UITableViewCell with dynamic height iOS

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?

Solution 1:

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):

Solution 2:

The following code worked fine for me.Try with this

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

    CGFloat lRetval = 10;
    CGSize maximumLabelSize = CGSizeMake(231, FLT_MAX);
    CGSize expectedLabelSize;


    CGFloat numberoflines = [thirdcellText length]/17.0;

    if (indexPath.section == 0) {
        expectedLabelSize = [firstcellText sizeWithFont:[UIFont systemFontOfSize:16.0]
                                      constrainedToSize:maximumLabelSize
                                          lineBreakMode:NSLineBreakByWordWrapping];
        lRetval = expectedLabelSize.height;
    }
    else if(indexPath.section == 1)
    {
        expectedLabelSize = [secondcellText sizeWithFont:[UIFont systemFontOfSize:16.0]
                                       constrainedToSize:maximumLabelSize
                                           lineBreakMode:NSLineBreakByWordWrapping];
        lRetval = expectedLabelSize.height;
    }
    else if (indexPath.section == 2)
    {
        expectedLabelSize = [thirdcellText sizeWithFont:[UIFont systemFontOfSize:16.0]
                                       constrainedToSize:CGSizeMake(231, numberoflines*17.0)
                                           lineBreakMode:NSLineBreakByWordWrapping];
        lRetval = expectedLabelSize.height-128.0;
    }

    UIImage *factoryImage = [UIImage imageNamed:NSLocalizedString(@"barcode_factory_reset.png", @"")];

    CGFloat height = factoryImage.size.height;

    if (lRetval < height) {
        lRetval = height+15.0;
    }

    return lRetval;
}

Try to add the following code in your customcell class autolayout method

textview.frame = frame;
CGRect frame1 = textview.frame;
frame1.size.height = textview.contentSize.height-2;
textview.frame = frame1;


textview.contentSize = CGSizeMake(textview.frame.size.width, textview.frame.size.height);

labelPtr.frame = CGRectMake(CGRectGetMinX(imageView.frame)+CGRectGetMaxX(imageView.frame)+5.0, textview.frame.size.height+10.0, 140, 16.0);
[labelPtr setNeedsDisplayInRect:labelPtr.frame];

Try to set the label properties like the following

labelPtr = [[UILabel alloc] initWithFrame:CGRectZero];
labelPtr.backgroundColor =[UIColor clearColor];
[labelPtr setNeedsLayout];
[labelPtr setNeedsDisplay];
[self.contentView addSubview:labelPtr];

Solution 3:

A'm looking for a long time how to determinate cell height properly, - looks like - it's a best solution, boundingRectWithSize and constrainedToSize often incorrectly calculated text height, you need to create UILabel than use sizeThatFits function, see below

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

    UILabel  * label = [[UILabel alloc] initWithFrame:CGRectMake(8, 5, celllabelWidth, 9999)];
    label.numberOfLines=0;
    label.font = [UIFont fontWithName:fontName size:textSize];
    label.text = @"celllabelTextHere";

    CGSize maximumLabelSize = CGSizeMake(celllabelWidth, 9999);
    CGSize expectedSize = [label sizeThatFits:maximumLabelSize];
    return expectedSize.height;
}