SwiftUI -@Binding:来自DatePickerView的字符串

struct ParentView: View {
    @State private var selectedDate = Date()
    @State private var dateString = ""
    
    var body: some View {
        VStack {
            Text("Selected Date: \(dateString)")
            
            DatePickerView(selectedDate: $selectedDate, dateString: $dateString)
        }
    }
}

struct DatePickerView: View {
    @Binding var selectedDate: Date
    @Binding var dateString: String
    
    var body: some View {
        VStack {
            DatePicker("Select a date", selection: $selectedDate, displayedComponents: .date)
                .labelsHidden()
            
            Button("Convert to String") {
                let formatter = DateFormatter()
                formatter.dateStyle = .long
                dateString = formatter.string(from: selectedDate)
            }
        }
    }
}