隐藏键盘返回按钮
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【中文标题】隐藏键盘返回按钮【英文标题】：Hide a keyboard return button 【发布时间】：2018-03-07 06:39:41 【问题描述】：我在这个 ViewController 中有多个文本字段，其中对于某些文本字段，我需要带有返回按钮的数字键盘和两个带有字母数字键盘的文本字段和一个带有日期选择器的文本字段。 一切正常，但是当我单击带有字母数字键盘的文本字段时，数字键盘的返回按钮也会出现。
lastTransaction 和备注文本字段有字母数字键盘，我可以在其中获得返回按钮
请帮助我如何删除返回按钮。
下面是代码。
import UIKit
class ATMDiscrepancyViewController: UIViewController, UIScrollViewDelegate,UITextFieldDelegate
var datePicker : UIDatePicker!
@IBOutlet weak var Shortage50: UITextField!
@IBOutlet weak var shortage100: UITextField!
@IBOutlet weak var shortage500: UITextField!
@IBOutlet weak var shortage2000: UITextField!
@IBOutlet weak var overage50: UITextField!
@IBOutlet weak var overage100: UITextField!
@IBOutlet weak var overage500: UITextField!
@IBOutlet weak var overage2000: UITextField!
@IBOutlet weak var soild50: UITextField!
@IBOutlet weak var soild100: UITextField!
@IBOutlet weak var soild2000: UITextField!
@IBOutlet weak var newbd50: UITextField!
@IBOutlet weak var newbd100: UITextField!
@IBOutlet weak var newbd500: UITextField!
@IBOutlet weak var newbd2000: UITextField!
@IBOutlet weak var closingbd50: UITextField!
@IBOutlet weak var closingbd2000: UITextField!
@IBOutlet weak var oldbd50: UITextField!
@IBOutlet weak var oldbd100: UITextField!
@IBOutlet weak var oldbd500: UITextField!
@IBOutlet weak var wrongfeed500: UITextField!
@IBOutlet weak var wrongfeed50: UITextField!
@IBOutlet weak var wrongfeed2000: UITextField!
@IBOutlet weak var preclosing50: UITextField!
@IBOutlet weak var preclosing500: UITextField!
@IBOutlet weak var preclosing2000: UITextField!
@IBOutlet weak var remarks: UITextField!
@IBOutlet weak var lastTransaction: UITextField!
@IBOutlet weak var eodDateTime: UITextField!
@IBOutlet weak var preclosing100: UITextField!
@IBOutlet weak var wrongfeed100: UITextField!
@IBOutlet weak var oldbd2000: UITextField!
@IBOutlet weak var closingbd500: UITextField!
@IBOutlet weak var closingbd100: UITextField!
@IBOutlet weak var soild500: UITextField!
var atmData : SelectedATM!
@IBOutlet weak var scrollView: UIScrollView!
var activeField: UITextField?
var ATMTransBefore : ATMTransactionEODS1Model? = nil
var ATMTransAfter : ATMTransactionEODS1Model? = nil
var ATMCounterBefore : ATMCounterModel? = nil
var ATMCounterAfter : ATMCounterModel? = nil
var ATMPhysical : PhysicalModel? = nil
var ATMMAster : ATMMasterModel? = nil
var selectedDate : String = ""
var alertControllerScanCode:CustViewController!
let button = UIButton(type: UIButtonType.custom)
@IBOutlet weak var saveAction: UIButton!
