metatext/Views/UIKit/Content Views/InstanceView.swift

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Swift
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// Copyright © 2021 Metabolist. All rights reserved.
import Kingfisher
import UIKit
final class InstanceView: UIView {
private let imageView = AnimatedImageView()
private let titleLabel = UILabel()
private let uriLabel = UILabel()
private var instanceConfiguration: InstanceContentConfiguration
init(configuration: InstanceContentConfiguration) {
instanceConfiguration = configuration
super.init(frame: .zero)
initialSetup()
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setupAccessibility()
applyInstanceConfiguration()
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
extension InstanceView: UIContentView {
var configuration: UIContentConfiguration {
get { instanceConfiguration }
set {
guard let instanceConfiguration = newValue as? InstanceContentConfiguration else { return }
self.instanceConfiguration = instanceConfiguration
applyInstanceConfiguration()
}
}
}
private extension InstanceView {
func initialSetup() {
let stackView = UIStackView()
addSubview(stackView)
stackView.translatesAutoresizingMaskIntoConstraints = false
stackView.axis = .vertical
stackView.spacing = .defaultSpacing
stackView.addArrangedSubview(imageView)
imageView.layer.cornerRadius = .defaultCornerRadius
imageView.clipsToBounds = true
imageView.contentMode = .scaleAspectFill
stackView.addArrangedSubview(titleLabel)
titleLabel.adjustsFontSizeToFitWidth = true
titleLabel.font = .preferredFont(forTextStyle: .headline)
titleLabel.numberOfLines = 0
titleLabel.textAlignment = .center
stackView.addArrangedSubview(uriLabel)
uriLabel.adjustsFontSizeToFitWidth = true
uriLabel.font = .preferredFont(forTextStyle: .subheadline)
uriLabel.numberOfLines = 0
uriLabel.textAlignment = .center
uriLabel.textColor = .secondaryLabel
NSLayoutConstraint.activate([
stackView.leadingAnchor.constraint(equalTo: readableContentGuide.leadingAnchor),
stackView.topAnchor.constraint(equalTo: readableContentGuide.topAnchor),
stackView.trailingAnchor.constraint(equalTo: readableContentGuide.trailingAnchor),
stackView.bottomAnchor.constraint(equalTo: readableContentGuide.bottomAnchor),
imageView.widthAnchor.constraint(equalTo: imageView.heightAnchor, multiplier: 16 / 9)
])
}
func applyInstanceConfiguration() {
let viewModel = instanceConfiguration.viewModel
imageView.kf.setImage(with: viewModel.instance.thumbnail)
titleLabel.text = viewModel.instance.title
uriLabel.text = viewModel.instance.uri
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accessibilityLabel = viewModel.instance.title.appendingWithSeparator(viewModel.instance.uri)
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}
func setupAccessibility() {
isAccessibilityElement = true
}
}