Dynamic UITableView Cell Height Based on Contents

Question

I have a UITableView that is populated with custom cells (inherited from UITableViewCell), each cell contains a UIWebView that is auto

Answer 1

Here is code that I used for dynamic cell height when fetching tweets from twitter and then storing them in CoreData for offline reading.

Not only does this show how to get the cell and data content, but also how to dynamically size a UILabel to the content with padding

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

    Tweet *tweet = [self.fetchedResultsController objectAtIndexPath:indexPath];

    NSString* text = tweet.Text;

    TweetTableViewCell *cell = (TweetTableViewCell*)[self tableView:tableView cellForRowAtIndexPath:indexPath];

    //Set the maximum size
    CGSize maximumLabelSize = cell.tweetLabel.frame.size;
    CGPoint originalLocation = cell.tweetLabel.frame.origin;

    //Calculate the new size based on the text
    CGSize expectedLabelSize = [text sizeWithFont:cell.tweetLabel.font constrainedToSize:maximumLabelSize lineBreakMode:cell.tweetLabel.lineBreakMode];


    //Dynamically figure out the padding for the cell
    CGFloat topPadding = cell.tweetLabel.frame.origin.y - cell.frame.origin.y;


    CGFloat bottomOfLabel = cell.tweetLabel.frame.origin.y + cell.tweetLabel.frame.size.height;
    CGFloat bottomPadding = cell.frame.size.height - bottomOfLabel;


    CGFloat padding = topPadding + bottomPadding;


    CGFloat topPaddingForImage = cell.profileImage.frame.origin.y - cell.frame.origin.y;
    CGFloat minimumHeight = cell.profileImage.frame.size.height + topPaddingForImage + bottomPadding;

    //adjust to the new size
    cell.tweetLabel.frame = CGRectMake(originalLocation.x, originalLocation.y, cell.tweetLabel.frame.size.width, expectedLabelSize.height);


    CGFloat cellHeight = expectedLabelSize.height + padding;

    if (cellHeight < minimumHeight) {

        cellHeight = minimumHeight;
    }

    return cellHeight;
}