隐藏键盘返回按钮 [英] Hide a keyboard return button
本文介绍了隐藏键盘返回按钮的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在这个 ViewController 中有多个 TextField，其中对于某些文本字段，我需要带返回按钮的数字键盘和两个带字母数字键盘的文本字段和一个带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，也会出现数字键盘的返回按钮.
I am have multiple TextFields in this ViewController in which for some textfields i need numeric keyboard with a return button and two textfields with alphanumeric keyboard and one textfield with a date picker. Everything is working fine but when I click on a textfield with alphanumeric keyboard, the return button from the numeric keyboard also appears.
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
The lastTransaction and remarks textfields have alphanumeric keyboards where I get return button
请帮助我如何删除返回按钮.
Please help me how do I remove that return button.
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..
推荐答案
请确保已设置文本提交委托.
Please make sure that text filed delegate is set.
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
}
这篇关于隐藏键盘返回按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
