Question

I have a grouped UITableView.

I am overriding the table row height, but I would like the first row to have a dynamic height that is based on the size of the height of the Label in my cell. How can I get this height?

{
    CGFloat rowHeight = 0;

    if(indexPath.section == kBioSection) {
        switch(indexPath.row) {
            case kBioSectionDescriptionRow:                 
                rowHeight = 100;
                break;
            case kBioSectionLocationRow:                    
                rowHeight = 44;
                break;
            case kBioSectionWebsiteRow:                 
                rowHeight = 44;
                break;
        }
    }
    else {
        rowHeight = 44;
    }

    return rowHeight;
}

Answer 1

NSString has a method called

- (CGSize)sizeWithFont:(UIFont *)font forWidth:(CGFloat)width lineBreakMode:(UILineBreakMode)lineBreakMode;

declared in UIStringDrawing.h

It will give you the size required to draw that string.

You can get the height of that required size, and add whatever else you want, like other labels/views, and space between them, to calculate the final height.

Something like this:

{
    CGFloat rowHeight = 0;

    if(indexPath.section == kBioSection) {
        switch(indexPath.row) {
            case kBioSectionDescriptionRow:                 
                CGSize labelSize = [descriptionText sizeWithFont:labelFont forWidth:tableView.frame.size.width - 20 lineBreakMode:UILineBreakModeWordWrap]; //Assuming 10 px on each side of the label
                rowHeight = labelSize + 50; //Assuming there are 50 px of extra space on the label, besides the text
                break;
            case kBioSectionLocationRow:                    
                rowHeight = 44;
                break;
            case kBioSectionWebsiteRow:                 
                rowHeight = 44;
                break;
        }
    }
    else {
        rowHeight = 44;
    }

    return rowHeight;
}