arrays - 某些数据更改后如何刷新 TableView？

Question

我只想更改一个名为 Network 的类中的用户列表。而且我不明白如何在 userList 更改后更新 TableView。我将在下面的代码中向您展示一个示例和详细问题。

// Network.swift
class Network {
    var userList: [User] = []

    // Next functions may change userList array
    // For example, the data came from the server, and update the userList with new data
}

// App delegate
class AppDelegate: UIResponder, UIApplicationDelegate {
    var network: Network = Network()

    ..
}

// File TableViewController.swift
class TableViewController: UITableViewController {
    …
    var userList: [User] = [] // Here I want to have a full copy of the array from Network class

    override func viewDidLoad() {
        super.viewDidLoad()

        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        self.userList = appDelegate.network.userList // Just copy an array
        // And I want that after each update appDelegate.network.userList I updated the table, how to do it better?

        self.tableView.reloadData()
    }  
}

Answer 1

正如@JDM 在评论中提到的，您的架构一团糟。
尝试使用协议(protocol)进行此委托(delegate):

// Network.swift
protocol UsersUpdatedProtocol {
  func usersListUpdated(list: [User])
}
class Network {
  var userList: [User] = [] {
    didSet {
      delegate?.usersListUpdated(list: userList)
    }
  }
  var delegate: UsersUpdatedProtocol?
  init(delegate d: UsersUpdatedProtocol) {
    super.init()
    delegate = d
  }
}

// File TableViewController.swift
class TableViewController: UITableViewController, UsersUpdatedProtocol {
  var userList: [User] = []

  override func viewDidLoad() {
    super.viewDidLoad()
    let _ = Network(delegate: self)
  }
  func usersListUpdated(list: [User]) {
    self.userList = list
    self.tableView.reloadData()
  }
}