Switching OS runtime in Xcode Preview for SwiftUI runtime differences

Updated
Aug 18, 2022 1:19 PM
Created
Aug 9, 2022 12:43 PM
Tags
SwiftUI.framework
Attributes
image
image

It’s just switching target iPhone Simulator. Xcode uses current active scheme including os version to display SwiftUI preview.

import SwiftUI
/**
 For Xcode Preview, indicates current using iOS runtime version.
 */
public struct RuntimeIndicator: View {
  
  @Environment(\.colorScheme) private var colorScheme
  
  public init() {
    
  }
  
  public var body: some View {
    
    HStack {
      Text("iOS")
      Text(UIDevice.current.systemVersion)
    }
    .font(.system(size: 18, weight: .black, design: .monospaced))
    .foregroundColor({
      switch colorScheme {
      case .light:
        return Color(white: 0.2)
      case .dark:
        return Color(white: 0.8)
      @unknown default:
        return Color(white: 0.2)
      }
    }())
    .padding(.horizontal, 9)
    .padding(.vertical, 6)
    .background(
      RoundedRectangle(cornerRadius: 4, style: .continuous)
        .fill(Color(white: 0.5, opacity: 0.2))
    )
  }
}

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