"Type '[view]' cannot conform to 'View'" 使用 NavigationLink() 时出错

Question

我有一个使用 SwiftUI 构建的简单 Apple Watch 应用程序。我正在尝试使用 NavigationLink

添加一个按钮以从我的 ContentView 转到我的 SettingsView

struct ContentView: View {
    
    @EnvironmentObject var settings: SettingsObject
    @EnvironmentObject var chilly: ChillyObject
    
    var body: some View {
        ZStack{
            VStack{

                Text(chilly.message)
                    .foregroundColor(chilly.textColor)
                    .font(.largeTitle)
                    .fontWeight(.heavy)
                    .multilineTextAlignment(.center).fixedSize(horizontal: false, vertical: true)
                    .padding(.top, 9.0)
                            
                Text(chilly.emoji)
                    .font(.largeTitle).foregroundColor(Color.black)
                    .multilineTextAlignment(.center)
                    .padding(.bottom, -20.0)
                
                NavigationLink(destination: SettingsView) {
                    Text("⚙️ Settings")
                        .font(.body)
                        .fontWeight(.semibold)
                }
                .frame(width: 120.0)

            }
        }
    }
}

struct SettingsView: View {
    
    @EnvironmentObject var settings: SettingsObject
            
    var body: some View {
        ZStack {
            VStack {
                Text("Threshold Temp: \(Int(settings.thresholdTemperature))° \(settings.thresholdUnits)")
                    .fontWeight(.light)
                
                Slider(value: $settings.thresholdTemperature, in: 30...90, step: 1)
                    .padding([.leading, .bottom, .trailing])
                
            }
        }
    }
}

我在 ContentView.

这一行收到此错误：Type 'SettingsView.Type' cannot conform to 'View'; only struct/enum/class types can conform to protocols：NavigationLink(destination: SettingsView) {

我认为它是在我按照教程开始尝试使用 @EnvironmentObject 包装器而不是 @ObservedObject 包装器时引入的，但老实说我不能确定。任何见解都会很棒。谢谢！

Answer 1

您正在为目标参数传递 SettingsView 类型，您应该传递一个实例。修改为：

NavigationLink(destination: SettingsView)

收件人：

NavigationLink(destination: SettingsView())

"Type '[view]' cannot conform to 'View'" 使用 NavigationLink() 时出错

"Type '[view]' cannot conform to 'View'" error when using NavigationLink()

swift

swiftui

watchkit

watchos