@State not updating when set via .init([...]) parameter

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1

Hi,

it seems that a @State variable in a View will not update (initialize to the new value) on subsequent calls to the Views .init method.

In the example below (tested on macOS) the Text("internal: \(_internalNumber)") still shows 41, even after 1s is over and number was set to 42 (in the .task).

TestView.init runs as expected and _internalNumber shows the correct value there, but in the body method (on the redraw) _internalNumber still has the old value.

This is not how it should be, right?

import SwiftUI

struct ContentView: View {
  @State private var number = 41

  var body: some View {
    VStack {
      TestView(number: number)
        .fixedSize()
    }
    .task {
      try! await Task.sleep(nanoseconds: 1_000_000_000)
      await MainActor.run {
        print("adjusting")
        number = 42
      }
    }
  }
}

////////////////////////

// MARK: - TestView -

public struct TestView: View {
  public init(number: Int) {
    self.number = number
    
    __internalNumber = .init(initialValue: number)

    print("Init number: \(self.number)")
    print("Init _internalNumber: \(_internalNumber)")
  }
  
  var number: Int
  @State private var _internalNumber: Int

  public var body: some View {
    VStack(alignment: .leading) {
      Text("number: \(number)")
      Text("internal: \(_internalNumber)")
    }
    .debugAction {
      Self._printChanges()
      print("number: \(number)")
      print("_internalNumber: \(_internalNumber)")
    }
  }
}


// MARK: - debugAction

extension View {
  func debugAction(_ closure: () -> Void) -> Self {
    closure()
    return self
  }
}