UITableViewCell with dynamic height iOS

Question

I have implemented TableView with CustomCell in my app,

I want dynamic height of my UITableViewCell according to text length in UITableViewCell,

here is the snapshot of Customcell

: and here is the snapshot of my UITableView : code snippet for heightForRowAtIndexPath

#define FONT_SIZE 14.0f
#define CELL_CONTENT_WIDTH 320.0f
#define CELL_CONTENT_MARGIN 10.0f

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{
    NSString *text = [DescArr objectAtIndex:[indexPath row]];
    CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
    CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
    CGFloat height = MAX(size.height, 100.0);
    return height; 
}

As you can see in the 2nd image, height for cell is fixed, it doesn't change with it's text (content) size.

Where am I making mistake? How can I make a a label or a cell to update its size according to its contents/text?

Answer 1

To set automatic dimension for row height & estimated row height, ensure following steps to make, auto dimension effective for cell/row height layout.

• Assign and implement tableview dataSource and delegate
• Assign UITableViewAutomaticDimension to rowHeight & estimatedRowHeight
• Implement delegate/dataSource methods (i.e. heightForRowAt and return a value UITableViewAutomaticDimension to it)

-

@IBOutlet weak var table: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Don't forget to set dataSource and delegate for table
    table.dataSource = self
    table.delegate = self

    // Set automatic dimensions for row height
    // Swift 4.2 onwards
    table.rowHeight = UITableView.automaticDimension
    table.estimatedRowHeight = UITableView.automaticDimension


    // Swift 4.1 and below
    table.rowHeight = UITableViewAutomaticDimension
    table.estimatedRowHeight = UITableViewAutomaticDimension

}



// UITableViewAutomaticDimension calculates height of label contents/text
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    // Swift 4.2 onwards
    return UITableView.automaticDimension

    // Swift 4.1 and below
    return UITableViewAutomaticDimension
}

For label instance in UITableviewCell

• Set number of lines = 0 (& line break mode = truncate tail)
• Set all constraints (top, bottom, right left) with respect to its superview/ cell container.
• Optional: Set minimum height for label, if you want minimum vertical area covered by label, even if there is no data.

Answer 2

Please, Look HERE - Dynamic Table View Cell Height and Auto Layout tutorial.

What you need:

• set required constraint on elements in cell (make shure that all done correctly, if no - you can get a lot of problem). Also make shure that you set IntrinsicSize to PlaceHolder value

• add few method for calculating size of cell

Methods:

//this will calculate required height for your cell
-(CGFloat)heightForBasicCellAtIndexPath:(NSIndexPath *)indexPath {
      static UIYourClassCellName *sizingCell = nil;
      //create just once per programm launching
      static dispatch_once_t onceToken;
      dispatch_once(&onceToken, ^{
      sizingCell = [self.tableView dequeueReusableCellWithIdentifier:@"identifierOfCell"];
});
  [self configureBasicCell:sizingCell atIndexPath:indexPath];
  return [self calculateHeightForConfiguredSizingCell:sizingCell];
}
//this method will calculate required height of cell
- (CGFloat)calculateHeightForConfiguredSizingCell:(UITableViewCell *)sizingCell {
      [sizingCell setNeedsLayout];
      [sizingCell layoutIfNeeded];
      CGSize size = [sizingCell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
      return size.height;
}

And call

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
  return [self heightForBasicCellAtIndexPath:indexPath];
}

Configuration of cell

- (void)configureBasicCell:(RWBasicCell *)cell atIndexPath:(NSIndexPath *)indexPath {
    //make some configuration for your cell
}

After all operation i got next (text inside cell only as placeholder):

Answer 3

This is very simple now
Use below steps

1. Set constraint to your Label (If using custom cell)
2. Number of line must be 0
3. Setup few properties of UITableView

self.tableView.estimatedRowHeight = 100.0;
self.tableView.rowHeight = UITableViewAutomaticDimension;

Enjoy:)
For more detail you can check
www.raywenderlich.com
stackoverflow.com

Answer 4

I saw a lot of solutions but all was wrong or uncomplet. You can solve all problems with 5 lines in viewDidLoad and autolayout. This for objetive C:

_tableView.delegate = self;
_tableView.dataSource = self;
self.tableView.estimatedRowHeight = 80;//the estimatedRowHeight but if is more this autoincremented with autolayout
self.tableView.rowHeight = UITableViewAutomaticDimension;
[self.tableView setNeedsLayout];
[self.tableView layoutIfNeeded];
self.tableView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0) ;

For swift 2.0:

 self.tableView.estimatedRowHeight = 80
 self.tableView.rowHeight = UITableViewAutomaticDimension      
 self.tableView.setNeedsLayout()
 self.tableView.layoutIfNeeded()
 self.tableView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0)

Now create your cell with xib or into tableview in your Storyboard With this you no need implement nothing more or override. (Don forget number os lines 0) and the bottom label (constrain) downgrade "Content Hugging Priority -- Vertical to 250"

You can donwload the code in the next url: https://github.com/jposes22/exampleTableCellCustomHeight

References: http://candycode.io/automatically-resizing-uitableviewcells-with-dynamic-text-height-using-auto-layout/