Question

I only know the first step is to check a row.
Next I think is use a NSMutableArray to record which row is been checked,
and this is my code :

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
        if ([[tableView cellForRowAtIndexPath:indexPath] accessoryType] == UITableViewCellAccessoryCheckmark){

                [[tableView cellForRowAtIndexPath:indexPath] setAccessoryType:UITableViewCellAccessoryNone];
            }

            else {

                [[tableView cellForRowAtIndexPath:indexPath] setAccessoryType:UITableViewCellAccessoryCheckmark];

        }
    }

So, my question is:

1. How to put this checked row’s indexPath into a Array?

2. How to add a delete button that I can delete all the row I selected?

Answer 1

First off declare a NSMutableArray in youre viewController’s .h file.

Like so:

NSMutableArray *checkedRows;

Change youre didSelectRow method like this:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    if ([checkedRows containsObject:indexPath]) {
        [checkedRows removeObject:indexPath];
    }
    else {
        [checkedRows addObject:indexpath];
    }
    [self.tableView beginUpdates]; //Just for animation..
    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    [self.tableView endUpdates];
}

And in youre cellForRow method add this:

if ([checkedRows containsObject:indexPath]){
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else {
    cell.accessoryType = UITableViewCellAccessoryNone;
}