func datePickerValuechanged (sender : UIDatePicker)
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = DateFormatter.Style.medium
dateFormatter.timeStyle = DateFormatter.Style.none
eodDateTime.text = dateFormatter.string(from: sender.date)
selectedDate = dateFormatter.string(from: sender.date)
self.view.endEditing(true)
@IBAction func eodAction(_ sender: UITextField)
deregisterFromKeyboardNotifications()
self.button.isHidden=true
self.pickUpDate(eodDateTime)
func pickUpDate(_ textField : UITextField)
deregisterFromKeyboardNotifications()
self.button.isHidden=true
self.button.isEnabled = false
NotificationCenter.default.addObserver(self, selector: #selector(ATMDiscrepancyViewController.keyboardRemoveReturn(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
// DatePicker
self.datePicker = UIDatePicker(frame:CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 216))
self.datePicker.backgroundColor = UIColor.white
self.datePicker.datePickerMode = UIDatePickerMode.dateAndTime
textField.inputView = self.datePicker
// ToolBar
let toolBar = UIToolbar()
toolBar.barStyle = .default
toolBar.isTranslucent = true
toolBar.tintColor = UIColor(red: 92/255, green: 216/255, blue: 255/255, alpha: 1)
toolBar.sizeToFit()
// Adding Button ToolBar
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ATMDiscrepancyViewController.doneClick))
let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(ATMDiscrepancyViewController.cancelClick))
toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
textField.inputAccessoryView = toolBar
func doneClick()
let dateFormatter1 = DateFormatter()
// let timeFormatter = DateFormatter()
dateFormatter1.dateStyle = .medium
dateFormatter1.timeStyle = .none
dateFormatter1.dateFormat = "yyyy-MM-dd HH:mm:SS"
eodDateTime.text = dateFormatter1.string(from: datePicker.date)
eodDateTime.resignFirstResponder()
func cancelClick()
eodDateTime.resignFirstResponder()
func handleDatePicker(sender: UIDatePicker)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
eodDateTime.text = dateFormatter.string(from: sender.date)
selectedDate = dateFormatter.string(from: sender.date)
func doneButton(sender:UIButton)
eodDateTime.resignFirstResponder() // To resign the inputView on clicking done.
eodDateTime.text = selectedDate
override func viewDidLoad()
super.viewDidLoad()
self.navigationItem.title = "Discrepancy"
registerForKeyboardNotifications()
button.setTitle("Return", for: UIControlState())
button.setTitleColor(UIColor.black, for: UIControlState())
button.frame = CGRect(x: 0, y: 163, width: 106, height: 53)
button.adjustsImageWhenHighlighted = false
button.addTarget(self, action: #selector(ATMDiscrepancyViewController.Done(_:)), for: UIControlEvents.touchUpInside)
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ATMDiscrepancyViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
self.Shortage50.delegate = self
self.shortage100.delegate = self
self.shortage500.delegate = self
self.shortage2000.delegate = self
self.overage50.delegate = self
self.overage100.delegate = self
self.overage500.delegate = self
self.overage2000.delegate = self
self.soild50.delegate = self
self.soild100.delegate = self
self.soild500.delegate = self
self.soild2000.delegate = self
self.newbd50.delegate = self
self.newbd100.delegate = self
self.newbd500.delegate = self
self.newbd2000.delegate = self
self.closingbd50.delegate = self
self.closingbd100.delegate = self
self.closingbd500.delegate = self
self.closingbd2000.delegate = self
self.oldbd50.delegate = self
self.oldbd100.delegate = self
self.oldbd500.delegate = self
self.oldbd2000.delegate = self
self.wrongfeed50.delegate = self
self.wrongfeed100.delegate = self
self.wrongfeed500.delegate = self
self.wrongfeed2000.delegate = self
self.preclosing50.delegate = self
self.preclosing100.delegate = self
self.preclosing500.delegate = self
self.preclosing2000.delegate = self
self.remarks.delegate = self
self.lastTransaction.delegate = self
self.eodDateTime.delegate = self
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?)
