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ios - Calculate UITableViewCell height to fit string

I have a NSMutableArray, which could contain several hundreds of different strings. Each string is user defined and could have any length, yet no more than an average paragraph.

I need to find out how many lines each string could take. So, I could calculate the required height for a every UITableviewCell.

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Use the following code to calculate and to set the height for cell:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Define `veryverySmallTitleFont`
    // Define `descLabel`

    NSString *ourText = @"Your string data from array";
    UIFont *font = [UIFont fontWithName:@"Verdana" size:veryverySmallTitleFont];
    font = [font fontWithSize:veryverySmallTitleFont];

    CGSize constraintSize = CGSizeMake(descLabel.frame.size.width, 1000);
    CGSize labelSize = [ourText sizeWithFont:font
                           constrainedToSize:constraintSize
                               lineBreakMode:UILineBreakModeWordWrap];

    return labelSize.height;
}

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