Why does pull to refresh is not working on scrollview

Question

While pulling down to refresh, the controller target method is not being called.

Why is this issue happening?

  override func viewDidLoad() {
        super.viewDidLoad()
       
        
        scrollview.alwaysBounceVertical = true
        scrollview.bounces  = true
        refreshControl = UIRefreshControl()
        refreshControl.addTarget(self, action: #selector(didPullToRefresh), for: .valueChanged)
        self.scrollview.addSubview(refreshControl)
        
    }

    @objc func didPullToRefresh() {

      print("Refersh")

      // For End refrshing
      refreshControl.endRefreshing()


    }

Answer 1

iOS 10 > UIScrollView has a refreshControl property. This refreshControl will appear when you create a UIRefereshControl and assign it to this property. No need to add UIRefereshControl as a subview for scroll.

func configureRefreshControl () {
   // Add the refresh control to your UIScrollView object.
   myScrollingView.refreshControl = UIRefreshControl()
   myScrollingView.refreshControl?.addTarget(self, action:
                                      #selector(handleRefreshControl),
                                      for: .valueChanged)
}
    
@objc func handleRefreshControl() {
   // Update your content…

   // Dismiss the refresh control.
   DispatchQueue.main.async {
      self.myScrollingView.refreshControl?.endRefreshing()
   }
}