecordSetValue(person, kABPersonEmailProperty, multiEmail, &error);
}
}
if ([line hasPrefix:#"- -"]) {
//ABRecordSetValue(person, kABPersonEmailProperty, multiEmail, &error);
NSString *updateText;
NSString *firstName = (NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
NSString *lastName = (NSString *)ABRecordCopyValue(person, kABPersonLastNameProperty);
if (![self personAlreadyExists:firstName withName:lastName]){
ABAddressBookAddRecord(addressBook, person, &error);
ABAddressBookSave(addressBook, &error);
recordNumber++;
if (firstName==nil) {
updateText = [NSString stringWithFormat:#"%# added.", lastName];
} else if (lastName==nil) {
updateText = [NSString stringWithFormat:#"%# added.", firstName];
} else {
updateText = [NSString stringWithFormat:#"%# %# added.", firstName, lastName];
}
//NSLog(updateText);
} else {
if (firstName==nil) {
updateText = [NSString stringWithFormat:#"%# skipped.", lastName];
} else if (lastName==nil) {
updateText = [NSString stringWithFormat:#"%# skipped.", firstName];
} else {
updateText = [NSString stringWithFormat:#"%# %# skipped.", firstName, lastName];
}
//NSLog(updateText);
}
updateLabel.text = [updateLabel.text stringByAppendingFormat:#"%#\n", updateText];
statusLabel.text = #"";
NSLog(#"%i/%i Imported", recordNumber, totalRecords);
}
if (error != NULL) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Could not create contact" delegate:nil cancelButtonTitle:#"Cancel" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
}
//[importLines release];
[activity stopAnimating];
activity.hidden = TRUE;
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Add To Contacts" message:[NSString stringWithFormat:#"Contacts successfully restored!", ABRecordCopyValue(person, kABPersonFirstNameProperty)] delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}