從父ViewController更改嵌入的TableViewController的數據

Question

我試圖讓用戶按頂部的名稱之一。當他們這樣做時，子TableViewController將更改布爾值currentUserIsLoggedInUser。

在我FactsController我的代碼：

class FactsController: UIViewController { 

    @IBOutlet weak var currentUserName: UIButton! 
    @IBOutlet weak var friendUserName: UIButton! 

    var currentPersonSelectedIsCurrentUser: Bool = false 

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     if (segue.identifier == "ChangePersonSegue") { 

      let embed: FactsTableViewController = segue.destinationViewController as! FactsTableViewController 
      embed.currentPersonSelectedIsCurrentUser = self.currentPersonSelectedIsCurrentUser 
      embed.refresh //this doesn't call the function like id want it to 
     } 
    } 

    func changeFactList() { 
     //segue for table view controller for ___ 
     // call prepareForSegue 
     performSegueWithIdentifier("ChangePersonSegue", sender: self) 
    } 

    override func viewDidLoad() { 
     //changethings(user) 
    } 

    @IBAction func tappedUserName (sender: UIButton) { 
     if currentPersonSelectedIsCurrentUser { 

     } 
     else { 
      currentPersonSelectedIsCurrentUser = true 
      changeFactList() 
      currentUserName.titleLabel?.textColor = UIColor.lightGrayColor() 
      friendUserName.titleLabel?.textColor = UIColor.darkGrayColor() 
     } 
    } 

    @IBAction func tappedFriendName (sender: UIButton) { 
     if currentPersonSelectedIsCurrentUser { 
      currentPersonSelectedIsCurrentUser = false 
      changeFactList() 
      // change text color 
      currentUserName.titleLabel?.textColor = UIColor.darkGrayColor() 
      friendUserName.titleLabel?.textColor = UIColor.lightGrayColor() 
     } 
     else { 

     } 
    } 
} 

我 FactsTableViewController

然後我的代碼：

class FactsTableViewController: UITableViewController { 

    let cellID = "factCell" 

    var currentUserIsLoggedInUser: Bool = false 

    //var currentUserName: String = "" 
    var facts = [Fact]() 
    var currentUser: User! 
    var soUser: User! 

    let ref: FIRDatabaseReference = FIRDatabase.database().reference() 

    override func viewDidLoad() { 
     if currentUserIsLoggedInUser { 
      // make tableview for the current user 
     } 
     else { 
      // make tableview for the friend   
     } 
    } 

    func refresh() { 
     self.tableView.reloadData() 
    } 

} 

如果有一種方法只是從FactsController發一個按鈕被按下時的布爾值，這會使一切變得更容易。

Answer 1

如果你想：

辦法剛剛從FactsController發送一個布爾值當按鈕被按下

，那麼你需要一個代表。儘管如此，故事板並沒有給你太多的控制權。我會將你的用戶界面移動到nib文件中，並且手動添加FactsTableViewController作爲子VC。擁有這些類的實例，您可以更輕鬆地管理代表。