self.view.endEditing(true)
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool
if textField == self.lastTransaction || textField == self.remarks
let textString = (textField.text as! NSString).replacingCharacters(in: range, with: string)
return true
let allowedCharacters = CharacterSet.decimalDigits
let characterSet = CharacterSet(charactersIn: string)
return allowedCharacters.isSuperset(of: characterSet)
func textFieldShouldReturn(_ textField: UITextField) -> Bool
self.Shortage50.resignFirstResponder()
self.shortage100.resignFirstResponder()
self.shortage500.resignFirstResponder()
self.shortage2000.resignFirstResponder()
self.overage50.resignFirstResponder()
self.overage100.resignFirstResponder()
self.overage500.resignFirstResponder()
self.overage2000.resignFirstResponder()
self.soild50.resignFirstResponder()
self.soild100.resignFirstResponder()
self.soild500.resignFirstResponder()
self.soild2000.resignFirstResponder()
self.Shortage50.becomeFirstResponder()
self.lastTransaction.resignFirstResponder()
self.remarks.resignFirstResponder()
if textField == self.Shortage50
if isEmptyValidate(edit: self.Shortage50) == true
return false
self.shortage100.becomeFirstResponder()
if textField == self.shortage100
if isEmptyValidate(edit: self.shortage100) == true
return false
self.shortage500.becomeFirstResponder()
if textField == self.shortage500
if isEmptyValidate(edit: self.shortage500) == true
return false
self.shortage2000.becomeFirstResponder()
if textField == self.shortage2000
if isEmptyValidate(edit: self.shortage2000) == true
return false
self.overage50.becomeFirstResponder()
if textField == self.overage50
if isEmptyValidate(edit: self.overage50) == true
return false
self.overage100.becomeFirstResponder()
if textField == self.overage100
if isEmptyValidate(edit: self.overage100) == true
return false
self.overage500.becomeFirstResponder()
if textField == self.overage500
if isEmptyValidate(edit: self.overage500) == true
return false
self.overage2000.becomeFirstResponder()
if textField == self.overage2000
if isEmptyValidate(edit: self.overage2000) == true
return false
self.soild50.becomeFirstResponder()
if textField == self.soild50
if isEmptyValidate(edit: self.soild50) == true
return false
self.soild100.becomeFirstResponder()
if textField == self.soild100
if isEmptyValidate(edit: self.soild100) == true
return false
self.soild500.becomeFirstResponder()
if textField == self.soild500
if isEmptyValidate(edit: self.soild500) == true
return false
self.soild2000.becomeFirstResponder()
if textField == self.soild2000
if isEmptyValidate(edit: self.soild2000) == true
return false
self.button.isHidden=true
self.lastTransaction.becomeFirstResponder()
dismissKeyboard()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
if textField == self.lastTransaction
if isEmptyValidate(edit: self.lastTransaction) == true
return false
self.button.isHidden = true
self.remarks.becomeFirstResponder()
if textField == self.remarks
if isEmptyValidate(edit: self.remarks)
return false
return true
func valid() -> Bool
if isEmptyValidate(edit: Shortage50) == true
return false
if isEmptyValidate(edit: shortage100) == true
return false
if isEmptyValidate(edit: shortage500) == true
return false
if isEmptyValidate(edit: shortage2000) == true
return false
if isEmptyValidate(edit: overage50) == true
return false
if isEmptyValidate(edit: overage100) == true
return false
if isEmptyValidate(edit: overage500) == true
return false
if isEmptyValidate(edit: overage2000) == true
return false
if isEmptyValidate(edit: soild50) == true
return false
if isEmptyValidate(edit: soild100) == true
return false
if isEmptyValidate(edit: soild500) == true
return false
if isEmptyValidate(edit: soild2000) == true
return false
if isEmptyValidate(edit: eodDateTime) == true
return false
return true
func isEmptyValidate(edit : UITextField) ->Bool
if edit.text?.isEmpty ?? true
edit.attributedPlaceholder = NSAttributedString(string: "Enter value", attributes: [NSForegroundColorAttributeName : UIColor.red])
return true
return false
func registerForKeyboardNotifications()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
func deregisterFromKeyboardNotifications()
//Removing notifies on keyboard appearing
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
func keyboardWasShown(notification: NSNotification)
//Need to calculate keyboard exact size due to Apple suggestions
self.scrollView.isScrollEnabled = true
var info = 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
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardSize!.height
if let activeField = self.activeField
if (!aRect.contains(activeField.frame.origin))
self.scrollView.scrollRectToVisible(activeField.frame, animated: true)
func keyboardWillBeHidden(notification: NSNotification)
//Once keyboard disappears, restore original positions
var info = notification.userInfo!
