functableView(_tableView:UITableView, willDisplay cell:UITableViewCell, forRowAt indexPath:IndexPath) {
letsection = indexPath.section
ifsection !=0{
return
}
letcornerRadius:CGFloat=4.0
cell.backgroundColor = UIColor.clear
letlayer =CAShapeLayer()
letbackgroundLayer =CAShapeLayer()
letpathRef =CGMutablePath()
letbounds = cell.bounds
letnumberOfRows =self.tableView.numberOfRows(inSection: indexPath.section)
varneedSeparator =false
if(indexPath.row==0&& numberOfRows ==1) {
pathRef.addRoundedRect(in: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
}elseif(indexPath.row==0) {
pathRef.move(to:CGPoint(x: bounds.minX, y: bounds.maxY))
pathRef.addArc(tangent1End:CGPoint(x: bounds.minX, y: bounds.minY), tangent2End:CGPoint(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
pathRef.addArc(tangent1End:CGPoint(x: bounds.maxX, y: bounds.minY), tangent2End:CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to:CGPoint(x: bounds.maxX, y: bounds.maxY))
needSeparator =true;
}elseifindexPath.row== (numberOfRows-1) {
pathRef.move(to:CGPoint(x: bounds.minX, y: bounds.minY))
pathRef.addArc(tangent1End:CGPoint(x: bounds.minX, y: bounds.maxY), tangent2End:CGPoint(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
pathRef.addArc(tangent1End:CGPoint(x: bounds.maxX, y: bounds.maxY), tangent2End:CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to:CGPoint(x: bounds.maxX, y: bounds.minY))
}else{
pathRef.addRect(bounds)
needSeparator =true
}
layer.path= pathRef
backgroundLayer.path= pathRef
layer.fillColor = UIColor.white.cgColor
if(needSeparator) {
letlineLayer =CALayer()
letlineHeight = (1.0/UIScreen.main.scale)
lineLayer.frame=CGRect(x: bounds.minX+16, y: bounds.size.height-lineHeight, width: bounds.size.width-10, height: lineHeight)
lineLayer.backgroundColor = self.tableView.separatorColor?.cgColor
layer.addSublayer(lineLayer)
}
letroundView =UIView(frame: bounds)
roundView.layer.insertSublayer(layer, at:0)
roundView.backgroundColor = UIColor.clear
cell.backgroundView= roundView
}
}
