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Ios 在常规UIViewController上的UITableViewCell中，滚动键盘上方的UITextField

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Ios 在常规UIViewController上的UITableViewCell中，滚动键盘上方的UITextField,ios,ios4,Ios,Ios4,我已经在StackOverflow上尝试了这里的大多数示例。我也用了苹果的。我似乎有一个问题，他们没有考虑UITableView中的UITextField。我已经做过很多次了，但不是这样。我有一个自定义的UITableViewCell，其中有一个UITextField 在我的UITableView（不是UITableViewController）上，我需要能够避免将UITextField隐藏在UITableView下 到目前为止，我有： -(void)viewDidLoad { ....

我已经在StackOverflow上尝试了这里的大多数示例。我也用了苹果的。我似乎有一个问题，他们没有考虑UITableView中的UITextField。我已经做过很多次了，但不是这样。我有一个自定义的UITableViewCell，其中有一个UITextField

在我的UITableView（不是UITableViewController）上，我需要能够避免将UITextField隐藏在UITableView下

到目前为止，我有：

-(void)viewDidLoad
{
....
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];

....
}

- (void)scrollToRectOfTextField {
    UITableViewCell *cell = (UITableViewCell*)[self.activeTextField superview];
    CGRect r = CGRectMake(self.activeTextField.frame.origin.x,
                          cell.frame.origin.y+self.activeTextField.frame.origin.y,
                          self.activeTextField.frame.size.width,
                          self.activeTextField.frame.size.height);
    [self.tableView scrollRectToVisible:r animated:YES];
}

- (void)keyboardDidShow:(NSNotification *)notification
{
    if (UI_USER_INTERFACE_IDIOM()== UIUserInterfaceIdiomPhone) {
        NSDictionary *userInfo = [notification userInfo];
        CGSize size = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
        NSLog(@"TableView: %@", NSStringFromCGRect(self.tableView.frame));
        CGRect newTableViewFrame = CGRectMake(self.tableView.frame.origin.x,
                                              self.tableView.frame.origin.y,
                                              self.tableView.frame.size.width, self.tableView.frame.size.height - size.height);
        self.tableView.frame = newTableViewFrame;
        NSLog(@"New TableView: %@", NSStringFromCGRect(self.tableView.frame));


        self.tableView.contentSize = CGSizeMake(self.tableView.contentSize.width, self.tableView.contentSize.height-size.height);
    }
}


- (void)keyboardWillHide:(NSNotification *)notification
{
    NSDictionary *userInfo = [notification userInfo];
    CGSize size = [[userInfo objectForKey: UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    self.tableView.frame = CGRectMake(self.tableView.frame.origin.x,
                                      self.tableView.frame.origin.y,
                                      self.tableView.frame.size.width,
                                      self.tableView.frame.size.height + size.height);

    NSLog(@"%@", NSStringFromCGRect(self.tableView.frame));
}


-(void)textFieldDidBeginEditing
{
     [self scrollToRectOfTextField];
}
这似乎把一堆空白推过了我的键盘。还请注意，我的UITextField上也有一个inputAccessoryView

哦，我不能使用任何第三方类。我喜欢TPKeyboardAvoidingScrollView，但我不能使用任何第三方的东西。

我花了一整天的时间试图解决这个问题。我把它贴在这里，然后找到了一个博客链接和一个非常简单的解决方案。看起来是这样的：

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    CGPoint pointInTable = [textField.superview convertPoint:textField.frame.origin toView:self.tableView];
    CGPoint contentOffset = self.tableView.contentOffset;

    contentOffset.y = (pointInTable.y - textField.inputAccessoryView.frame.size.height);

    NSLog(@"contentOffset is: %@", NSStringFromCGPoint(contentOffset));

    [self.tableView setContentOffset:contentOffset animated:YES];

    return YES;
}


-(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    [textField resignFirstResponder];

    if ([textField.superview.superview isKindOfClass:[UITableViewCell class]])
    {
        UITableViewCell *cell = (UITableViewCell*)textField.superview.superview;
        NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];

        [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionMiddle animated:TRUE];
    }

    return YES;
}

我花了一整天的时间想弄明白这一点。我把它贴在这里，然后找到了一个博客链接和一个非常简单的解决方案。看起来是这样的：

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    CGPoint pointInTable = [textField.superview convertPoint:textField.frame.origin toView:self.tableView];
    CGPoint contentOffset = self.tableView.contentOffset;

    contentOffset.y = (pointInTable.y - textField.inputAccessoryView.frame.size.height);

    NSLog(@"contentOffset is: %@", NSStringFromCGPoint(contentOffset));

