title: Circle in SwiftUI doesn't show in my iPhone
body: <p>I have two <code>Circle</code>s to show a circle progress bar, one of these is the progress the another one is the background, but the progress circle doesn't show in my iPhone. This is my code:</p>
  <pre><code>struct ProgressBarView: View {
  
  @Environment(\.colorScheme) var colorScheme: ColorScheme
      
  var body: some View {
          ZStack {
              
              Group {
                  
                  Circle()
                      .stroke(lineWidth: 14.0)
                      .opacity(colorScheme == .dark ? 1 : 0.3)
                  
                  Circle()
                      .trim(from: 0.0, to: 0.3 )
                      .stroke(style: StrokeStyle(lineWidth: 14.0, lineCap: .round, lineJoin: .round))
                      .foregroundColor(colorScheme == .dark ? .blue : Color(&quot;DarkBlue&quot;))
                      .rotationEffect(Angle(degrees: 270.0))
                  
                  Text(&quot;16hrs&quot;)
                      .font(.system(size: 22))
                      .fontWeight(.regular)
              }//: Group
              .foregroundColor(colorScheme == .dark ? .white : Color(&quot;DarkBlue&quot;))
  
          }
  }}
  </code></pre>
  <p><a href="https://i.stack.imgur.com/xGK5O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xGK5O.png" alt="assets" /></a></p>