Swift UIScrollView focus on specific subview

UIScrollViewExtension.swift

extension UIScrollView {
  
  func scroll(toSubview view: UIView, animated: Bool = true) {
    guard view.isDescendant(of: self) else { return }
    let visibleRect = CGRect(origin: contentOffset,
                             size: frame.size)
    let realRect = view.convert(view.frame, to: self
                                
    //View is out of scroll visible area
    if !visibleRect.contains(realRect) || realRect.maxY <= 0 {
      let yPos = realRect.maxY - visibleRect.height
      setContentOffset(CGPoint(x: 0, y: yPos), animated: animated)
    }
  }
}