Question

i declare a variable in one class and want to use that variable in the same class but i want to put data into the variable in a different class. How can i fill a variable from another class?

EDIT:

I have this in one class:

NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
NSString *aString = [[managedObject valueForKey:@"data"] description];

Then i have this in another class:

    NSString *stalklabel = aString;

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://news.search.yahoo.com/rss?ei=UTF-8&p=%@&fr=news-us-ss", stalklabel, nil]];

Answer 1

In your first class create a method that returns that string.

+ (NSString*)dataName {
    NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
    NSString *aString = [[managedObject valueForKey:@"data"] description];
}

In the second class, call that method.

- (void)whatEverClass {
    NSString *stalklabel = [FirstClass dataName];

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://news.search.yahoo.com/rss?ei=UTF-8&p=%@&fr=news-us-ss", stalklabel, nil]];
}