Dragging a button from UITableView

Question

I have a TableView made up of a custom cell. This cell contains a label and a button. Now I have a panGestureRecognizer added to the button in the cell. My problem is when I try to start moving/dragging the button, the button moves correctly but unfortunately the button gets hidden behind the TableView. How can I make it to come in front of it. The custom cell is created programmatically and so is the TableView. My gesture handling method is as follows:


-(void)panPiece:(UIPanGestureRecognizer *)gestureRecognizer withEvent:(id) event
{

UIView *piece = [gestureRecognizer view];
[self adjustAnchorPointForGestureRecognizer:gestureRecognizer];

//*******************Dragging Ended*************************************

if([gestureRecognizer state]==UIGestureRecognizerStateEnded)
{
    [tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:YES];

}

//*******************Dragging Started andchanged*************************************

if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] ==UIGestureRecognizerStateChanged) 
{

    CGPoint translation = [gestureRecognizer translationInView:[piece superview]];
    [piece setCenter:CGPointMake([piece center].x + translation.x, [piece center].y + translation.y)];
    [gestureRecognizer setTranslation:CGPointZero inView:[piece superview]];
    CGPoint moveLocation=[gestureRecognizer locationInView:piece];
    NSIndexPath *indexPath=[tableView indexPathForRowAtPoint:moveLocation];


}

-(void)adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan || (gestureRecognizer.state == UIGestureRecognizerStateChanged)) 
    {
        UIView *piece = gestureRecognizer.view;
        CGPoint locationInView = [gestureRecognizer locationInView:piece];
        CGPoint locationInSuperview = [gestureRecognizer locationInView:piece.superview];
        piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);
        piece.center = locationInSuperview;
    }
}

The code has been modelled based on apple's code here

elp elp · Accepted Answer · 2011-05-24T16:13:00

Here the solution: Drag an UIImageView from UIscrollView to another view

hope this helps

Dragging a button from UITableView

1 Answers