85 lines
2.2 KiB
Swift
85 lines
2.2 KiB
Swift
import SwiftUI
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#if os(iOS)
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public extension View {
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func customAlert<Content: View>(
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isPresented: Binding<Bool>,
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@ViewBuilder content: @escaping () -> Content
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) -> some View {
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background(
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CustomAlert(
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show: isPresented,
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content: content
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)
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)
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}
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}
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private final class CustomAlertWrapper<Content: View>: UIViewController, UIPopoverPresentationControllerDelegate {
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var content: () -> Content
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var onDismiss: (() -> Void)?
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private var hostVC: UIHostingController<Content>?
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@available(*, unavailable)
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required init?(coder _: NSCoder) { fatalError("") }
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init(content: @escaping () -> Content) {
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self.content = content
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super.init(nibName: nil, bundle: nil)
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}
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func show() {
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guard hostVC == nil else { return }
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let controller = UIHostingController(rootView: content())
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controller.view.sizeToFit()
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controller.modalPresentationStyle = .overFullScreen
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controller.modalTransitionStyle = .crossDissolve
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controller.view.backgroundColor = UIColor(white: 0, alpha: 0.4)
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controller.presentationController?.delegate = self
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hostVC = controller
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present(controller, animated: true, completion: nil)
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}
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func hide() {
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guard let controller = hostVC, !controller.isBeingDismissed else { return }
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dismiss(animated: true, completion: nil)
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hostVC = nil
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}
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func presentationControllerWillDismiss(_: UIPresentationController) {
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hostVC = nil
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onDismiss?()
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}
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}
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private struct CustomAlert<Content: View>: UIViewControllerRepresentable {
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@Binding var show: Bool
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let content: () -> Content
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func makeUIViewController(
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context _: UIViewControllerRepresentableContext<CustomAlert<Content>>
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) -> CustomAlertWrapper<Content> {
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let controller = CustomAlertWrapper(content: content)
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controller.onDismiss = { self.show = false }
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return controller
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}
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func updateUIViewController(
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_ uiViewController: CustomAlertWrapper<Content>,
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context _: UIViewControllerRepresentableContext<CustomAlert<Content>>
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) {
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if show {
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uiViewController.show()
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} else {
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uiViewController.hide()
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}
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}
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}
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#endif
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