Question

I’m implementing a uinavigationcontroller. The first view is a uitableview (imagine the Contacts app) with a list of names.
The second view is the person profile.
So, when I click a person in the uitable, it’s suppose to load his profile.

How do I pass the person data to the second view?

In didSelectRowAtIndexPath I do:

ContactView * varContactView = [[ContactView alloc] initWithNibName:nil bundle:nil];
varContactView.title = [[contactsArray objectAtIndex:indexPath.row] name];
[varContactView initWithPerson:[contactsArray objectAtIndex:indexPath.row]];
[navigationController pushViewController:varContactView animated:YES];

In the interface of ContactView I’ve got:

Person * person;

And then:

@property (nonatomic, retain) Person * person;
-(void) initWithPerson:(Person *)newperson;

And in .m:

@synthesize person
-(void) initWithPerson:(Person *)newperson{
    person = [[Person alloc] init];
    person = newperson;
}

However, when I try to access person in ContactView, it says always EXC_BAD_ACCESS.

What is wrong here?

Answer 1

Instead of:

[varContactView initWithPerson:[contactsArray objectAtIndex:indexPath.row]];

you can simply use:

varContactView.person = [contactsArray objectAtIndex:indexPath.row];

That will make use of person property setter and assign the given object as varContactView‘s data. The default implementation of that setter is (in case of retain property):

- (void)setPerson:(Person *)newPerson
{
    if (person != newPerson) {
        [person release];
        person = [newPerson retain];
    }
}

That’s what you’re trying to achieve in -initWithPerson: method. That method is not needed, as its functionality is covered by person property setter. BTW, remember to release person property in -dealloc method of your view controller:

- (void)dealloc
{
    [person release];
    [super dealloc];
}

The bad access exception might be caused by something else in your code, though…