Change the UITableViewCell Height According to Amount of Text

Hi Josh,

Using tableView:heightForRowAtIndexPath: you can give the size of each row at run time. now your problem is how to get height from your string there are function in NSString class by this code your problem,

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
  NSString *str = [dataSourceArray objectAtIndex:indexPath.row];
    CGSize size = [str sizeWithFont:[UIFont fontWithName:@"Helvetica" size:17] constrainedToSize:CGSizeMake(280, 999) lineBreakMode:NSLineBreakByWordWrapping];
    NSLog(@"%f",size.height);
    return size.height + 10;
}

by below line you set your label`s num. of line to max. so set it in cellForRowAtIndexPath: method.

cell.textLabel.numberOfLines = 0;

if you use some custom cell then manage all label`s string with this and get sum of all that height then set the height of your cell.

Edit : iOS 8 onwards if you set proper autolayout constraints to label then you have to set only following delegate method to achieve this.

-(CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {
   //minimum size of your cell, it should be single line of label if you are not clear min. then return UITableViewAutomaticDimension;    
   return UITableViewAutomaticDimension; 
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewAutomaticDimension;
}

that`s it. no any calculation required. For more information check this tutorial.

In your CustomCell: Remember to add the constraint top and bottom for your UILabel

For adjust UILabel height depend on text just change UILabel line to 0 (see the answer here)

Then in your code, just only set 2 line

self.tableView.estimatedRowHeight = 80;
self.tableView.rowHeight = UITableViewAutomaticDimension;

Here is my custom cell
Here is my UILabel constraints

The screen you will achieve

=== Suggestion ===
IF your cell has some UILabels and Images (not like my example) then:

• You should put all UILabels and Images to one GroupView (View)
• Add the constraint top and bottom to supper view for this GroupView (like the UILabel in my image)
• Adjust UILabel height like the my suggestion above
• Adjust the GroupView height depend on the content (the content is all UILabels and Images)
• Finally, change estimateRowHeight and tableView.rowHeight like the code above

Hope this help

Its simple, just add this to your code:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewAutomaticDimension;
}

It automatically count an height of row and than return a float... :-)

Hope this helps!

Based on the code you have provided, I think you are increasing only the cell height and not the cell.textLabel's height.

Ideally, you should set the frame size of cell.textLabel and the cell for you to see the full text in the cell.

A neat way to see whats wrong with a view in terms of size, is to color it different than the background (try setting cell.textLabel background to yellow) and see if the height is actually being set.

Here's how it should be

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    cell.textLabel.lineBreakMode = NSLineBreakByWordWrapping;
    cell.textLabel.numberOfLines = 0;
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:17.0];

    NSString *cellText = @"Go get some text for your cell.";
    UIFont *cellFont = cell.textLabel.font;
    CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
    CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
    cell.textlabel.frame.size = labelSize; 
    cell.text = cellText;
}

Hope this helps!

update: This is quite an old answer, and many lines in this answer may be deprecated.