autolayout UILabel's dynamic height calculation doesn't work when text is empty string?

Question

in iOS 8, I have a UILabel in a UITableViewCell. I want the cell to have dynamic height according to UILabel's text. It works fine. But when the text is a empty string, it seems has a default height, but I want it to be zero.

Here is what I've done:

set cell's constraints using masonry. set top, bottom constraint.
set tableView.estimatedHeight
return UITableViewAutomaticDimension for heightForRow delegate method

So did I do anything wrong? Any help?

[cell setNeedsUpdateConstraints]; [cell updateConstraintsIfNeeded]; add this two method also set labelcentral vertically so you dont need to give top and bottom space so you have to set leading space to margin from where u required — Rushang Prajapati, Dec 30 '15 at 13:01

score 2 · Answer 1 · answered Jan 14 '16 at 08:43

Change your code for heightForRowAtIndexPath to this. This works!

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

   NSString *text = [yourDataSourceArray objectAtIndex:indexPath.row];
   if(text.length > 0 ){
     return UITableViewAutomaticDimension;
   }

   return 0;
}

score 0 · Answer 2 · answered Jan 14 '16 at 08:05

[yourLabel setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisVertical];
[yourLabel setContentHuggingPriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisVertical];

Set your label V compress to a high priority

autolayout UILabel's dynamic height calculation doesn't work when text is empty string?

2 Answers2