swiftui-PersonNameComponents（）不能用变量初始化

Question

我正在使用Xcode版本12.0.1(12A7300)

我从Apple下载了这段代码，用来测试使用PersonNameComponents制作字母组合。

https://developer.apple.com/documentation/foundation/formatter/display_human-friendly_content

我用Xcode做了一个新项目，从苹果的代码中重做monogram.swift。

我的问题是:我不能在我的项目中用变量初始化PersonNameComponents，但它在Apple的项目中工作得很好。即使我复制类并将其粘贴到我的项目中，也会得到错误。

编译器错误:“参数传递给不带参数的调用。”编译程序错误屏幕截图

struct Monogram_Previews: PreviewProvider {
static var previews: some View {
    VStack {
        let sampleName = PersonNameComponents(familyName: "मिश्र", givenName: "करन")
        Monogram(nameComponents: sampleName, color: .orange)
            .padding(.bottom, 20)
        Monogram(nameComponents: sampleName, color: .blue, sideLength: 100)
            .padding(.bottom, 20)
        Monogram(nameComponents: sampleName, color: .pink, sideLength: 250)
    }
}

}

谢了。

Answer 1

错误很明显，PersonNameComponentsFormatter没有不带参数的初始值设定项。您可能忘记在项目中包含namesview.swift文件中提供的自定义init:

extension PersonNameComponents {
    init(namePrefix: String? = nil,
         familyName: String? = nil,
         middleName: String? = nil,
         givenName: String? = nil,
         nameSuffix: String? = nil,
         nickname: String? = nil,
         phoneticRepresentation: PersonNameComponents? = nil) {
        self.init()
        self.namePrefix = namePrefix
        self.familyName = familyName
        self.middleName = middleName
        self.givenName = givenName
        self.nameSuffix = nameSuffix
        self.nickname = nickname
        self.phoneticRepresentation = phoneticRepresentation
    }
}