// TextView - multiline textarea input
struct TextView: UIViewRepresentable {
    @Binding var text: String
    @State var textStyle: UIFont.TextStyle = UIFont.TextStyle.body
 
    func makeUIView(context: Context) -> UITextView {
        let textView = UITextView()
 
        textView.font = UIFont.preferredFont(forTextStyle: textStyle)
        textView.autocapitalizationType = .sentences
        textView.isSelectable = true
        textView.isUserInteractionEnabled = true
        textView.delegate = context.coordinator
 
        return textView
    }
 
    func updateUIView(_ uiView: UITextView, context: Context) {
        uiView.text = text
        uiView.font = UIFont.preferredFont(forTextStyle: textStyle)
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator($text)
    }
     
    class Coordinator: NSObject, UITextViewDelegate {
        var text: Binding<String>
     
        init(_ text: Binding<String>) {
            self.text = text
        }
     
        func textViewDidChange(_ textView: UITextView) {
            self.text.wrappedValue = textView.text
        }
    }
}

// This is a container view showing how to render TextView.
struct TextContainerView: View {
    // Define local variable which will be changed from textarea.
    @State var description: String = "Hello World"

    var body: some View {
        VStack(alignment: .leading) {
            // Pass description variable as bound variable to update it in parent view from within
            // the child textarea view.
            TextView(text: $description)
                // By default textarea won't have any markings - add padding to it and draw rounded
                // rectange as overlay to display textarea as available field in the form.
                .padding(5)
                .overlay(
                    RoundedRectangle(cornerRadius: 5)
                        .stroke(Color(UIColor.systemGray5), lineWidth: 1)
                )
        }
    }
}