在“NavigationLink”上引用初始化程序“init(destination:label:)”

Question

我正在尝试创建List，但出现如下代码错误。

struct BookView: View {

    var books : [BookModel] = []
    var body: some View {

        NavigationView {
            List(self.books, id: \.self) { book in
                NavigationLink(destination: Text(book.title ?? "Unknown Title")) {
                    BooksRow(book: book)
                }
            }
        }
    }
}

struct BookModel: Hashable {
    var title: String?
    var author: String?
}

struct BooksRow {

    let book : BookModel
    var body: some View {

        VStack {
            Text(book.title ?? "Unknown Title")
                .font(.headline)
            Text(book.author ?? "Unknown Author")
                .foregroundColor(.secondary)
        }
    }
}

错误：在“NavigationLink”上引用初始化程序“init(destination:label:)”要求“BooksRow”符合“View”

Answer 1

这里是修复

struct BooksRow: View { // << here !!

    let book : BookModel
    var body: some View {

    // ... your other code

Answer 2

struct BooksRow: View { // Now it conforms to View-Protocol

        let book : BookModel
        var body: some View {

            VStack {
                Text(book.title ?? "Unknown Title")
                    .font(.headline)
                Text(book.author ?? "Unknown Author")
                    .foregroundColor(.secondary)
            }
        }
    }