无法从 Sendable 闭包中引用主参与者隔离属性“xxx”

Question

升级到 Swift 6 后，我的照片应用程序出现问题。在下面的示例中，我收到此错误（无法从 Sendable 闭包引用主要参与者隔离属性“photoImage”）。有谁知道如何解决这个问题？在启动时将其分配给 .task 中的不同值也不起作用。

import SwiftUI
import PhotosUI

@Observable
final class CameraModel {
    var thumbnail: String?
}

struct ContentView: View {
    @State var camera = CameraModel()
    @State var selectedItems: [PhotosPickerItem] = []
    var body: some View {
        PhotosPicker(selection: $selectedItems, photoLibrary: .shared()) {
           // I’m getting an error here
            photoImage
        }
    }
    
    
    @ViewBuilder
    private var photoImage: some View {
        if let thumbnail = camera.thumbnail {
            Image(thumbnail)
                .resizable()
                .aspectRatio(contentMode: .fill)
                .animation(.easeInOut(duration: 0.3), value: thumbnail)
        } else {
            Image(systemName: "photo.on.rectangle")
        }
    }
}

#Preview {
    ContentView(camera: CameraModel())
}

Answer 1

只需将您的

photoImage

标记为

nonisolated

struct ContentView: View {
    //@State var camera = CameraModel()
    @State var selectedItems: [PhotosPickerItem] = []
    var body: some View {
        PhotosPicker(selection: $selectedItems, photoLibrary: .shared(), label: {
            photoImage
        })
    }
    
    
    @ViewBuilder
    nonisolated private var photoImage: some View { //<- mark here
        ...
    }
}