ios - 使用 Firestore 中的数据填充 TableView

Question

我在填充表格 View 时遇到问题。当我运行此代码时，它根本不会填充表格 View 。我确信它正在从 firebase 检索数据。

    var restaurants: [Restaurants] = []

override func viewDidLoad() {
        super.viewDidLoad()

        videos = fetchData()
        configureTableView()
    }

这是我的扩展功能:

extension RestaurantViewController {
    func fetchData() -> [Restaurants]{

        let db = Firestore.firestore()
        db.collection("Restaurants").getDocuments { (snapshot, err) in

            if let err = err {
                print("Error getting documents: \(err)")
                return
            } else {
                for document in snapshot!.documents {

                    let name = document.get("Name") as! String

                    print("Name: ",name)
                    let restaurant1 = Restaurants(title: name)

                    self.restaurants.append(restaurant1)

                }

            }
        }

        return restaurants

    }

我可能错过了一些简单的东西，请帮忙

谢谢!

Answer 1

尝试这样的事情

func fetchData(completion: @escaping (Bool) -> ()){

    let db = Firestore.firestore()
    db.collection("Restaurants").getDocuments { (snapshot, err) in

        if let err = err {
            print("Error getting documents: \(err)")
            completion(false)
        } else {
            for document in snapshot!.documents {

                let name = document.get("Name") as! String

                print("Name: ",name)
                let restaurant1 = Restaurants(title: name)

                self.restaurants.append(restaurant1)

            }

            completion(true)
        }
    }
}

在您看来DidLoad:

fetchData { (done) in

    if done {
        configureTableView()
    } else {
        // Handle this somehow
    }
}