How to know when UITableView-reloadData finished?

Question

Level 1

46 points

How to know when UITableView-reloadData finished?

I'm calling reloadData on my table view and once it is done, I need to select a particular cell, how do I know when the reloadData is finished so I can do the select?

iPhoneOS 3.1 & 3.2

Posted on Sep 30, 2010 7:55 AM

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Answer 1

sptrakesh

Level 4

1,785 points

Sep 30, 2010 8:55 AM in response to danielt63

Does it not work when follow up your invocation of reloadData with the appropriate selectRowAtIndexPath::: method?

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Answer 2

danielt63 Author

Level 1

46 points

Sep 30, 2010 9:54 AM in response to sptrakesh

No, it does not. It gives an error that the section/row doesn't exist. The section/row I want to highlight doesn't exist until after the reload is finished.

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Answer 3

trshivku

Level 1

110 points

Sep 30, 2010 11:11 AM in response to danielt63

Instead of directly calling selectRowAtIndexPath, try performing the selector after a delay. The delay could just be 0.


- (void) selectRowAtIndexPath:(NSIndexPath *) path {
 // Replace animated and scrollPos with the values you want to use
 [tableView selectRowAtIndexPath:path animated:animated scrollPosition:scrollPos];
}
- (void) foo {
 [tableView reloadData];
 [self performSelector:@selector(selectRowAtIndexPath:) withObject:indexPath afterDelay:0.0];
}

-TRS

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Answer 4

danielt63 Author

Level 1

46 points

Sep 30, 2010 11:46 AM in response to trshivku

Thanks trshivku. That's what I was doing as a work around (except I had a 0.5 delay.) It's nice to know that I can put a 0.0 delay.

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