How to change cell height dynamically in UITableView static cell

Question

I am using UITableViewController instead detailView to show one entity details. I populated one row of data from PFQuery in my viewDidLoad method.

Answer 1

If you are using autolayout. Add top, left and right constrain in to your label.

Then in heightForRowAtIndexPath create your cell

static NSString *simpleTableIdentifier = @"DetailsDesecriptionCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

Set values to label and calculate size of the label after setting the value

    [cell layoutIfNeeded];
    return cell.label.frame.origin.y+cell.label.frame.size.height;

This will give you the exact hight of the label and your cell height will be same

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *simpleTableIdentifier = @"DetailsDesecriptionCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
            cell.titleLabel.text=@"YOUR TEXT";
            [cell layoutIfNeeded];
            return cell.titleLabel.frame.origin.y+cell.titleLabel.frame.size.height;
}

Answer 2

If it is IOS 8 OR 9, there is a simple fix.

1. Set up the constrains for the UILabel. (top, left, bottom, right)
2. Set lines of the UILabel to 0
3. Add the following code in the viewDidLoad method of the ViewController:

tableView.estimatedRowHeight = 68.0
tableView.rowHeight = UITableViewAutomaticDimension

4. override the function:

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

Answer 3

I have been doing trying to achieve this from many days but could not. I tried Fahim answer and got clue, following I got from other different answer and have been able to complete it. Code in I added following function to get exact size of my label

-(CGFloat)getLabelHeightForText:(NSString *)text andWidth:(CGFloat)labelWidth
{

    CGSize maximumSize = CGSizeMake(labelWidth, 10000);
    NSLog(@"crossing getLabelheightForText");

    //provide appropriate font and font size
    CGSize labelHeighSize = [text sizeWithFont: [UIFont fontWithName:@"Trebuchet MS" size:17.0f]
                             constrainedToSize:maximumSize
                                 lineBreakMode:NSLineBreakByTruncatingTail];
    return labelHeighSize.height;
}

Than I have added indexPath with all cell sizes to be returned showing here only one cell size.

    -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    switch (indexPath.section)
    {
        case 0:
        {
            if (indexPath.row == 0)  // category name size
                return 44.0;   
            if (indexPath.row == 1)  // image size
                return 204;
        }
        default:
            return 44.0       
    }
}

But after this I was getting perfect size of label but still have more to do as I was using PFQuery and tableView indexPath runs first that is why it could not update my table and I was still not able to resize cell. Than here is magic line that reloads my tableView and resolve my issue

[self.tableView reloadData];

Although issue is simple but it has a lot things so I put as reply to help other peoples.

Answer 4

Below is how I do.

// this will set height of the row
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
   String *yourLongString = "Long text here";
   UILabel *mLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,0,320,30)];
                                                                   your size will change here
   mLabel.hidden = YES;
   mLabel.text = yourLongString;
   [mLabel sizeToFit];
           ^^^^^^^^ this is very important

   return mLabel.frame.size.height;
}

Now in cellForRowAtIndexPath adjust the height of actual label as per the height of the cell.

Let me know if you are not clear.