What is the most efficient way to update SwiftUI DatePicker to allow only the current time and disallow future times?

edit

You can use the .maximumDate() modifier of the DatePicker to set the maximum selectable date to the current date and time. This will prevent the user from selecting a date or time in the future.

Here's an example:

struct ContentView: View {
    @State private var selectedDate = Date()

    var body: some View {
        VStack {
            Text("Select a date and time:")
            DatePicker(
                "",
                selection: $selectedDate,
                displayedComponents: [.date, .hourAndMinute]
            )
            .labelsHidden()
            .maximumDate(Date())
        }
    }
}

In the example above, we're using the .maximumDate(Date()) modifier to set the maximum selectable date to the current date and time. You can customize the format of the displayed date and time components using the displayedComponents parameter.