在UIScrollView中关闭UITextField十进制小键盘键盘(Dismiss UITextField decimal pad keyboard in UIScrollView)

我正在为我的问题寻找解决方案，但我发现的所有建议都无法正常工作。

我开始使用基于两个带有十进制小键盘的TextField的工作解决方案。在任何地方点击时解除键盘，考虑到我没有返回键，我成功使用：

view.endEditing(true)

当我决定添加UIScrollView以便向上移动屏幕底部的UITextField时，我的问题就出现了。

view.endEditing（true）不起作用，因为scrollview覆盖视图。我添加了一个TapGestureRecognizer ，除键盘关闭以外的所有工作。

在TapGestureReconizer函数下，如果我在resignFirstResponder上使用activeTextFiled ，应用程序崩溃将转到AppDelegate并显示错误：

线程1：信号SIGABRT。

class ViewController: UIViewController, UITextFieldDelegate { var activeField: UITextField? @IBOutlet weak var textFieldTop: UITextField! @IBOutlet weak var textFieldBottom: UITextField! @IBOutlet weak var scrollView: UIScrollView! func textFieldDidBeginEditing(textField: UITextField) { activeField = textField } func textFieldDidEndEditing(textField: UITextField) { activeField = nil } func registerForKeyboardNotifications() { NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden", name: UIKeyboardWillHideNotification, object: nil) } func deregisterFromKeyBoardNotification() { NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil) } func keyboardWasShown(notification: NSNotification) { self.scrollView.scrollEnabled = true let info : NSDictionary = notification.userInfo! let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().size let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize!.height + 20, 0.0) self.scrollView.contentInset = contentInsets self.scrollView.scrollIndicatorInsets = contentInsets var aRect : CGRect = self.view.frame aRect.size.height -= keyboardSize!.height if let _ = activeField { if (!CGRectContainsPoint(aRect, activeField!.frame.origin)) { self.scrollView.scrollRectToVisible(activeField!.frame, animated: true) } } self.scrollView.scrollEnabled = false } func keyboardWillBeHidden(notification: NSNotification) { let info : NSDictionary = notification.userInfo! let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().size let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0) self.scrollView.contentInset = contentInsets self.scrollView.scrollIndicatorInsets = contentInsets self.scrollView.scrollEnabled = false } override func viewDidLoad() { super.viewDidLoad() registerForKeyboardNotifications() self.textFieldBottom.delegate = self self.textFieldTop.delegate = self scrollView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "closeKeyboard")) } func closeKeyboard() { activeField?.resignFirstResponder() } }

我尝试了不同的解决方案，但没有一个能正常工作。

I'm looking for a solution to my problem but all the suggestions I've found are not working.

I started with a working solution that is based on two TextField with decimal pad. To dismiss the keyboard when is tapped anywhere, considering i do not have the return key, I used successfully:

view.endEditing(true)

My problem stars when I decide to add UIScrollView in order to move up the UITextField on the bottom of the screen.

The view.endEditing(true) is not working because the scrollview is covering view. I add a TapGestureRecognizer and everything work except the keyboard dismiss.

Under the TapGestureReconizer function if I use resignFirstResponder on the activeTextFiled the app crash going to AppDelegate with error:

Thread 1: signal SIGABRT.

class ViewController: UIViewController, UITextFieldDelegate { var activeField: UITextField? @IBOutlet weak var textFieldTop: UITextField! @IBOutlet weak var textFieldBottom: UITextField! @IBOutlet weak var scrollView: UIScrollView! func textFieldDidBeginEditing(textField: UITextField) { activeField = textField } func textFieldDidEndEditing(textField: UITextField) { activeField = nil } func registerForKeyboardNotifications() { NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWasShown:", name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden", name: UIKeyboardWillHideNotification, object: nil) } func deregisterFromKeyBoardNotification() { NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil) NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil) } func keyboardWasShown(notification: NSNotification) { self.scrollView.scrollEnabled = true let info : NSDictionary = notification.userInfo! let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().size let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize!.height + 20, 0.0) self.scrollView.contentInset = contentInsets self.scrollView.scrollIndicatorInsets = contentInsets var aRect : CGRect = self.view.frame aRect.size.height -= keyboardSize!.height if let _ = activeField { if (!CGRectContainsPoint(aRect, activeField!.frame.origin)) { self.scrollView.scrollRectToVisible(activeField!.frame, animated: true) } } self.scrollView.scrollEnabled = false } func keyboardWillBeHidden(notification: NSNotification) { let info : NSDictionary = notification.userInfo! let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().size let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0) self.scrollView.contentInset = contentInsets self.scrollView.scrollIndicatorInsets = contentInsets self.scrollView.scrollEnabled = false } override func viewDidLoad() { super.viewDidLoad() registerForKeyboardNotifications() self.textFieldBottom.delegate = self self.textFieldTop.delegate = self scrollView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "closeKeyboard")) } func closeKeyboard() { activeField?.resignFirstResponder() } }

I've tried different solution but none of them are working.

最满意答案

我仍然期待代码/故事板中的某个代表或其他可能缺失的部分，但花费额外的时间检查我发现问题。

NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)

我在原始代码中忘记了“keyboardWillBeHidden：”末尾的“：”。这是抛出一个异常，因为这个函数有一个参数。

现在一切正常

I was still looking to some delegate or other possible missing part in the code/storyboard but spending additional hours checking I found the problem.

NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil)

I forgot in the original code the ":" at the end of "keyboardWillBeHidden:". This was throwing an exception because this function has an argument.

Now everything is working properly

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