Adjust height UITableViewCell after cellForRowAtIndexPath - objective-c

Question

I can't set the height of my UITableViewCell according to my constrains.
I have in each cell on my UITableView a UILabel where the height is not fixed and depends of the height of this UILabel.
I tried to set the frame on the cell after I update the label's content but nothing happens. Please find my code below:
//On my controller
- (UITableViewCell *)tableView:(UITableView *)tView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"CommentCell";
CommentCell *commentCell = [tView dequeueReusableCellWithIdentifier:CellIdentifier];
if (commentCell == nil) {
commentCell = [[CommentCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
Comment *comment;
if (commentsArray.count > indexPath.row) {
comment = [commentsArray objectAtIndex:indexPath.row];
}
[commentCell setComment:comment];
[commentCell setCommonFields];
currentCellheight = commentCell.contentLabel.frame.size.height + 40;
DDLogInfo(#"Current Cell Height: %f", currentCellheight);
return commentCell;
}
//On my custom Cell (CommentCell.m)
-(void)setCommonFields {
if (self.comment != nil) {
self.contentLabel.text = self.comment.content;
self.contentLabel.numberOfLines = 0;
CGSize maximumLabelSize = CGSizeMake(self.contentLabel.frame.size.width, FLT_MAX);
CGRect expectedLabelRect = [self.contentLabel.text boundingRectWithSize:maximumLabelSize options:NSStringDrawingUsesLineFragmentOrigin attributes:nil context:nil];
CGRect newFrame = self.contentLabel.frame;
newFrame.size.height = expectedLabelRect.size.height;
self.contentLabel.frame = newFrame;
}
}
I tried also to set the height thanks to the heightForRowAtIndexPath method but this method is called before cellForRowAtIndexPath where my label is updated.
I don't have much more idea to solve this problem.
Thank you in advance.

Answer 1

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"indexPath.row :%ld",(long)indexPath.row);
CGSize contsize={260.00f,3000.00f};
UIFont *font=[UIFont fontWithName:#"Helvetica-Bold" size:15.0];
NSString *strt11=#"hellllllooooooooooooooooooo hellllllooooooooooooooooooo hellllllooooooooooooooooooo";
CGSize fontSize=[strt11 sizeWithFont:font constrainedToSize:contsize lineBreakMode:NSLineBreakByWordWrapping];
NSLog(#"fontSize indexPath :%f",fontSize.height);
if (fontSize.height>22)
return fontSize.height+50.0f;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:#"reuse"];
if(cell==nil)
{
cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"reuse"];
UILabel *lblcomment=[[UILabel alloc] initWithFrame:CGRectMake(55,23, 160,20)];
[lblcomment setBackgroundColor:[UIColor clearColor]];
[lblcomment setTag:72];
[lblcomment setTextColor:[UIColor grayColor]];
[lblcomment setNumberOfLines:0];
[lblcomment setFont:[UIFont fontWithName:#"Helvetica" size:15.0]];
[lblcomment setText:#"Its rude day on goin...Its rude day on goin...Its rude day on goin..."];
[cell addSubview:lblcomment];
}
UILabel *lblcomment=(UILabel *)[cell viewWithTag:72];
CGSize contsize={260.00f,3000.00f};
UIFont *font=[UIFont fontWithName:#"Helvetica-Bold" size:15.0];
NSString *strt11=#"hellllllooooooooooooooooooo hellllllooooooooooooooooooo hellllllooooooooooooooooooo";
CGSize fontSize=[strt11 sizeWithFont:font constrainedToSize:contsize lineBreakMode:NSLineBreakByWordWrapping];
float h=20;
NSLog(#"re %f",fontSize.height);
if (fontSize.height>22.0f){
h=fontSize.height+7.0;
NSLog(#"heigtaaaaa %f",h);
}
[lblcomment setFrame:CGRectMake(55,23,260,h)];
NSString *strDecodeComment=#""hellllllooooooooooooooooooo hellllllooooooooooooooooooo hellllllooooooooooooooooooo";
[lblcomment setText:strDecodeComment];
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
return cell;
}

Answer 2

Thanks to Rohit's answer, please find my working code:
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *content=((Comment *)[commentsArray objectAtIndex:indexPath.row]).content;
CGSize maximumLabelSize = CGSizeMake(234.00f, FLT_MAX);
CGRect expectedLabelRect = [content boundingRectWithSize:maximumLabelSize options:NSStringDrawingUsesLineFragmentOrigin attributes:nil context:nil];
if (expectedLabelRect.size.height > 41) {
return expectedLabelRect.size.height + 81;
}
else
return 81;
}