实时将数据从 AppDelegate 传递到 ViewController (iOS) Swift 2

Question

我想使用 Apple 通知创建聊天，我想在收到通知时将数据传递到我的 Table 视图以更新它我正在尝试做一个示例来测试如何将数据表单应用程序委托传递给 viewController 但它不起作用任何人都可以帮忙吗我的ViewController代码

class ViewController: UIViewController {

  var fileDirectory: String = String()
  let delegate = UIApplication.sharedApplication().delegate as! AppDelegate

  override func viewDidLoad() {
      super.viewDidLoad()
      NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ViewController.refreshView(_:)), name: "refreshView", object: nil)
  }

  func refreshView(notification: NSNotification) {
      fileDirectory = delegate.filePath
      print("tester")
  }

  override func didReceiveMemoryWarning() {
      super.didReceiveMemoryWarning()
  }
}

我想从 appDelegate 访问 refreshView 函数

Answer 1

您在 viewDidLoad() ViewController 中写下一行是正确的

NotificationCenter.default.addObserver(self, selector: #selector(ViewController.refreshView), name: "AnyThingYouWant", object: nil)
}

但是在你想调用ViewController.refreshView方法的appDelegate中添加这一行

NotificationCenter.default.post(name: "AnyThingYouWant", object: self)
}

如果你想在收到通知时调用 refreshView 方法，请在 didReceiveLocal/RemoteNotification 方法

的上面写上一行

实时将数据从 AppDelegate 传递到 ViewController (iOS) Swift 2

Pass data from AppDelegate to ViewController in realTime (iOS) Swift 2

iphone

ios

swift2