Accessing array from a different view controller issue - iphone

Question

I'm trying to access an array from a custom UITableViewCell subclass. The array is created in my tableViewController. This is driving me crazy. I access other view controller's objects all the time with ViewController *vcInstance. I actually need to edit the array from my cell subclass, but I can't even NSLog it from my cell view controller. The array logs perfectly in my tableViewController. All I get is null from the cell subclass.
CustomCell.h
#property (retain, nonatomic) SongsViewController *vc;
CustomCell.m
#synthesize vc;
-(IBAction)setStateOfObjects
{
NSMutableArray *array = [[NSMutableArray alloc] initWithArray:vc.parseTrackArray];
NSLog(#"%#", array);
}
I've also simply tried: CustomCell.m
-(IBAction)setStateOfObjects
{
SongsViewController *vc;
NSLog(#"%#", vc.parseTrackArray);
}

Answer 1

EDIT: You're not quite understanding how object referencing works. When you request an object from an array, or some other object that is "retaining" it, you are not creating a new object. So, you don't end up with your "previous object" and an "updated object". Consider this:
NSMutableDictionary *dict = [array objectAtIndex:index];
[dict setObject:#"Hello" forKey:#"Status"];
//You don't need to add *dict back to the array in place of the "old" one
//because you have been only modifying one object in the first place
[array replaceObjectAtIndex:index withObject:dict]; //this doesn't do anything
Considering that...
The way you're going about this is backwards. Make a property in your UITableVieCell subclass for your array
interface CustomCell : UITableViewCell
#property (nonatomic,retain) NSMutableArray *vcArray;
#end
#import CustomCell.h
#implementation CustomCell
#synthesize vcArray;
-(IBAction)setStateOfObjects {
NSMutableDictionary *dictionary = [parseTrackArrayToBeModified objectAtIndex:currentIndex];
[dictionary setObject:[NSNumber numberWithBool:YES] forKey:#"sliderEnabled"];
//THIS LINE IS REDUNDANT
//[parseTrackArrayToBeModified replaceObjectAtIndex:currentIndex withObject:dictionary];
//END REDUNDANT LINE
}
//in your ViewController's delegate method to create the cell
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//assume previous code has CustomCell created and stored in variable
CustomCell *cell;
cell.vcArray = self.parseTrackArray;
return cell;
}

Answer 2

Retaining your SongsViewController seems like a bad idea. If you are using iOS 5, that should probably be weak, if before iOS 5, assign. You're likely creating a retain cycle (memory leak) with that.
When you create the CustomCell (probably in tableView:cellForRowAtIndexPath:) in SongsViewController, are you setting it's vc property?
[yourCell setVc:self];