    [self.tableView setContentOffset:contentOffset animated:YES];

    return YES;
}


-(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    [textField resignFirstResponder];

    if ([textField.superview.superview isKindOfClass:[UITableViewCell class]])
    {
        UITableViewCell *cell = (UITableViewCell*)textField.superview.superview;
        NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];

        [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionMiddle animated:TRUE];
    }

    return YES;
}

我尝试了@inturbidus为iOS8发布的链接，但不幸的是，它对我不起作用。经过一番挖掘，苹果的网站上确实有一些示例代码，可以像在UITableViewController中一样自然地工作。这是Objective-C版本的苹果链接，我还在这里添加了swift版本

苹果的Objective-C链接（滚动至清单5-1）：

var activeField: UITextField?

func textFieldDidBeginEditing(textField: UITextField) {
    self.activeField = textField
}

func textFieldDidEndEditing(textField: UITextField) {
    self.activeField = nil
}

func registerForKeyboardNotifications() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardDidShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)
}    

func keyboardWasShown(aNotification: NSNotification) {
    let info = aNotification.userInfo as! [String: AnyObject],
    kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
    contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    var aRect = self.view.frame
    aRect.size.height -= kbSize.height

    if !CGRectContainsPoint(aRect, activeField!.frame.origin) {
        self.tableView.scrollRectToVisible(activeField!.frame, animated: true)
    }
}

func keyboardWillBeHidden(aNotification: NSNotification) {
    let contentInsets = UIEdgeInsetsZero
    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets
}
快速适应Objective-C版本

var activeField: UITextField?

func textFieldDidBeginEditing(textField: UITextField) {
    self.activeField = textField
}

func textFieldDidEndEditing(textField: UITextField) {
    self.activeField = nil
}

func registerForKeyboardNotifications() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardDidShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)
}    

func keyboardWasShown(aNotification: NSNotification) {
    let info = aNotification.userInfo as! [String: AnyObject],
    kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
    contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    var aRect = self.view.frame
    aRect.size.height -= kbSize.height

    if !CGRectContainsPoint(aRect, activeField!.frame.origin) {
        self.tableView.scrollRectToVisible(activeField!.frame, animated: true)
    }
}

func keyboardWillBeHidden(aNotification: NSNotification) {
    let contentInsets = UIEdgeInsetsZero
    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets
}
我尝试了@inturbidus为iOS8发布的链接，但不幸的是，它对我不起作用。经过一番挖掘，苹果的网站上确实有一些示例代码，可以像在UITableViewController中一样自然地工作。这是Objective-C版本的苹果链接，我还在这里添加了swift版本

苹果的Objective-C链接（滚动至清单5-1）：

var activeField: UITextField?

func textFieldDidBeginEditing(textField: UITextField) {
    self.activeField = textField
}

func textFieldDidEndEditing(textField: UITextField) {
    self.activeField = nil
}

func registerForKeyboardNotifications() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardDidShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)
}    

func keyboardWasShown(aNotification: NSNotification) {
    let info = aNotification.userInfo as! [String: AnyObject],
    kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
    contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    var aRect = self.view.frame
    aRect.size.height -= kbSize.height

    if !CGRectContainsPoint(aRect, activeField!.frame.origin) {
        self.tableView.scrollRectToVisible(activeField!.frame, animated: true)
    }
}

func keyboardWillBeHidden(aNotification: NSNotification) {
    let contentInsets = UIEdgeInsetsZero
    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets
}
快速适应Objective-C版本

var activeField: UITextField?

func textFieldDidBeginEditing(textField: UITextField) {
    self.activeField = textField
}

func textFieldDidEndEditing(textField: UITextField) {
    self.activeField = nil
}

func registerForKeyboardNotifications() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardDidShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)
}    

func keyboardWasShown(aNotification: NSNotification) {
    let info = aNotification.userInfo as! [String: AnyObject],
    kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
    contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    var aRect = self.view.frame
    aRect.size.height -= kbSize.height

    if !CGRectContainsPoint(aRect, activeField!.frame.origin) {
        self.tableView.scrollRectToVisible(activeField!.frame, animated: true)
    }
}

func keyboardWillBeHidden(aNotification: NSNotification) {
    let contentInsets = UIEdgeInsetsZero
    self.tableView.contentInset = contentInsets
    self.tableView.scrollIndicatorInsets = contentInsets
}
感谢@Salman的链接。
请注意，Apple示例用于普通视图中的scrollview。
在表格视图中，您必须将activeField的Point和Rect转换为表格的坐标，因此我更改了函数键盘中的一些行，如图所示：

