SwiftUI TextField Date Binding - date

Question

Hmmm. I'm not doing very well with these bindings.
struct RecordForm: View
{
#State var record: Record
var body: some View
{
TextField("date", text: Binding($record.recordDate!)))
}
}
I want to convert this Date to a String. In regular Swift I would just call my extension
record.recordDate.mmmyyy()
but I cannot find the right syntax or even the right place to do the conversion.
If I try to put the code in the body or the struct I just get a pile of errors.
Is there any easy to read documentation on this subject?

Answer 1

The answer by nine stones worked nicely, although I had to tweak the code slightly to get it to work for me with an NSManagedObject:
struct RecordDate: View
{
#State var record: Record //NSManagedObject
var body: some View {
let bind = Binding<String>(
get: {self.$record.recordDate.wrappedValue!.dateString()},
set: {self.$record.recordDate.wrappedValue = dateFromString($0)}
)
return HStack {
Text("Date:")
TextField("date", text: bind)
}
}
}
//dateString is a date extension that returns a date as a string
//dateFromString is a function that returns a string from a date

Answer 2

Documentation is hard to find and Apple's really ucks.
Try to create a custom binding.
extension Date {
func mmyyy() -> String { "blah" }
static func yyymm(val: String) -> Date { Date() }
}
struct RecordForm: View {
struct Record {
var recordDate: Date
}
#State var record = Record(recordDate: Date())
var body: some View {
let bind = Binding(
get: { self.record.recordDate.mmyyy() },
set: { self.record.recordDate = Date.yyymm(val: $0)}
)
return VStack {
TextField("date", text: bind)
}
}
}