您需要传递guitar数组，而不是Guitars中的类型List。这就是为什么您会收到该错误。

尽管命名不好，但是单数形式使用了复数形式，而复数形式使用了单数形式。这可能会导致混乱，最好对所描述的内容使用适当的术语。

例如，您的Guitars结构仅描述了一把吉他，因此应将其真正重命名为Guitar。类似地，吉他阵列的名称为guitar，因为它是吉他阵列，所以没有意义，因此它应该确实是复数形式，并命名为guitars。

理想情况下，您应该有这样的东西；注意，我使用了更合适的命名约定。

struct Guitar: Identifiable,Hashable {
    let id: Int
    let name,description,imageName: String
}

// defining guitars like this,outside of a class or struct,makes it a global variable.
let guitars: [Guitar] = [
     .init (id: 1,name: "Classical",description: "This is a nylon string guitar that is acoustic and made if cedar or spruce wood",imageName: "classical"),.init (id: 2,name: "Acoustic",description: "The acoustic guitar is a steel string instrument that is traditionally played as an accompanying part of a musical performance.",imageName: "acoustic"),.init (id: 3,name: "Electric",description: "This is a steel string guitar that is electic with pickups and made to be played through amplifiers",imageName: "electric_guitar-1"),.init (id: 4,name: "Banjo",description: "This is a steel string guitar that has five strings.  It's usually played in country and bluegrass music",imageName: "banjo"),.init (id: 5,name: "Bass",description: "This is a steel string guitar that has four strings.  It's usually played in all types of bands and provides the bass line for the music",imageName: "bass")
]

然后您的GuitarDetail应该与此类似：

struct GuitarDetail: View {

    var selectedGuitar: Guitar // notice it is no longer plural,as that didn't make sense

    var body: some View {
        VStack{
            Image(selectedGuitar.imageName) // make sure you use the image name
            .resizable()
            .frame(width:300,height: 300)
            VStack {
                Spacer()

            }
        }
    }
}

最后是您的ContentView

struct ContentView: View {
    var body: some View {
        NavigationView {
            // as you have defined guitars above as a global variable you should be able to access it like this
            List (guitars) { guitar in
                NavigationLink(destination: GuitarDetail(selectedGuitar: guitar) {
                    Text(guitar.name) // you need something inside your NavigationLink for it to work
           }
        }
    }
}