Adding colors to a few cells in a table view

Question

I've looked at dozens of answers to this problem on this very site but I still can't get it to work. I, like many before me, want to change the color in a few cells in a table view. I tried putting a conditional if (indexPath.row == ...) then change the color of a few cells to red, but this always results in other cells gradually becoming red changing the more I scroll. I tried moving this code from:

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

To here:

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

But this still doesn't work. How can I change the colors of cells, say, 5. 13, and 40 to be red?

Is the amount of data static or dynamic? – Unheilig Jan 04 '14 at 04:39 — Unheilig, Jan 04 '14 at 04:39

score 0 · Accepted Answer · edited May 23 '17 at 10:24

0

This may be a problem in your cell reuse, that is why you got colours changing when scrolling.

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

//Cell creation code goes here, including cell re-usage

    if(indexPath.row % 2 == 0){
        cell.backgroundColor = [UIColor redColor];
    }
    //This else part is IMPORTANT
    else{
        cell.backgroundColor = [UIColor clearColor];
    }
}

You'll get a better understanding about Cell Reuse in UITableView

edited May 23 '17 at 10:24

Community

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1

answered Jan 04 '14 at 04:26

Bilal Saifudeen

1,677
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Thank you, yes, that is definitely the issue but I'm still not sure how I can resolve it the way I want. I ultimately want 3 groups of colors so I may have to do this in a completely different way. – user3159275 Jan 04 '14 at 04:35
You can give any number of groups of colour, also consider the ELSE part – Bilal Saifudeen Jan 04 '14 at 04:39

Dharmbir Singh · Answer 2 · 2014-01-04T05:09:17.573

0

Please try to use this method..

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(indexPath.row == 5 | indexPath.row == 13 | indexPath.row == 40)
        cell.backgroundColor = [UIColor redColor];
    else 
        cell.backgroundColor = [UIColor clearColor]; 
}

edited Jan 04 '14 at 05:09

answered Jan 04 '14 at 04:33

Dharmbir Singh

17,485
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Maybe I wasn't clear but this is exactly the code I am using that doesn't work. Other cells begin to turn red as I scroll. If I limit it to one cell turning red, exactly 12 cells later another will be red as I scroll. – user3159275 Jan 04 '14 at 04:42
Are you sure for reusable cell. I mean are you using reusable cell?. – Dharmbir Singh Jan 04 '14 at 04:43

score 0 · Answer 3 · edited May 01 '15 at 10:30

If you large number of value you can take in array and put in a condition like

if([array containsObject:indexPath.row])

Otherwise this is good to give color in cell in willDisplayCell

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
    if(indexPath.row == 5 | indexPath.row == 13 | indexPath.row == 40)
        cell.backgroundColor = [UIColor redColor];
    else 
        cell.backgroundColor = [UIColor clearColor];
}

Adding colors to a few cells in a table view

3 Answers3