How do I add a UIActivity Indicator to every Cell and maintain control of each individual indicator

Question

I\'m trying to add an activity indicator to certain cells in my UITableView. I do this successfully in the method didSelectRowAtIndexpath using

    CGRect CellFr         


        

Answer 1

A simple way to do this (assuming you're adding the indicator as in your code) is to first get a collection of the visible cells (or rows) in your table, by calling [tableView visibleCells]. Then iterate through the cells like this:

for (UITableViewCell *cell in [tableView visibleCells]) {
    for (UIView *sub in [cell subViews]) {
        if (sub.tag == 1) { // "1" is not a good choice for a tag here
            UIActivityIndicatorView *act = (UIActivityIndicatorView *)sub;
            [act startAnimating]; // or whatever the command to start animating is
            break;
        }
    }
}

There's more complexity for you to deal with: in your original code, you need to make sure you're not adding an additional activity indicator to a pre-existing cell each time cellForRowAtIndexPath is called, and you need to account for the situation where the user might scroll the table at a later point, exposing cells that do not have their activity indicator turned on.

Answer 2

You can add UIActivityIndicatorView as cell's accessoryView.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    spinner.frame = CGRectMake(0, 0, 24, 24);
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    cell.accessoryView = spinner;
    [spinner startAnimating];
    [spinner release];
}

Answer 3

You need to make a custom UITableViewCell by extending it. Then have a UIActivityIndicatorView as a member of that Cell. Then you can access it and control it on a cell by cell basis.

Answer 4

Assuming that activity view indicator tag is unique in the cell.contentView you can try something like:

UITableViewCell *cell = [tableview cellForRowAtIndexPath:indexpath];

UIActivityIndicatorView *acView = (UIActivityIndicatorView *)[cell.contentView viewWithTag:1];

//acView will be your activitivyIndicator