mastodon-ios/Mastodon/Vender/UIViewPreview.swift

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2021-02-22 09:20:44 +01:00
// https://github.com/bielikb/UIViewPreview/blob/master/Sources/UIViewPreview/UIViewPreview.swift
#if canImport(SwiftUI) && DEBUG
import SwiftUI
public struct UIViewPreview<View: UIView>: UIViewRepresentable {
public let view: View
public let width: CGFloat?
public init(width: CGFloat? = nil, _ builder: @escaping () -> View) {
self.view = builder()
self.width = width
}
// MARK: - UIViewRepresentable
public func makeUIView(context: Context) -> UIView {
return view
}
public func updateUIView(_ view: UIView, context: Context) {
view.translatesAutoresizingMaskIntoConstraints = false
view.setContentHuggingPriority(.defaultHigh, for: .horizontal)
view.setContentHuggingPriority(.defaultHigh, for: .vertical)
if let width = width {
NSLayoutConstraint.activate([
view.widthAnchor.constraint(equalToConstant: width),
])
}
}
}
public struct UIViewControllerPreview<ViewController: UIViewController>: UIViewControllerRepresentable {
public let viewController: ViewController
public init(_ builder: @escaping () -> ViewController) {
viewController = builder()
}
// MARK: - UIViewControllerRepresentable
public func makeUIViewController(context: Context) -> ViewController {
viewController
}
@available(iOS 13.0, tvOS 13.0, *)
@available(OSX, unavailable)
@available(watchOS, unavailable)
public func updateUIViewController(_ uiViewController: ViewController, context: UIViewControllerRepresentableContext<UIViewControllerPreview<ViewController>>) {
return
}
}
#endif