SwiftUI自定义DatePicker日期标签格式

import SwiftUI

struct ContentView: View {
    @State private var selectedDate = Date()
    
    var body: some View {
        VStack {
            DatePicker(
                "选择日期",
                selection: $selectedDate,
                displayedComponents: .date
            )
            .datePickerStyle(GraphicalDatePickerStyle())
            .labelsHidden()
            .onAppear {
                let formatter = DateFormatter()
                formatter.dateFormat = "yyyy年MM月dd日"
                UIDatePicker.appearance().preferredDatePickerStyle = .wheels
                UIDatePicker.appearance().locale = Locale(identifier: "zh_CN")
                UIDatePicker.appearance().calendar = Calendar(identifier: .chinese)
                UIDatePicker.appearance().datePickerMode = .date
                UIDatePicker.appearance().minimumDate = formatter.date(from: "1900年01月01日")
                UIDatePicker.appearance().maximumDate = Date()
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}