Getting the exact location of a UITableViewCell

Question

Given a UITableView, how can I find the location of a specific UITableViewCell? In other words, I want to get its frame relative to my iPhone screen, not relative to the UITableView. So if my UITableView is scrolled up, the location of each UITableViewCell should be higher on the screen, etc.

score 101 · Accepted Answer · answered Jun 08 '11 at 14:31

101

You could also use the rectForRowAtIndexPath method to get the location of a UITableView by sending the indexPath for that.

- (CGRect)rectForRowAtIndexPath:(NSIndexPath *)indexPath

So use as below:

CGRect myRect = [tableView rectForRowAtIndexPath:indexPath];

answered Jun 08 '11 at 14:31

Jhaliya - Praveen Sharma

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In which function are you accessing the `rectForRowAtIndexPath` method ? – Jhaliya - Praveen Sharma Jun 08 '11 at 14:40
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in the didSelectRow... method – CodeGuy Jun 08 '11 at 15:01
@reising1: It must not be crashed,if you still have the same issue you could show the related code . – Jhaliya - Praveen Sharma Jun 08 '11 at 16:20

score 64 · Answer 2 · edited Sep 20 '13 at 20:31

64

Apart from rectForRowAtIndexPath you need to consider the scrolling.

Try this code:

 // Get the cell rect and adjust it to consider scroll offset
 CGRect cellRect = [tableView rectForRowAtIndexPath:indexPath];
 cellRect = CGRectOffset(cellRect, -tableView.contentOffset.x, -tableView.contentOffset.y);

edited Sep 20 '13 at 20:31

Mazyod

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answered Nov 07 '12 at 10:43

Tomasz

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That yields in the screen coordinates of the cell, +1 ! – Yohann T. Nov 10 '12 at 17:41
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+1 for taking into consideration the content offset. This will map the cell to its screen coordinates instead. nice one thanks. – Pavan Feb 20 '13 at 08:28
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The second line can be made simpler: `cellRect = CGRectOffset(cellRect, -tableView.contentOffset.x, -tableView.contentOffset.y);` – Tore Olsen Apr 18 '13 at 12:23
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You may also want to subtract the tableview's contentInsets if you have any `(-tableView.contentOffset.y-tableView.contentInset.top)` – Rob Caraway Feb 11 '14 at 14:20
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`rectForRowAtIndex` will return the rect in the UITableView's coordinate system. Use the `convertRect` method as described here http://stackoverflow.com/questions/687793/determine-coordinates-of-a-uitableviewcell-while-scrolling to convert it to the super view's coordinate system instead of fiddling with the offsets and insets manually. – Kalle Feb 17 '16 at 07:57

score 23 · Answer 3 · answered Jun 08 '11 at 14:26

23

Try the following(sending nil as a toView parameter means you want to convert you rect to window coordinates):

CGRect r = [cell convertRect:cell.frame toView:nil];

And remember that if particular row is not currently visible then there may not be UITableViewCell for it - so before using that code you may need to check if cell is valid (not nil for example)

answered Jun 08 '11 at 14:26

Vladimir

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this is throwing an error. the program terminates. and yes, the cell is visible. – CodeGuy Jun 08 '11 at 14:34
what is the error message? and how do you get your cell object? – Vladimir Jun 08 '11 at 14:37

William Hu · Answer 4 · 2017-06-11T15:08:47.057

17

Swift 3

Relative to the tableView:

let rect = self.tableView.rectForRow(at: indexPath)

Relative to the Screen:

If you only know the cell,

if let indexPath = tableView.indexPath(for: cell) {
     let rect = self.tableView.rectForRow(at: indexPath)
     let rectInScreen = self.tableView.convert(rect, to: tableView.superview)
}

If you know the indexPath then don't need call the if statement.

edited Jun 11 '17 at 15:08

answered Jun 11 '17 at 15:00

William Hu

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score 9 · Answer 5 · edited Jun 03 '15 at 11:56

try it in

didSelectRowAtIndexPath method

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];


        // get current location of selected cell

        CGRect rectInTableView = [tableView rectForRowAtIndexPath:indexPath];

        CGRect rectInSuperview = [tableView convertRect:rectInTableView toView:[tableView superview]];


         NSLog(@"Cell Y Is %f",rectInSuperview.origin.y);

        NSLog(@"Cell X Is %f",rectInSuperview.origin.x);

score 5 · Answer 6 · answered Jun 01 '12 at 13:59

Jhaliya's answer wasn't quite enough for me, I needed to do some more manipulations to get it working. My tableView was added to a viewController and its location on the right half way down the screen. So you need to take the tableView origin into account aswel as the scroll offset.

CGRect rowRect = [tableView rectForRowAtIndexPath:indexPath];
CGPoint offsetPoint = [self.infoTableView contentOffset];

// remove the offset from the rowRect
rowRect.origin.y -= offsetPoint.y;

// Move to the actual position of the tableView
rowRect.origin.x += self.infoTableView.frame.origin.x;
rowRect.origin.y += self.infoTableView.frame.origin.y;

score 1 · Answer 7 · answered Mar 22 '15 at 12:44

For future viewers, I was having trouble getting a reliable frame for cells in a UITableView. I was trying to display a UIAlertController in ActionSheet style on an iPad which needs a popover presentation. In the end this approach yielded the best results:

// 44 is the standard height for a cell in a UITableView
// path is the index path of the relevant row
// controller is the UIAlertController
CGRect frame = CGRectZero;
frame.origin.y = 44 * path.row;
frame.origin.x = table.frame.origin.x;
frame.size = CGSizeMake(table.frame.size.width, 44);
controller.popoverPresentationController.sourceRect = [tableView convertRect:frame toView:self.view];
controller.popoverPresentationController.sourceView = self.view;

I ended up using your answer. Instead of hard coding it to 44 you should use cellForRowAtIndexPath and then use the bounds.height of the cell. — John, Jun 11 '16 at 18:03

score 1 · Answer 8 · answered Feb 01 '17 at 06:17

1

Swift-version of Tomasz and Jhaliya's answers in case anyone (else) struggles with this:

var cellRect = tableView.rectForRow(at: indexPath)
cellRect = cellRect.offsetBy(dx: -tableView.contentOffset.x, dy: -tableView.contentOffset.y)

answered Feb 01 '17 at 06:17

T. Benjamin Larsen

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score 0 · Answer 9 · answered Jun 08 '11 at 14:33

If you really need to convert specifically to a point in the window, you could do this:

[yourAppDelegate.window convertPoint:[cell.contentView.center] fromView:[cell.contentView]];

I used the cells center coordinate, but you could use any point you want.

Vladimir is right, watch out for rows that are not visible (or that have been recycled).

-S

Getting the exact location of a UITableViewCell

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