我点击了TextField，自定义日期选择器应该打开。但首次点击键盘打开，第二次点击日期选择器打开。请帮我看一下如何在第一次点击时显示日期选择器。 eodDateTime我的TextField在这里我希望日期选择器在单击文本字段时显示并在同一文本字段中显示所选日期时间
这是我的代码：
import UIKit
class ATMDiscrepancyViewController: UIViewController, UIScrollViewDelegate,UITextFieldDelegate
{
var datePicker : UIDatePicker!
@IBOutlet weak var remarks: UITextField!
@IBOutlet weak var lastTransaction: UITextField!
@IBOutlet weak var eodDateTime: UITextField!
var atmData : SelectedATM!
@IBOutlet weak var scrollView: UIScrollView!
var activeField: UITextField?
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.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.lastTransaction.resignFirstResponder()
self.remarks.resignFirstResponder()
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: 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){
if textField == self.lastTransaction {
//self.button.isHidden = true;
NotificationCenter.default.addObserver(self, selector: #selector(ATMDiscrepancyViewController.keyboardRemoveReturn(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
}
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
})
}
}
}
由于
答案 0 :(得分：1)
点击按钮
制作第一响应者@IBAction func eodAction(_ sender: UITextField) {
deregisterFromKeyboardNotifications()
self.button.isHidden=true
eodDateTime.becomeFirstResponder()
// self.pickUpDate(eodDateTime)
}
并实施textFieldShouldBeginEditing方法以在输入视图中显示日期纠察队
extension ATMDiscrepancyViewController: UITextFieldDelegate {
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
if textField == eodDateTime {
self.pickUpDate(eodDateTime)
}
}
}
答案 1 :(得分：0)
我无法理解整个代码，但解决此问题的最佳方法是将选择器指定为viewDidLoad中的inputView。因此，在viewDidLoad中放置以下代码，它应该可以正常工作：
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