How to make UIButton appear in last cell only?

Question

I am fairly new to Objective C programming, and have a UITableView setup with a custom cell. I want to make it so a user can touch a button that will add another cell, and this button will appear in the last cell only. Currently, it is not showing up. Here is the code that I am using. I have created the button within the custom cell, and used "setHidden:YES" to hide it within the cell itself. I am trying "setHidden:NO" to make the button appear in the TableView code, but it is not working. I thought maybe it had something to do with reloading the cell, but I am not sure if I am going in the right direction with this or not. I would appreciate any help on this, thanks.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{workoutTableViewCell *cell = (workoutTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

// Configure the cell...
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
[cell.addButton setTitle:(NSString *)indexPath forState:UIControlStateApplication];
[cell.textLabel setText:[NSString stringWithFormat:@"Row %i in Section %i", [indexPath row], [indexPath section]]];

NSInteger sectionsAmount = [tableView numberOfSections];
NSInteger rowsAmount = [tableView numberOfRowsInSection:[indexPath section]];

if ([indexPath section] == sectionsAmount - 1 && [indexPath row] == rowsAmount - 1) {
    NSLog(@"Reached last cell");
    [cell.addButton setHidden:NO];
    if (lc == NO)
    {[[self tableView] reloadData];
        lc = YES;
    }
}

 return cell;
 }

Best way to do this is add your button to table footer-view. — Yogendra, Jul 04 '14 at 04:46

Janak Nirmal · Accepted Answer · 2014-07-04T05:04:28.137

Following UITableViewDataSource method will help you to return exact number of rows available in section. Here you need to return additional as you want to have last as your button.

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return yourRowCount + 1;
}

Now in folowing method you will check row number using indexpath.row as

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *lastCellIdentifier = @"LastCellIdentifier";
    static NSString *workoutCellIdentifier = @"WorkoutCellIdentifier";

    if(indexPath.row==(yourRowCount+1)){ //This is last cell so create normal cell
        UITableViewCell *lastcell = [tableView dequeueReusableCellWithIdentifier:lastCellIdentifier];
        if(!lastcell){
            lastcell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:lastCellIdentifier];
            CGRect frame = CGRectMake(0,0,320,40);
            UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
            [aButton addTarget:self action:@selector(btnAddRowTapped:) forControlEvents:UIControlEventTouchUpInside];
            aButton.frame = frame;
            [lastcell addSubview:aButton];
        }
        return lastcell;
    } else { //This is normal cells so create your worktouttablecell
        workoutTableViewCell *cell = (workoutTableViewCell *)[tableView dequeueReusableCellWithIdentifier:workoutCellIdentifier];
        //Configure your cell

    }
}

Or you can do like create UIView programatically and set it as FooterView as suggested by @student in comment code would look like,

CGRect frame = CGRectMake(0,0,320,40);
UIView *footerView = [[UIView alloc] initWithFrame:frame];
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton addTarget:self action:@selector(btnAddRowTapped:) forControlEvents:UIControlEventTouchUpInside];
aButton.frame = frame;
[footerView addSubView:aButton];
[yourTableNmae setTableFooterView:footerView];

Declare method as follow

-(IBAction)btnAddRowTapped:(id)sender{
    NSLog(@"Your button tapped");
}

please edit cellForRowAtIndexPath method in your answer also. It'll help him more. Bcause he has done wrong allocation of cell and not implemented else condition. Thanks @Janak — Yogendra, Jul 04 '14 at 04:55

score 0 · Answer 2 · answered Jul 04 '14 at 04:56

0

if ([indexPath section] == sectionsAmount - 1 && [indexPath row] == rowsAmount - 1) {
    NSLog(@"Reached last cell");
    [cell.addButton setHidden:NO];
} else { 
    [cell.addButton setHidden:YES];
}

Replace this code in your program.

answered Jul 04 '14 at 04:56

Shiva Kumar Ganthi

426
4
18

score 0 · Answer 3 · answered Jul 04 '14 at 07:31

If you know your number of cells in the uitable and you wish to just know when the last row will appear, you could implement the following delegate method

(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath

this method tells the delegate table view is about to draw cell for particular row, simple compare your row with table rowcount.

How to make UIButton appear in last cell only?

3 Answers3