在列表中显示具有获取的对象值的数组

如何解决在列表中显示具有获取的对象值的数组

import SwiftUI
import Parse

struct drankItem: Decodable,Hashable {
    var productItem: String?
    }

var arrayOfdrank = [drankItem]()

struct ContentView: View {
    init() {getDrank()}
    var body: some View {
        
        NavigationView{
            List(arrayOfdrank,id:\.self) { drankItem in
                Text(drankItem.productItem!)
            }
        }
        .navigationBarTitle(Text("Menu"))
        .navigationBarColor(backgroundColor: .systemPink,tintColor: .white)
    }
}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

extension View {
  func navigationBarColor(backgroundColor: UIColor,tintColor: UIColor) -> some View {
    self.modifier(NavigationBarColor(backgroundColor: backgroundColor,tintColor: tintColor))
  }
}

func getDrank() -> [drankItem] {
    var query = PFQuery(className:"Producten")
    query.whereKey("productCategory",equalTo:"Drank")
    query.findobjectsInBackground(block: { (objects,error) -> Void in
        
        if (error == nil) {
            //No error
            if let returnedobjects = objects {
                for object in returnedobjects {
                    
                    let productItem = object["productItem"] as! String
                    //arrayOfdrank.append(productItem)
                    
                    var singleData = drankItem()
                    singleData.productItem = productItem
                    arrayOfdrank.append(singleData)
                    
                    
                    //print(object["productItem"] as! String)
                }
                print(arrayOfdrank)
        }
    }
})
    return(arrayOfdrank)
}

我没有收到任何错误，但是我从 back4app 解析的不同产品的数组只是不想加载到列表视图中。如果我检查终端并打印 arrayOf Drank，我会得到以下图片。出了什么问题？The image displays the terminal when launched