Tuesday, April 10, 2012

Long press on UITableView

I would like to handle a long press on a UITableViewCell to print a "quick access menu". Does someone already did this ?

Particularly the gesture recognize on UITableView ?

Source: Tips4all


  1. First add the long press gesture recognizer to the table view:

    UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]
    initWithTarget:self action:@selector(handleLongPress:)];
    lpgr.minimumPressDuration = 2.0; //seconds
    lpgr.delegate = self;
    [self.myTableView addGestureRecognizer:lpgr];
    [lpgr release];

    Then in the gesture handler:

    -(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
    CGPoint p = [gestureRecognizer locationInView:self.myTableView];

    NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:p];
    if (indexPath == nil)
    NSLog(@"long press on table view but not on a row");
    NSLog(@"long press on table view at row %d", indexPath.row);

    You have to be careful with this so that it doesn't interfere with the user's normal tapping of the cell and also note that handleLongPress may fire multiple times before user lifts their finger.

  2. Use the UITouch timestamp property in touchesBegan to launch a timer or stop it when touchesEnded got fired

  3. Looks to be more efficient to add the recognizer directly to the cell as shown here:
    (scroll to the example at the bottom)