SwiftUI拖放:在validateDrop中访问被拖动的项目

struct ContentView: View {
    @State private var droppedItem: String? = nil
    
    var body: some View {
        VStack {
            Text("Drop Here")
                .font(.title)
                .padding()
                .background(Color.gray)
                .onDrop(of: ["public.text"], isTargeted: nil) { (items) -> Bool in
                    if let item = items.first {
                        if let provider = item.itemProvider {
                            provider.loadItem(forTypeIdentifier: "public.text", options: nil) { (data, error) in
                                if let text = data as? String {
                                    self.droppedItem = text
                                }
                            }
                        }
                    }
                    return true
                }
            
            if let droppedItem = droppedItem {
                Text("Dropped Item: \(droppedItem)")
                    .font(.title)
                    .padding()
            }
        }
    }
}