Hide Null UItableView Cells/Rows

Question

I currently have a uitableview in place.

The data is obtained from an sqlite file.

Each column of the sqlite file will represent a list of: labels, images etc

The code i am using to get rows is

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  AppDelegate* appdelegate = (AppDelegate*) [[UIApplication sharedApplication]delegate];
  return [appdelegate.arrayDatabase count];

}

The code to populate the cells

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

  static NSString *simpleTableIdentifier = @"simpleTableIdentifier";

  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
  if (cell == Nil)
  {
    cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
  }

  AppDelegate * appdelegate = (AppDelegate*)[[UIApplication sharedApplication]delegate];
  ShowsList *sShows = [appdelegate.arrayDatabase objectAtIndex:indexPath.row];
  cell.textLabel.text = [sShows strName ];
}

The problem i am having:

I want to use the labels column to populate the cell text of ViewController1.tableview but it is returning the null rows and displaying empty rows/cells in the view.

However I want to hide the rows by either counting the null cells and applying the count to the numberOfRowsInSection: method or by simply hiding empty cells.

Hide empty cells in UITableView & How to hide a section in UITableView? looks like something similar but didn't resolve my issue.

Could somebody please point me down the correct path or provide the answer :)

Thanks so much

Thomas

what are getting in appdelegate.arrayDatabase? did you get something? — Sudha Tiwari, Dec 28 '12 at 12:05
Are you getting empty string as @"" or what, in your model/array ? — Anoop Vaidya, Dec 28 '12 at 12:10
@sudha If i do NSLog(@"%d",[appdelegate.arrayDatabase count]); is returns 30. Instead i want to count only column 1 in the database. This i think would resolve the problem. any ideas? — Tom, Dec 28 '12 at 12:20

score 2 · Answer 1 · answered Dec 28 '12 at 11:40

2

Add this code

-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{
    
    
    return [[UIView alloc]init];
    
}

OR

There is alternate solution

you can set height of UITableView in numberOfRowsInSection function, having height as [array count]*(cell height)

Hope it helps you..

answered Dec 28 '12 at 11:40

P.J

6,547
9
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Thanks for the quick response. But it dosnt seem to solve to problem. any ideas? – Tom Dec 28 '12 at 11:43

score 1 · Accepted Answer · answered Dec 28 '12 at 12:16

just implement a reloadTableData method like that

- (void)reloadTableData
{
// do a reload maybe from db and get yourobjects eg dbItems
// _tableItems = [NSMutableArray array];
    for (ShowsList *list in dbItems) {
        if ([list strName].length) {
            [_tableItems addObject:list];
        } 
    } 
}

then just use _tableItems array to populate your tableview

use [self reloadTableData] instead [self.tableview reloadData]

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

  return _tableItems.count;

}

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

  static NSString *simpleTableIdentifier = @"simpleTableIdentifier";

  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
  if (cell == Nil)
  {
    cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
  }

  ShowsList *sShows = [_tableItems objectAtIndex:indexPath.row];
  cell.textLabel.text = [sShows strName ];
}

score 0 · Answer 3 · answered Dec 28 '12 at 12:02

0

You should create a mutable copy of your data object. Iterate to it first. Remove null/blank entries. Now use this modified collection for tableViewDelegate methods.

answered Dec 28 '12 at 12:02

Apurv

17,116
8
51
67

score 0 · Answer 4 · answered Dec 28 '12 at 12:16

0

Assuming you are getting @"" in the model from which you are populating the UITableView.

You can remove that blank like this:

[_arrays removeObjectIdenticalTo:@""];

And use this filtered array as your model to populate the tableview.

answered Dec 28 '12 at 12:16

Anoop Vaidya

46,283
15
111
140

score 0 · Answer 5 · answered Dec 28 '12 at 12:28

In your viewDidLoad set the table footer as:

[yourTableView.tableFooterView setFrame:CGRectMake(0, 0, yourTableView.frame.size.width, 1)];

The footer is not used. But making its frame to sizeZero might crash the application, so use footer with height 1. This worked for me. Hope it helps.

Hide Null UItableView Cells/Rows

5 Answers5