77 lines
2.8 KiB
Swift
77 lines
2.8 KiB
Swift
import SwiftUI
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import UIKit
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struct RefreshableScrollView<Content: View>: UIViewRepresentable {
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var content: Content
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var onRefresh: () -> Void
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var onScroll: ((CGPoint) -> Void)?
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var isRefreshing: Binding<Bool>
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init(isRefreshing: Binding<Bool>, onRefresh: @escaping () -> Void, onScroll: ((CGPoint) -> Void)? = nil, @ViewBuilder content: () -> Content) {
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self.content = content()
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self.onRefresh = onRefresh
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self.onScroll = onScroll
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self.isRefreshing = isRefreshing
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}
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func makeUIView(context: Context) -> UIScrollView {
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let scrollView = UIScrollView()
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scrollView.delaysContentTouches = false
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scrollView.delegate = context.coordinator
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let refreshControl = UIRefreshControl()
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refreshControl.addTarget(context.coordinator, action: #selector(Coordinator.handleRefresh), for: .valueChanged)
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scrollView.refreshControl = refreshControl
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let hostingController = UIHostingController(rootView: content)
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hostingController.view.backgroundColor = .clear
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hostingController.view.translatesAutoresizingMaskIntoConstraints = false
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scrollView.addSubview(hostingController.view)
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NSLayoutConstraint.activate([
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hostingController.view.leadingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.leadingAnchor),
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hostingController.view.trailingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.trailingAnchor),
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hostingController.view.topAnchor.constraint(equalTo: scrollView.contentLayoutGuide.topAnchor),
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hostingController.view.bottomAnchor.constraint(equalTo: scrollView.contentLayoutGuide.bottomAnchor),
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hostingController.view.widthAnchor.constraint(equalTo: scrollView.frameLayoutGuide.widthAnchor)
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])
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context.coordinator.hostingController = hostingController
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return scrollView
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}
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func updateUIView(_ uiView: UIScrollView, context: Context) {
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if isRefreshing.wrappedValue {
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uiView.refreshControl?.beginRefreshing()
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} else {
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DispatchQueue.main.async {
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uiView.refreshControl?.endRefreshing()
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}
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}
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context.coordinator.hostingController?.rootView = content
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}
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func makeCoordinator() -> Coordinator {
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Coordinator(self)
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}
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class Coordinator: NSObject, UIScrollViewDelegate {
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var parent: RefreshableScrollView
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var hostingController: UIHostingController<Content>?
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init(_ parent: RefreshableScrollView) {
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self.parent = parent
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}
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@objc func handleRefresh() {
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parent.onRefresh()
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}
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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parent.onScroll?(scrollView.contentOffset)
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}
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}
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}
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