redactable-iOS-14.swift

// Original article here: https://www.fivestars.blog/code/redacted-custom-effects.html

import SwiftUI

extension RedactionReasons {
  public static let confidential = RedactionReasons(rawValue: 1 << 10)
}

struct ContentView: View {
  var body: some View {
    VStack {
      Text("Hello world")

      Text("Hello world")
        .redactable()
        .redacted(reason: .confidential)
    }
    .font(.title)
  }
}

extension View {
  func redactable() -> some View {
    self
      .modifier(Redactable())
  }
}

struct Redactable: ViewModifier {
  @Environment(\.redactionReasons) private var reasons

  @ViewBuilder
  func body(content: Content) -> some View {
    if reasons.contains(.confidential) {
      content
        .accessibility(label: Text("Confidential"))
        .overlay(Color.black)
    } else {
      content
    }
  }
}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
      .padding()
      .previewLayout(.sizeThatFits)
  }
}