如何通过函数从ParentView中正确地更改子视图的(@状态/@绑定)变量？(不在构造函数中)

import SwiftUI

struct ChildView: View {
    @State private var childVariable: String = "Initial Value"
    var updateChildVariable: (String) -> Void
    
    var body: some View {
        VStack {
            Text(childVariable)
            Button(action: {
                updateChildVariable("New Value")
            }) {
                Text("Update Variable")
            }
        }
    }
}

struct ParentView: View {
    var body: some View {
        VStack {
            Text("Parent View")
            ChildView(updateChildVariable: updateChildVariable(_:))
        }
    }
    
    func updateChildVariable(_ newValue: String) {
        // Perform any necessary operations
        // to update the childVariable
        // e.g. making a network request, updating a database, etc.
        childVariable = newValue
    }
}

struct ContentView: View {
    var body: some View {
        ParentView()
    }
}