Run refresh programmatically

[Luur]

Hello,

Thank you for great lib.
I would like to have opportunity to run refresh programmatically from .onAppear { } block. Could you please prompt me how to achieve it?

[J0ker98]

I think you can achieve that by setting the pullToRefresh "isShowing" binding var to true on the .onAppear code block

Something like this:

struct ContentView: View {

    @State var isRefreshing: Bool = false
    var body: some View {

        List { ... }
            .pullToRefresh(isShowing: $isRefreshing) { ... }

        Text("Refresh me")
            .onAppear() {
                self.isRefreshing = true
            }
    }
}

[Luur]

Thank you for your response. You are right, "isShowing" binding var should be set to true on the .onAppear code block. But it's not enough. You also need to modify func updateUIView.

func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext<PullToRefreshRepresentation>) {
        
        DispatchQueue.main.asyncAfter(deadline: .now()) {
            
            guard let parentView = self.parentView(entry: uiView) else { return }
            
            if let refreshControl = parentView.refreshControl {
                if self.isShowing {
                    **if !refreshControl.isRefreshing {
                        parentView.setContentOffset(CGPoint(x: 0, y: parentView.contentOffset.y - refreshControl.frame.size.height), animated: true)
                    }**
                    refreshControl.beginRefreshing()
                } else {
                    refreshControl.endRefreshing()
                }
                return
            }
            
            let refreshControl = UIRefreshControl()
            refreshControl.addTarget(context.coordinator, action: #selector(Coordinator.onValueChanged), for: .valueChanged)
            parentView.refreshControl = refreshControl
        }
    }

Only after that it works as needed in my case.

[bart-kneepkens]

Should @Luur's changes go into a PR to master? Seems to me that this is a rather common use case.