swift how to change the header color
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let returnedView = UIView(frame: CGRectMake(x, y, width, height)) //set these values as necessary
returnedView.backgroundColor = UIColor.lightGrayColor()
let label = UILabel(frame: CGRectMake(labelX, labelY, labelWidth, labelHeight))
label.text = self.sectionHeaderTitleArray[section]
returnedView.addSubview(label)
return returnedView
}