Setting Row Height in a TableView with Dynamic Content

開發小筆記

set text, font, constrain size and line break mode in advance

then check the size of the text

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cellText = @"Go get some text for your cell.";
    UIFont *cellFont = [UIFont systemFontOfSize:23];
    CGSize constraintSize = CGSizeMake(280.0f, MAXFLOAT);
    CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];

    return labelSize.height + 20;
}