func keyboardWasShown(aNotification: NSNotification) {
        let info = aNotification.userInfo as! [String: AnyObject],
        kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
        contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

        self.tableBasket.contentInset = contentInsets
        self.tableBasket.scrollIndicatorInsets = contentInsets

        var aRect = self.view.frame
        aRect.size.height -= kbSize.height

        let pointInTable = activeField!.superview!.convertPoint(activeField!.frame.origin, toView: tableView)
        let rectInTable = activeField!.superview!.convertRect(activeField!.frame, toView: tableView)

        if !CGRectContainsPoint(aRect, pointInTable) {
            self.tableView.scrollRectToVisible(rectInTable, animated: true)
        }
}
如果视图中有tabBarController，请记住使用tabBar高度而不是UIEdgeInsetsZero重置contentInsets（如果没有，最后一行可能隐藏在tabBar下）：

感谢@Salman的链接。
请注意，Apple示例用于普通视图中的scrollview。
在表格视图中，您必须将activeField的Point和Rect转换为表格的坐标，因此我更改了函数键盘中的一些行，如图所示：

func keyboardWasShown(aNotification: NSNotification) {
        let info = aNotification.userInfo as! [String: AnyObject],
        kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue().size,
        contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

        self.tableBasket.contentInset = contentInsets
        self.tableBasket.scrollIndicatorInsets = contentInsets

        var aRect = self.view.frame
        aRect.size.height -= kbSize.height

        let pointInTable = activeField!.superview!.convertPoint(activeField!.frame.origin, toView: tableView)
        let rectInTable = activeField!.superview!.convertRect(activeField!.frame, toView: tableView)

        if !CGRectContainsPoint(aRect, pointInTable) {
            self.tableView.scrollRectToVisible(rectInTable, animated: true)
        }
}
如果视图中有tabBarController，请记住使用tabBar高度而不是UIEdgeInsetsZero重置contentInsets（如果没有，最后一行可能隐藏在tabBar下）：

在常规UIViewController swift 3和Xcode 8.1上的UITableViewCell中，滚动键盘上方的UITextField

1） set Delegate=UITextFieldDelegate

  override func viewWillAppear(_ animated: Bool) {

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

   }
      func textFieldDidBeginEditing(_ textField: UITextField) {
          self.activeField = textField
   }
      func textFieldDidEndEditing(_ textField: UITextField) {
        self.activeField = nil
   }


//MARK: - Keyboard Show and Hide Methods
    func keyboardWillShow(notification: NSNotification)
    {
        let info = notification.userInfo! as! [String: AnyObject],
        kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue.size,
        contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

        self.FourthTblMainTableView.contentInset = contentInsets
        self.FourthTblMainTableView.scrollIndicatorInsets = contentInsets

        var aRect = self.FourthTblMainTableView.frame
        aRect.size.height -= kbSize.height
    }
    func keyboardWillHide(notification: NSNotification)
    {
         let contentInsets = UIEdgeInsets.zero
        self.FourthTblMainTableView.contentInset = contentInsets
        self.FourthTblMainTableView.scrollIndicatorInsets = contentInsets
    }
在常规UIViewController swift 3和Xcode 8.1上的UITableViewCell中，滚动键盘上方的UITextField

1） set Delegate=UITextFieldDelegate

  override func viewWillAppear(_ animated: Bool) {

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

   }
      func textFieldDidBeginEditing(_ textField: UITextField) {
          self.activeField = textField
   }
      func textFieldDidEndEditing(_ textField: UITextField) {
        self.activeField = nil
   }


//MARK: - Keyboard Show and Hide Methods
    func keyboardWillShow(notification: NSNotification)
    {
        let info = notification.userInfo! as! [String: AnyObject],
        kbSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue.size,
        contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0)

        self.FourthTblMainTableView.contentInset = contentInsets
        self.FourthTblMainTableView.scrollIndicatorInsets = contentInsets

        var aRect = self.FourthTblMainTableView.frame
        aRect.size.height -= kbSize.height
    }
    func keyboardWillHide(notification: NSNotification)
    {
         let contentInsets = UIEdgeInsets.zero
        self.FourthTblMainTableView.contentInset = contentInsets
        self.FourthTblMainTableView.scrollIndicatorInsets = contentInsets
    }
我混合了马特和萨尔曼的答案。 这适用于tableView中的许多文本字段Swift 3

基本上是触摸文本输入的底部Y点。一旦有了它，我会检查键盘是否覆盖了文本输入，如果覆盖了，我会更改tableView的contentOffset

首先注册到通知。在init if是UIView或viewDidLoad if是UIViewController中：

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
然后将文本字段设置为当前输入

var inputActive: UITextField!

