The dome of the UIView in SWIFT

func roundCorners(corners:UIRectCorner, radius: CGFloat) {
 let path = UIBezierPath(roundedRect: self.bounds,
 byRoundingCorners: corners,
 cornerRadii: CGSize(width: radius, height: radius))
 let maskLayer = CAShapeLayer( )
 maskLayer.frame = self.bounds
 maskLayer.path = path.cgPath
 self.layer.mask = maskLayer
 }

extension UIView {

 func roundCorners(_ corners: UIRectCorner, radius: CGFloat ) {
 if #available(iOS 11.0, *) {
 clipsToBounds = true
 layer.cornerRadius = radius
 layer.maskedCorners = CACornerMask(rawValue: corners.rawValue)
} else {
 let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
 let mask = CAShapeLayer()
 mask .path = path.cgPath
 layer.mask = mask
 }
 }
}

I am trying to use the following

func roundCorners(corners:UIRectCorner, radius: CGFloat) {
 let path = UIBezierPath(roundedRect: self.bounds, 
 byRoundingCorners: corners,
 cornerRadii: CGSize(width: radius, height: radius))
 let maskLayer = CAShapeLayer()
 maskLayer.frame = self.bounds
 maskLayer.path = path.cgPath
 self.layer.mask = maskLayer
 }

Use myView.roundCorners(corner:[.topLeft,.topRight],radius:radius)

< p>But it is revolving around the viewpoint:

This is in the tableView sectionHeader, if I scroll down and then round up using the same code:

The top discount view also uses the same function for rounding.

Thanks for the help.

Update
If I fix the view on Width, then it works fine.

iOS 11 introduces maskedCorners, which can get smoother and better quality results. You can still call the function Use UIRectCorner and convert it to CACornerMask:

Swift 4.2:

extension UIView {

 func roundCorners( _ corners: UIRectCorner, radius: CGFloat) {
 i f #available(iOS 11.0, *) {
 clipsToBounds = true
 layer.cornerRadius = radius
 layer.maskedCorners = CACornerMask(rawValue: corners.rawValue)
} else {< br /> let path = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
 let mask = CAShapeLayer()
 mask.path = path.cgPath 
 layer.mask = mask
 }
 }
}