Question

I have a UIButton that is created inside of each table cell. I want to hook up a touch event like so:

[imageButton addTarget:self
                action:@selector(startVote:)
      forControlEvents:UIControlEventTouchUpInside];

I want to pass data about the current row (the id of the object for that row) to the startVote method. Is there a method that I am missing to do this or am I breaking some best practice. This seems like a very normal thing to do?

Answer 1

I assume you have some sort of NSArray with the data that gets passed on to the buttons in cellForRowAtIndexPath.

Try this in startVote:

- (void)startVote:(id)sender {
    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
    NSDictionary *myData = [myArray objectAtIndex:indexPath.row];
}

EDIT:

If for some reason the row is not selected, you can assign a unique tag to every button upon creation and then:

- (void)startVote:(id)sender {
    int myTag = [(UIButton *)sender tag];
    NSDictionary *myData = [myArray objectAtIndex:myTag];
}

Maybe you would do some sort of operation with the tag so it can be used as an index (I add a certain amount to every tag so it will not conflict with “automatic” tagging used by the OS.