70 lines
2.3 KiB
Swift
70 lines
2.3 KiB
Swift
// Copyright © 2021 Metabolist. All rights reserved.
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import Combine
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import Kingfisher
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import UIKit
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import ViewModels
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final class SecondaryNavigationButton: UIBarButtonItem {
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private var cancellables = Set<AnyCancellable>()
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init(viewModel: NavigationViewModel, rootViewModel: RootViewModel) {
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super.init()
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let button = UIButton(
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type: .custom,
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primaryAction: UIAction { _ in viewModel.presentingSecondaryNavigation = true })
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let downsampled = KingfisherOptionsInfo.downsampled(
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dimension: .barButtonItemDimension,
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scaleFactor: UIScreen.main.scale)
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button.imageView?.contentMode = .scaleAspectFill
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button.layer.cornerRadius = .barButtonItemDimension / 2
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button.clipsToBounds = true
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customView = button
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NSLayoutConstraint.activate([
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button.widthAnchor.constraint(equalToConstant: .barButtonItemDimension),
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button.heightAnchor.constraint(equalToConstant: .barButtonItemDimension)
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])
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viewModel.identityContext.$identity.sink {
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button.kf.setImage(
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with: $0.image,
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for: .normal,
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placeholder: UIImage(systemName: "line.horizontal.3"),
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options: downsampled)
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}
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.store(in: &cancellables)
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viewModel.$recentIdentities.sink { identities in
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button.menu = UIMenu(children: identities.map { identity in
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UIDeferredMenuElement { completion in
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let action = UIAction(title: identity.handle) { _ in
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rootViewModel.identitySelected(id: identity.id)
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}
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if let image = identity.image {
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KingfisherManager.shared.retrieveImage(with: image, options: downsampled) {
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if case let .success(value) = $0 {
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action.image = value.image
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}
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completion([action])
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}
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} else {
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completion([action])
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}
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}
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})
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}
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.store(in: &cancellables)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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}
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