如何在SwiftUI TextField中将光标移动到末尾？

TextField("Placeholder", text: $text)
    .onAppear {
        DispatchQueue.main.async {
            let end = text.endIndex
            text.selectedTextRange = text.textRange(from: end, to: end)
        }
    }

struct CustomTextField: UIViewRepresentable {
    @Binding var text: String

    func makeUIView(context: Context) -> UITextField {
        let textField = UITextField()
        textField.delegate = context.coordinator
        return textField
    }

    func updateUIView(_ uiView: UITextField, context: Context) {
        uiView.text = text
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    class Coordinator: NSObject, UITextFieldDelegate {
        var parent: CustomTextField

        init(_ textField: CustomTextField) {
            self.parent = textField
        }

        func textFieldDidChangeSelection(_ textField: UITextField) {
            parent.text = textField.text ?? ""
        }

        func textFieldDidBeginEditing(_ textField: UITextField) {
            let end = textField.endOfDocument
            textField.selectedTextRange = textField.textRange(from: end, to: end)
        }
    }
}

// 使用自定义的TextField
CustomTextField(text: $text)