FB9627501.md

FB9627501

In previous betas of Xcode 13 a purple runtime warning would appear when using the alert/confirmationDialog APIs incorrectly. For example, this:

struct ContentView: View {
  var body: some View {
    Text("Hi")
      .alert(
        "Alert",
        isPresented: .constant(true),
        presenting: Int?.none,
        actions: { _ in 
          Button("Ok") { }
        }
      )
  }
}

Would show a warning:

🟣 Attempting to present an alert without any data. The data parameter must be non-nil when isPresented is true.

But now no warning appears and so it can be confusing why the alert/confirmationDialog is presented with invalid data.