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POResize tableview NSLayoutConstraint
 

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    <p>Hi I have a tableView which I change the width programmatically by his constraint:</p> <pre><code> self.widthTableLeft.constant = self.view.frame.size.width; </code></pre> <p>I do this in the viewDidLoad. </p> <p>In the delegate method:</p> <pre><code>- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath </code></pre> <p>I need the contentview frame of each cell to calculate the hight of the cell, but when get it, this is the old size, I mean the size if I wouldn't have done the resize.</p> <p>When the table is showed the size of the table is right but the hight of the cell is wrong. </p> <p>I have tried to call:</p> <pre><code>[cell setNeedsUpdateConstraints]; [cell updateConstraintsIfNeeded]; [cell.contentView setNeedsLayout]; [cell.contentView layoutIfNeeded]; </code></pre> <p>The question is, before to show the view of my view controller, when is the best place to update the width constraint of a UITableView and to get the right contentView in the cells in the method heightForRowAtIndexPath.</p> <p>Sorry but I'm lost, could you give me any ideas?</p> <p>Thanksssss</p> <p><strong>UPDATE</strong></p> <p>This is the code in heightForRowAtIndexPath</p> <pre><code>static const NSInteger ROC_TITLE_LABEL_TAG = 2; - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { ROCAgendaItemDetailEntity *agendaItemDetail = [self.listRight objectAtIndex:indexPath.row]; UITableViewCell *cell = [self.tableLeft dequeueReusableCellWithIdentifier:@"cellVideo"]; //I get the label which will make the cell bigger UILabel *titleLabel = (UILabel *)[cell viewWithTag:ROC_TITLE_LABEL_TAG]; //We init the height title with the min height. float extraSpaceHeightLabel = 0; if (agendaItemDetail.agendaItem.title.length &gt; 0) { //I will use his width to get the hight that I need to write all text float width = titleLabel.frame.size.width; CGSize size = CGSizeMake(width, CGFLOAT_MAX); //we get the size CGSize sizeTitleLabel = [agendaItemDetail.agendaItem.title sizeWithFont:[ROCTextsInformation imagoMed:15] constrainedToSize:size lineBreakMode:titleLabel.lineBreakMode]; //we substract the current height of the label to know the extra space to write all text sizeTitleLabel.height -= titleLabel.frame.size.height; extraSpaceHeightLabel = sizeTitleLabel.height; } //The final hight will be the contenViewHeight pluss the extra space needed. return cell.contentView.frame.size.height + extraSpaceHeightLabel; } </code></pre> <p>and this is the cell in the table view</p> <p><img src="https://i.stack.imgur.com/pxQ7O.png" alt="enter image description here"></p> <p>Thanks again</p>
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