showing data from tableview in a text field objective C/iOS - ios

Question

can't for the life of me figure this out.
so I'm creating a contact list app, very similar to the one that comes with iOS7.
a user creates a name with the GUI on a detail view controller.
user goes back to the main contact list page (master view controller)
user taps on the name/contact they just created
brings them back to the view controller, but it shows what they had entered into the text fields.
User starts with this screen:
User hits the add contact button, adds in the user data here which brings them back to the first screen:
Next, they are brought to the first screen and are able to tap on the contact they've added and should bring up all the details entered (firstname,lastname,phone number etc):
here's my code in my master view controller:
- (void) detailViewControllerWillDissapear: (DetailViewController *) dvc {
NSLog(#"test");
DirectoryEntry *person = [[DirectoryEntry alloc] init];
person.firstName = dvc.txtFirstName.text;
person.lastName = dvc.txtLastName.text;
person.phoneNumber = dvc.txtPhoneNumber.text;
person.address = dvc.txtAddress.text;
[self.entries addObject:person];
NSLog(#"index is %#", person.firstName);
NSLog(#"count of array %lu", (unsigned long)self.entries.count);
dvc.holdData = person;
[self.tableView reloadData];
}
here's my segue:
#pragma mark - segue
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
//DirectoryEntry *person = [[DirectoryEntry alloc] init];
DetailViewController *dvc = segue.destinationViewController;
dvc.delegate = self;
if ([segue.identifier isEqualToString:(#"tappedData")]) {
NSLog(#"what is the person class have %#", dvc.holdData);
// NSLog(#"dvc.holdData = %#", person.firstName);
}
}
so I've created the public variable holdData which is meant to hold all the data which was entered from the array into the Person class. but whenever I add it, just comes up with a Null value. I am able to access the variables i.e. holdData.firstName, but just everything is null.
any ideas? really confused, thanks.

Answer 1

The dvc that you have in prepareForSegue is almost certainly not the same object that you had in the detailViewControllerWillDissapear method. (Try printing their addresses to prove that for yourself.) That means that either your main controller should save the Person data and provide it during the segue or you could create a separate data model that each DetailViewController would use directly.