How to set cell height based on UILabel inside custom cell - ios

Question

I have used UITableView to display items from database and I have created custom UITableViewCell which has a few labels. My largest label is name Description.
Each cell can have different height but I can't figure out how to set dynamic cell height.
All I get is three dots at the end of the label and height for cell is always about 50.
How to make cell height based on label inside it?
#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 = _orderProperty.Description;
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE]
constrainedToSize:constraint
lineBreakMode:NSLineBreakByWordWrapping];
CGFloat height = MAX(size.height, 44.0f);
return height + (CELL_CONTENT_MARGIN * 2);
}
UPDATE
static NSString *CellIdentifier = #"orderDetailCell";
OrderDetailCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil){
[tableView registerNib:[UINib nibWithNibName:#"OrderDetailCustomCell" bundle:nil] forCellReuseIdentifier:CellIdentifier];
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
}
OrderProperty* item = [_list objectAtIndex:indexPath.row];
cell.Title.text = item.Title;
NSString* _description = item.Description;
cell.Description.text = _description;

Answer 1

You can try something like this
- (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
int rowHeight =0.0f;
NSString *stringToSize=[NSString stringWithFormat:#"%#",longStringValue];
CGSize size = [stringToSize
sizeWithFont:[UIFont systemFontOfSize:15.0f]
constrainedToSize:CGSizeMake(300, 6000)
lineBreakMode:NSLineBreakByWordWrapping];
rowHeight = size.height+10;
return rowHeight;
}
you may get the longStringValue from the array that you are using as a dataSource for your table

Answer 2

You can use following category on NSString, which use NSTextContainer and NSTextContainer to calculate the exact size of your text.
NSString+Calculation.m
And your final code will be like this:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *text = _orderProperty.Description;
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize size = [text usedSizeForMaxWidth:constraint.width
withFont:[UIFont systemFontOfSize:FONT_SIZE]];
CGFloat height = MAX(size.height, 44.0f);
return height + (CELL_CONTENT_MARGIN * 2);
}

Answer 3

sizeWithFont is now deprecated, please use the method below to set the height of the sell according the the text within the label.
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
OrderProperty* item = [_list objectAtIndex:indexPath.row];
NSString *text = item.Description;
NSDictionary *stringAttributes = [NSDictionary dictionaryWithObject:[UIFont fontWithName:#"Helvetica" size:13] forKey:NSFontAttributeName];
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize expectedLabelSize = [content boundingRectWithSize: constraint options:NSStringDrawingTruncatesLastVisibleLine|NSStringDrawingUsesLineFragmentOrigin attributes:stringAttributes context:nil].size;
return expectedLabelSize.height+CELL_CONTENT_MARGIN * 2);
}
Obviously you will need to adjust the string attributes to whatever you are using. These are simply for calculating the required height of the cell.