設置滾動查看的內容動態不起作用

我拼命想弄清楚這一點，我花了整整一天，沒有運氣。我想要做的是有一個用戶可以點擊的文本框列表，它會將鍵盤放在頁面上，這樣A）該字段不被阻塞，並且（我已經計算出該部分）和B）頂部彈出鍵盤時視圖不會被切斷。這是我迄今爲止（http://imgur.com/a/LExyo），但你可以清楚地看到問題〜這是我無法向上滾動的視圖的頂部。我試圖在scrollview中把所有東西都埋掉，然後改變scrollview的內容大小，但是沒有做任何事情。任何幫助，將不勝感激。謝謝。（我正在嘗試在swift 3中做到這一點）。設置滾動查看的內容動態不起作用

class ViewController4: UIViewController, UITextFieldDelegate { 

    var dataState: Data? 

    @IBOutlet weak var UserNameLabel: UILabel! 

    @IBOutlet weak var TextField1Outlet: UITextField! 


    @IBOutlet weak var TextField2Outlet: UITextField! 

    @IBOutlet weak var TextField3Outlet: UITextField! 


    @IBOutlet weak var TextField4Outlet: UITextField! 


    @IBOutlet weak var TextField5Outlet: UITextField! 

    @IBOutlet var ViewFrame: UIView! 


    @IBOutlet weak var scrollView: UIScrollView! 


    @IBAction func TextField1Action(_ sender: Any) { 
    } 

    @IBAction func TextField2Action(_ sender: Any) { 
    } 


    @IBAction func TextField3Action(_ sender: Any) { 
    } 


    @IBAction func TextField4Action(_ sender: Any) { 
    } 


    @IBAction func TextField5Action(_ sender: Any) { 
    } 


    override func viewWillAppear(_ animated: Bool) { 
     super.viewWillAppear(animated) 
     UserNameLabel.text = dataState?.LoginName 
    } 

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
     if let destinationViewController = segue.destination as? ViewController1 { 
      destinationViewController.dataState = dataState 
     } 
    } 

    func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
     textField.resignFirstResponder() 
     return true 
    } 

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

    override func viewDidLoad() { 
     super.viewDidLoad() 

     scrollView.contentSize = CGSize(width: self.view.frame.width, height: self.view.frame.height) 
     scrollView.delegate = self as? UIScrollViewDelegate 

     TextField1Outlet.returnKeyType = UIReturnKeyType.done 
     TextField1Outlet.delegate = self 

     TextField2Outlet.returnKeyType = UIReturnKeyType.done 
     TextField2Outlet.delegate = self 

     TextField3Outlet.returnKeyType = UIReturnKeyType.done 
     TextField3Outlet.delegate = self 

     TextField4Outlet.returnKeyType = UIReturnKeyType.done 
     TextField4Outlet.delegate = self 

     TextField5Outlet.returnKeyType = UIReturnKeyType.done 
     TextField5Outlet.delegate = self 

     NotificationCenter.default.addObserver(self, selector: #selector(ViewController4.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil) 
     NotificationCenter.default.addObserver(self, selector: #selector(ViewController4.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil) 
    } 

    func keyboardWillShow(notification: NSNotification) { 
     if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue { 
      if self.view.frame.origin.y == 0{ 
       self.view.frame.origin.y -= keyboardSize.height 
       let newHeight = self.view.frame.height + keyboardSize.height 
       scrollView.contentSize = CGSize(width: self.view.frame.width, height: newHeight) 

      } 
     } 
    } 

    func keyboardWillHide(notification: NSNotification) { 
     if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue { 
      if self.view.frame.origin.y != 0{ 
       self.view.frame.origin.y += keyboardSize.height 
       scrollView.contentSize = CGSize(width: self.view.frame.width, height: self.view.frame.height) 
      } 
     } 
    } 
}

來源

2017-06-23 Peter Weyand

從這裏https://stackoverflow.com/questions/28813339/move-a-view-up-only-when可能的複製-the-keyboard-covers-an-input-field如果你遇到問題需要解決，那麼你的內容大小/約束佈局可能會有些問題。我在這裏解決鍵盤問題，並且滾動到活動的textField。 https://github.com/kingreza/UIScrollViewSample/tree/master –

謝謝Reza，那些是我一直在尋找的機器人。 –

使用插圖的內容，而不是內容的大小：

scrollView.contentInset = UIEdgeInsets(top: 0.0, left: 0.0, bottom: /* keyboard height */, right: 0.0)

來源

2017-06-23 21:29:56

好吧，很酷，這是一個90％的解決方案。我使用這個教程片段來獲取它*幾乎*工作：https://www.hackingwithswift.com/example-code/uikit/how-to-adjust-a-uiscrollview-to-fit-the-keyboard。現在的問題是，當我用'scrollView.contentInset = UIEdgeInsets.zero'關閉窗口時，我在底部獲得了額外的空間。看到這裏：http://imgur.com/a/GIHug。我認爲零指令應該已經完全消除了鍵盤空間，但顯然不是。 –

@PeterWeyand使用'scrollView.contentOffset'向上和向下移動文本字段，而不是改變視圖框架。 –

備份瓦西里·穆拉維約夫回答您的最後一個錯誤。

步驟1）

let insets = scrollView.contentInset 
//Here you should save the PREVIOUS_BOTTOM 
scrollView.contentInset = UIEdgeInsets(top: insets.top, left: insets.left, bottom: /* keyboard height */, right: insets.right)

步驟2）

let inset = scrollViewInset.contentInset 
scrollView.contentInset = UIEdgeInsets(top: inset.top, left: inset.left, bottom: PREVIOUS_BOTTOM, right: inset.right)

來源

2017-06-23 22:46:43 facumenzella

設置滾動查看的內容動態不起作用

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