Question

I’m trying to calculate the necessary height for a cell in a tableview based on what the contents are going to be. This is in - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath.

However, sometimes sizeWithFont is returning 0. I can’t figure out how this is possible, because all the parameters are hardcoded except for one, and I can see that that parameter isn’t changing.

NSString *address = [properties objectAtIndex:1];

CGFloat calculatedSize = [address sizeWithFont:[[UIFont alloc] fontWithSize:15.f] constrainedToSize:CGSizeMake(207.f, 100.f) lineBreakMode:UILineBreakModeWordWrap].height;

NSLog(@"Calculated size for %@: %f", address, calculatedSize);

calculatedSize += 19.f;

return calculatedSize;

This is the output if I go try this several times by going back and forth to the view several times:

Calculated size for 1234 Fake St: 0.000000
Calculated size for 1234 Fake St: 0.000000
Calculated size for 1234 Fake St: 0.000000
Calculated size for 1234 Fake St: 38.000000
Calculated size for 1234 Fake St: 0.000000
Calculated size for 1234 Fake St: 38.000000

Answer 1

Replace:

[[UIFont alloc] fontWithSize:15.0f]

with:

[UIFont systemFontOfSize:15.f]