Delete all rows in a tableview

Question

I added a button on the uinavigationbar I want to use it to delete all the rows of uitablview

How can I do that?

[self.tableView reloadData]

is not working here

don't forget to delete the data from your dataSource before calling reloadData — Matthias Bauch, Feb 07 '14 at 07:27
When you don't state how you populate your table, what is the point of asking one how to clear table rows? -1 — El Tomato, Feb 07 '14 at 07:30

score 3 · Accepted Answer · answered Feb 07 '14 at 08:55

3

On the button action event remove all the objects from itemArray then reload tableView data. Before this make sure that in tableView delegate numberOfRowInsection you are passing itemArray count like that:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{
    return [itemArray count];
}

// button action//

-(IBAction)deleteTableViewData
{
     [itemArray removeAllObjects];
     [tableView reloadData];
}

answered Feb 07 '14 at 08:55

Ruchika Gupta

96
4

i checked this code.it not workedi checked this code.it not worked – Praphin SP Feb 07 '14 at 09:42
can you please show the error or your navigation bar button action – Ruchika Gupta Feb 07 '14 at 09:45
k.i'll update my question in few minutes – Praphin SP Feb 07 '14 at 09:46

score 2 · Answer 2 · answered Feb 07 '14 at 07:27

2

First remove all objects from the datasource:

[dataArray removeAllObjects]

and then reload the UITableView

[self.tableView reloadData]

answered Feb 07 '14 at 07:27

iCode

1,456
1
15
26

1

i checked this code.it not worked – Praphin SP Feb 07 '14 at 09:39
@PraphinSP How do you manage your datasource? – iCode Feb 07 '14 at 09:42
there is no mistake in delegate and datasourse – Praphin SP Feb 07 '14 at 09:44

score 1 · Answer 3 · answered Feb 07 '14 at 07:27

1

[array removeAllObjects];

Clear the data source and then reload the data

answered Feb 07 '14 at 07:27

Sekhar

341
2
13

1

i checked this code.it not worked – Praphin SP Feb 07 '14 at 09:40

score 1 · Answer 4 · answered Feb 07 '14 at 08:26

You are using an array to populate the UITableView. Remove all the objects from there and reload your data.

Make sure your numberOfRowsInSection is returning the array count and not a static value. And then do this:

[dataSourceArray removeAllObjects];
[tableView reloadData];

Delete all rows in a tableview

4 Answers4