func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
    inputActive = textInput
    return true
}
最后实现通知方法：

func keyboardWillShow(notification: NSNotification) {
    var userInfo = notification.userInfo!
    if let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        // Get my height size
        let myheight = tableView.frame.height
        // Get the top Y point where the keyboard will finish on the view
        let keyboardEndPoint = myheight - keyboardFrame.height
        // Get the the bottom Y point of the textInput and transform it to the currentView coordinates.
        if let pointInTable = inputActive.superview?.convert(inputActive.frame.origin, to: tableView) {
            let textFieldBottomPoint = pointInTable.y + inputActive.frame.size.height + 20
            // Finally check if the keyboard will cover the textInput
            if keyboardEndPoint <= textFieldBottomPoint {
                tableView.contentOffset.y = textFieldBottomPoint - keyboardEndPoint
            } else {
                tableView.contentOffset.y = 0
            }
        }
    }
}

func keyboardWillHide(notification: NSNotification) {
    tableView.contentOffset.y = 0
}

func键盘将显示（通知：NSNotification）{
var userInfo=notification.userInfo！
如果让keyboardFrame=（userInfo[UIKeyboardFrameEndUserInfoKey]作为？NSValue）？.cgRectValue{
//了解我的身高尺寸
设myheight=tableView.frame.height
//获取键盘在视图中结束的Y点
让keyboardEndPoint=myheight-keyboardFrame.height
//获取textInput的底部Y点并将其转换为currentView坐标。
如果let pointInTable=inputActive.superview？.convert（inputActive.frame.origin，to:tableView）{
设textfieldbotompoint=pointInTable.y+inputActive.frame.size.height+20
//最后检查键盘是否覆盖文本输入

如果键盘端点我将马特和萨尔曼的答案混合在一起。
这适用于表视图中的许多文本字段。Swift 3

基本上是触摸文本输入的底部Y点。一旦触摸到，我会检查键盘是否覆盖文本输入，如果覆盖，我会更改tableView的contentOffset

首先注册到通知。如果是UIView，则在init中，如果是UIViewController，则在viewDidLoad中：


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


然后将文本字段设置为当前输入


var inputActive: UITextField!

func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
    inputActive = textInput
    return true
}


最后实现通知方法：


func keyboardWillShow(notification: NSNotification) {
    var userInfo = notification.userInfo!
    if let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        // Get my height size
        let myheight = tableView.frame.height
        // Get the top Y point where the keyboard will finish on the view
        let keyboardEndPoint = myheight - keyboardFrame.height
        // Get the the bottom Y point of the textInput and transform it to the currentView coordinates.
        if let pointInTable = inputActive.superview?.convert(inputActive.frame.origin, to: tableView) {
            let textFieldBottomPoint = pointInTable.y + inputActive.frame.size.height + 20
            // Finally check if the keyboard will cover the textInput
            if keyboardEndPoint <= textFieldBottomPoint {
                tableView.contentOffset.y = textFieldBottomPoint - keyboardEndPoint
            } else {
                tableView.contentOffset.y = 0
            }
        }
    }
}

func keyboardWillHide(notification: NSNotification) {
    tableView.contentOffset.y = 0
}



func键盘将显示（通知：NSNotification）{
var userInfo=notification.userInfo！
如果让keyboardFrame=（userInfo[UIKeyboardFrameEndUserInfoKey]作为？NSValue）？.cgRectValue{
//了解我的身高尺寸
设myheight=tableView.frame.height
//获取键盘在视图中结束的Y点
让keyboardEndPoint=myheight-keyboardFrame.height
//获取textInput的底部Y点并将其转换为currentView坐标。
如果let pointInTable=inputActive.superview？.convert（inputActive.frame.origin，to:tableView

func cell(_ cell: UITableViewCell, willStartEditing view: UIView) {
    if let inputAccessoryViewHeight = view.inputAccessoryView?.frame.size.height {
        var contentOffset = self.tableView.contentOffset
        let pointInTable = view.convert(view.frame.origin, to: self.tableView)
        
        contentOffset.y = pointInTable.y - inputAccessoryViewHeight
        
        self.tableView.setContentOffset(contentOffset, animated: true)
    }
}

func cell(_ cell: UITableViewCell, willEndEditing view: UIView) {
    view.resignFirstResponder()
    
    if let position = self.tableView.indexPath(for: cell) {
        self.tableView.scrollToRow(at: position, at: .middle, animated: true)
    }
}



func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
    delegate?.cell(self, willStartEditing: textField)
    return true
}

func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
    delegate?.cell(self, willEndEditing: textField)
    return true
}