设置滚动查看的内容动态不起作用

我拼命想弄清楚这一点，我花了整整一天，没有运气。我想要做的是有一个用户可以点击的文本框列表，它会将键盘放在页面上，这样A）该字段不被阻塞，并且（我已经计算出该部分）和B）顶部弹出键盘时视图不会被切断。这是我迄今为止（http://imgur.com/a/LExyo），但你可以清楚地看到问题〜这是我无法向上滚动的视图的顶部。我试图在scrollview中把所有东西都埋掉，然后改变scrollview的内容大小，但是没有做任何事情。任何帮助，将不胜感激。谢谢。（我正在尝试在swift 3中做到这一点）。设置滚动查看的内容动态不起作用

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) 
      } 
     } 
    } 
}

来源

2017-06-23 Peter Weyand

从这里https://stackoverflow.com/questions/28813339/move-a-view-up-only-when可能的复制-the-keyboard-covers-an-input-field如果你遇到问题需要解决，那么你的内容大小/约束布局可能会有些问题。我在这里解决键盘问题，并且滚动到活动的textField。 https://github.com/kingreza/UIScrollViewSample/tree/master –

谢谢Reza，那些是我一直在寻找的机器人。 –

使用插图的内容，而不是内容的大小：

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

来源

2017-06-23 21:29:56

好吧，很酷，这是一个90％的解决方案。我使用这个教程片段来获取它*几乎*工作：https://www.hackingwithswift.com/example-code/uikit/how-to-adjust-a-uiscrollview-to-fit-the-keyboard。现在的问题是，当我用'scrollView.contentInset = UIEdgeInsets.zero'关闭窗口时，我在底部获得了额外的空间。看到这里：http://imgur.com/a/GIHug。我认为零指令应该已经完全消除了键盘空间，但显然不是。 –

@PeterWeyand使用'scrollView.contentOffset'向上和向下移动文本字段，而不是改变视图框架。 –

备份瓦西里·穆拉维约夫回答您的最后一个错误。

步骤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)

步骤2）

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

来源

2017-06-23 22:46:43 facumenzella

设置滚动查看的内容动态不起作用

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