Objective-C, iOS, NSKeyedUnarchiver, only getting data in one cell - objective-c

Question

I tried for loops etc.. but nothing seem to work. I have a textfield and once I hit save, I puts the text in a table cell, If I do it again, the previous entry gets replaced. Basically, I can't seem to add another cell unless I manually addObject to the array. The data get pulled properly I used NSLog and the data saves as well.
I think the problem is here somewhere:
NSFileManager *filemgr;
NSString *docsDir;
NSArray *dirPaths;
filemgr = [NSFileManager defaultManager];
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the data file
datafilePath = [[NSString alloc] initWithString: [docsDir
stringByAppendingPathComponent: #"data.archive"]];
tablesubtitles = [[NSMutableArray alloc]init];
tabledata = [[NSMutableArray alloc] init];
// Check if the file already exists
if ([filemgr fileExistsAtPath: datafilePath])
{
NSMutableArray *dataArray;
dataArray = [NSKeyedUnarchiver
unarchiveObjectWithFile: datafilePath];
titlestring = [dataArray objectAtIndex:0 ];
detailsstring = [dataArray objectAtIndex:1];
[tabledata addObject:titlestring];
[tablesubtitles addObject:detailsstring];
}
here is the other method for the actual table:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
{
UITableViewCell *cell = nil;
cell = [tableView dequeueReusableCellWithIdentifier:#"homeworkcell"];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"homework"];
}
NSString *cellValue = [tabledata objectAtIndex:indexPath.row];
NSString *subtitle = [tablesubtitles objectAtIndex:indexPath.row];
cell.textLabel.text= cellValue;
cell.detailTextLabel.text= subtitle;
cell.textLabel.font = [UIFont systemFontOfSize:14.0];
cell.textLabel.backgroundColor = [ UIColor clearColor];
cell.detailTextLabel.backgroundColor = [UIColor clearColor];
// Configure the cell.
//-----------------------------------------START----------------------------Set image of cell----
cellImage = [UIImage imageNamed:#"checkboxblank.png"];
cell.imageView.image = cellImage;
//--------------------------------------------END---------------------------end set image of cell--
return cell;
}
here is where I'm saving the data:
NSMutableArray *contactArray;
contactArray = [[NSMutableArray alloc] init];
[contactArray addObject:titlefield.text];
[contactArray addObject:detailstextfield.text];
[contactArray addObject:date ];
[NSKeyedArchiver archiveRootObject:
contactArray toFile:datafilePath];

Answer 1

Do you recreate each time table data model?
tablesubtitles = [[NSMutableArray alloc]init];
tabledata = [[NSMutableArray alloc] init];
You should make class variables for this.