self.view.endEditing(true)
self.scrollView.isScrollEnabled = true
func textFieldDidBeginEditing(_ textField: UITextField)
activeField = textField
NotificationCenter.default.addObserver(self, selector: #selector(ATMDiscrepancyViewController.keyboardWillShow(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
func textFieldDidEndEditing(_ textField: UITextField)
activeField = nil
func dismissKeyboard()
view.endEditing(true)
func keyboardWillShow(_ note : Notification) -> Void
DispatchQueue.main.async () -> Void in
self.button.isHidden = false
self.scrollView.isScrollEnabled = true
var info = note.userInfo!
let keyBoardWindow = UIApplication.shared.windows.last
self.button.frame = CGRect(x: 0, y: (keyBoardWindow?.frame.size.height)!-53, width: 106, height: 53)
keyBoardWindow?.addSubview(self.button)
keyBoardWindow?.bringSubview(toFront: self.button)
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
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardSize!.height
if let activeField = self.activeField
if (!aRect.contains(activeField.frame.origin))
self.scrollView.scrollRectToVisible(activeField.frame, animated: true)
UIView.animate(withDuration: (((note.userInfo! as NSDictionary).object(forKey: UIKeyboardAnimationCurveUserInfoKey) as AnyObject).doubleValue)!, delay: 0, options: UIViewAnimationOptions.curveEaseIn, animations: () -> Void in
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: 0)
, completion: (complete) -> Void in
)
func Done(_ sender : UIButton)
DispatchQueue.main.async () -> Void in
self.textFieldShouldReturn(self.activeField!)
func keyboardRemoveReturn(_ note : Notification) -> Void
DispatchQueue.main.async () -> Void in
self.button.isHidden = true
UIView.animate(withDuration: (((note.userInfo! as NSDictionary).object(forKey: UIKeyboardAnimationCurveUserInfoKey) as AnyObject).doubleValue)!, delay: 0, options: UIViewAnimationOptions.curveEaseIn, animations: () -> Void in
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: 0)
, completion: (complete) -> Void in
)
谢谢..
【问题讨论】：
尝试 lastTransaction.enablesReturnKeyAutomatically = false 禁用返回键 @suhit 我使用了自定义按钮返回.. 所以这不起作用 为什么不能使用 IQKeyboardManager，你不需要在文本字段上添加自定义按钮。 github.com/hackiftekhar/IQKeyboardManager 谁能帮我解决这个问题 【参考方案1】：请确保已设置文本字段委托。
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool
if textField == self.lastTransaction || textField == remarks
self.button.isHidden = true; //button is Return button
else
//show as you required
return true
【讨论】：
感谢它有效，但仅适用于 lastTransaction 文本字段，不适用于备注和 eoddatetime 文本字段 只需将调试点放在textFieldShouldBeginEditing 并检查何时点击备注文本字段，然后检查 self.button.isHidden 属性。【参考方案2】：
试试这个！
func textFieldDidBeginEditing(textField: UITextField)
if textField == self.lastTransaction
self.button.isHidden = true;
【讨论】：
谢谢我现在试过了，但这也不起作用。【参考方案3】：您可以将标签分配给UIToolbar的cancelButton
let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(VC.cancelClick))
cancelButton.tag = 1001
然后实现UITextFieldDelegate方法textFieldShouldBeginEditing，您可以在其中检查textField类型并禁用取消/返回按钮
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool
if textField == self.lastTransaction
let cancelButton = toolBar.subviews.flatMap ( $0 as? UIBarButtonItem ).filter $0.tag == 1001 .first as! UIBarButtonItem
cancelButton.isEnabled = false
return true
【讨论】：
你给cancelButton添加标签了吗？尝试添加断点并检查以上是关于隐藏键盘返回按钮的主要内容，如果未能解决你的问题，请参考以下文章