Question

I want to detect if mytable view has been scrolled, I tried all touch events like this one:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  {
    [super touchesBegan:touches withEvent:event];
    //my code
  }

but it seems that all touch events don’t response to scroll but they response only when cells are touched, moved,…etc

Is there a way to detect scroll event of UITableView ?

Answer 1

If you implement the UITableViewDelegate protocol, you can also implement one of the UIScrollViewDelegate methods:

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

or

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

For example, if you have a property called tableView:

// ... setting up the table view here ...
self.tableView.delegate = self;
// ...

// Somewhere in your implementation file:
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    NSLog(@"Will begin dragging");
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    NSLog(@"Did Scroll");
}

This is because UITableViewDelegate conforms to UIScrollViewDelegate, as can be seen in the documentation or in the header file.