SwiftUI TextEditor Placeholder with NotificationCenter

TextEditorPlaceholderWithNoti.swift

struct ContentView: View {
    @State var text = "Placeholder"
    
    var body: some View {

        TextEditor(text: self.$text)
            .foregroundColor(self.text == "Placeholder" ? .gray : .primary)
            .onAppear {

                NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { (noti) in
                    withAnimation {
                        if self.text == "Placeholder" {
                            self.text = ""
                        }
                    }
                }
                
                NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: .main) { (noti) in
                    withAnimation {
                        if self.text == "" {
                            self.text = "Placeholder"
                        }
                    }
                }
            }
    }
}