UITextfield显示在键盘 – 初学者的顶部

我有textboxes 。 当我点击它，键盘popup。 但是，由于uitextfield位于uitextfield下方，所以在popup键盘时会覆盖它。 （键盘显示在文本字段上方，因此用户无法看到它）。

我需要一种方法来移动textfield ，以便用户可以看到它。 iPhone的facebook应用程序有一个解决方法，他们收缩UIComponents视图上显示的textfield ，所以它不包括从键盘。

有人能指点我一个教程或示例代码开始？

Answer 1

选项-1：你可以在这个链接中参考这个被接受的代码作为答案：

当键盘存在时如何使UITextField向上移动？

这一定会帮助你，并给你你需要的解决scheme。

选项-2：这里也是一个现成的教程：

http://www.edumobile.org/iphone/iphone-programming-tutorials/scrollview-example-in-iphone/

我认为你肯定会得到这个帮助

选项-3：你可以参考这个：

http://www.iphonesampleapps.com/2009/12/adjust-uitextfield-hidden-behind-keyboard-with-uiscrollview/

选项-4：苹果文档：

https://developer.apple.com/library/ios/#DOCUMENTATION/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html

希望这可以帮助你。

Answer 2

在iOS9上处理空间案例，如预测文本打开和closures以及不同大小的键盘。

1. 全局variables来存储您的默认视图框架

 var defaultFrame: CGRect! 

2. 在init（）保存您的初始框架和订阅键盘通知

 defaultFrame = self.frame NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyBoardWillShow:", name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyBoardWillHide:", name: UIKeyboardWillHideNotification, object: nil) 

3. 简单的function来重新定位你的看法

 func moveViewWithKeyboard(height: CGFloat) { self.frame = CGRectOffset(defaultFrame, 0, height) } 

4. 根据内部的密码input偏移进行移动

 func keyBoardWillShow(notification: NSNotification) { let frame = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() moveViewWithKeyboard(-frame.height) } func keyBoardWillHide(notification: NSNotification) { moveViewWithKeyboard(0) } 

Answer 3

最好的方法是使用UIScrollView并在需要开始编辑文本时向上移动。 这个问题/答案会给你一个粗略的指导，让它成立

当键盘出现时，如何使UITextField向上移动

Answer 4

它可能会帮助你… bottomLayoutConstrain是从文本字段到底部视图的底部约束，从你想要的位置开始。 SWIFT代码：

  NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShowNotification:", name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHideNotification:", name: UIKeyboardWillHideNotification, object: nil) func keyboardWillShowNotification(notification:NSNotification){ let keyboardInfo:NSDictionary = notification.userInfo! let keyboardFrameBegin:AnyObject = keyboardInfo.valueForKey(UIKeyboardFrameEndUserInfoKey)! keyboardFrameBeginRect = keyboardFrameBegin.CGRectValue self.view.layoutIfNeeded() self.bottomLayoutConstrain.constant = self.keyboardFrameBeginRect!.height self.view.layoutIfNeeded() } func keyboardWillHideNotification(notification:NSNotification){ self.view.layoutIfNeeded() bottomLayoutConstrain?.constant = 0 self.view.layoutIfNeeded() } deinit { // perform the deinitialization NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil) // NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardDidShowNotification, object: nil) NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil) } 

目标C代码

 - (void)viewDidLoad { [super viewDidLoad]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowNotification:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHideNotification:) name:UIKeyboardWillHideNotification object:nil]; } - (void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self]; } -(void) keyboardWillShowNotification:(NSNotification *) notification{ NSDictionary *keyboardInfo = notification.userInfo; keyboardFrameBeginRect = [keyboardInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue]; [self.view layoutIfNeeded]; // [UIView animateWithDuration:1.0 animations:^{ topLayoutConstraints.constant = -keyboardFrameBeginRect.size.height; bottomLayoutConstrain.constant = keyboardFrameBeginRect.size.height; // }]; [self.view layoutIfNeeded]; } -(void) keyboardWillHideNotification:(NSNotification *) notification{ [self.view layoutIfNeeded]; topLayoutConstraints.constant = 0; bottomLayoutConstrain.constant = 0; [self.view layoutIfNeeded]; }