问为什么swiftUI给我正确的代码错误？

EN

import SwiftUI

struct JumpToBookView: View {
    var body: some View {
        List {
            BookRow(selected: true)
            BookRow(selected: true)
            BookRow(selected: true)
            BookRow(selected: true)
            BookRow(selected: true)
            BookRow(selected: true)
        }
    }
    
    func testJump()
    {
        print("test")
    }
}

struct BookRow: View {
    var selected: Bool
    var body: some View {
        ZStack {
            Rectangle()
                .fill(Color(RaiseColor.red))
            HStack{
                Text("1.2 What is an Ecosystem?")
                    .font(.title)
                    .fontWeight(.bold)
                    .foregroundColor(Color(.white))
                Spacer()
                Image(selected ? "pauseButton" : "playButton")
                    .resizable()
                    .aspectRatio(1, contentMode: .fit)
                    .frame(maxWidth: 25)
                    .foregroundColor(Color(.white))
            }
            .padding(.all)
        }
    }
}


struct JumpToBookView_Previews: PreviewProvider {
    static var previews: some View {
        JumpToBookView()
    }
}