在 SwiftUI 中为 DatePicker 设置默认日期? [英] Set default date on DatePicker in SwiftUI?

问题描述

我在 VStack 中有这个 DatePicker，工作正常:

I have this DatePicker inside a VStack, working fine:

VStack {
    DatePicker(selection: $birthDate, displayedComponents: .date) {
                Text("")
            }.padding(10)
            .labelsHidden()
            .datePickerStyle(WheelDatePickerStyle())
}

我希望能够将默认日期设置为过去 40 年，这样用户就不必旋转到目前为止的年份(大多数人不是新生儿).这可以通过 DatePicker 完成，如this SO answer所示.我不知道如何在 SwiftUI 中实现它.感谢您的帮助.

I'd like to be able to have the default date set to 40 years in the past so the user doesn't have to spin the year so far (most people aren't newborns). This can be done with DatePicker as shown in this SO answer. I don't know how to implement that in SwiftUI. Thanks for any help.

推荐答案

为什么不只是这样?

struct ContentView: View {
    @State private var birthDate: Date = Calendar.current.date(byAdding: DateComponents(year: -40), to: Date()) ?? Date()

    var body: some View {
        VStack {
            DatePicker(selection: $birthDate, displayedComponents: .date) {
                Text("")
            }
            .padding(10)
            .labelsHidden()
            .datePickerStyle(WheelDatePickerStyle())
        }
    }
}

这篇关于在 SwiftUI 中为 DatePicker 设置默认日期?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！