Show Datepicker on Textfield Tap

Display datepicker on tapping on textfield

You can use inputView and inputAccessoryView properties of the text field for this. Create the date picker and set it to the input views of the two text fields. Also create another view for the Done button and it as their accessory view. You will need that button to dismiss the input view.

The Done button must be wired up to function which basically does this –

if ( [textField1 isFirstResponder] ) {
    [textField1 resignFirstResponder];
} else if ( [textField2 isFirstResponder] ) {
    [textField2 resignFirstResponder];
}

Another option would be to subclass UITextField and override inputView and inputAccessoryView. This is the way to go when there are loads of them.

Example

@interface CustomKeyboardAppDelegate : NSObject <UIApplicationDelegate> {
...

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UITextField *textField;
@property (nonatomic, retain) IBOutlet UIToolbar *accessoryView;
@property (nonatomic, retain) IBOutlet UIDatePicker *customInput;

- (IBAction)dateChanged:(id)sender;
- (IBAction)doneEditing:(id)sender;
@end

In the XIB, Pull out a UIToolbar and a UIDatePicker but don't attach it to the view. Connect the outlets appropriately. dateChanged: responds to changes in the date picker and doneEditing: is called when the Done button in the tool bar is clicked. Connect them too. The methods are implemented as listed below.

@implementation CustomKeyboardAppDelegate

@synthesize window=_window;
@synthesize textField = _textField;
@synthesize accessoryView = _accessoryView;
@synthesize customInput = _customInput;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.textField.inputView = self.customInput;
    self.textField.inputAccessoryView = self.accessoryView;
    ...    
}

...

- (IBAction)dateChanged:(id)sender {
    UIDatePicker *picker = (UIDatePicker *)sender;

    self.textField.text = [NSString stringWithFormat:@"%@", picker.date];
}

- (IBAction)doneEditing:(id)sender {
    [self.textField resignFirstResponder];
}
@end

The last two methods will bloat up as more text fields depend on this picker.

Show datepicker on textfield tap

UIResponder, from which UITextField inherits, defines a property called inputView. This property (a UIView *) can define a view that will be displayed instead of the keyboard when that UIResponder becomes the first responder.

Thus, if you want a UIDatePicker to appear when you tap in a textField (ie, you make that textField the first responder), then you can say, naïvely:

UIDatePicker *datePicker = [[UIDatePicker alloc] init...];
... configure datePicker ...

[myTextField setInputView:datePicker];

Now, when your UITextField is tapped, a UIDatePicker will be brought up instead.

HOWEVER

You'll want to do more than this, because you'll need to handle different orientations and different idioms.

But that's the basic idea.

(And if you want a toolbar above the UIDatePicker, that's what the inputAccessoryView property is for...)

How to bring up a date picker when a date field is tapped?

I guess you are taking a UITextField for the input but you have not established a connection between the datePicker and textfield.

Have a look at this answer here

In swift this can be done by textfield.inputView = datePickerView. After this the click on textfield will be handled by datePicker, but you should initialize datePicker before doing this.

how do i show date picker when clicked on textfield

override func viewDidLoad(){
   super.viewDidLoad()
   picker.isHidden = true
   txt3.delegate = self
   //self.txt3.inputView = picker // don't do this 
   self.txt3.inputView = datePicker // do like this.
   let doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.doneButton))
    let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)

    let cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.doneButton)
    toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
    toolBar.isUserInteractionEnabled = true
    txt3.inputAccessoryView = toolBar

}

func doneButton(){
    let selectedDate  = datePicker.date
    print(selectedDate)
    txt3.resignFirstResponder()
}

It will automatically open the date picker.

How to get flutter datepicker value to the textfield?

I fix your code as below (you can select date from DatePicker and you can customise theme of DatePicker):

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';

class TestPickerWidget extends StatefulWidget {
  @override
  _TestPickerWidgetState createState() => _TestPickerWidgetState();
}

class _TestPickerWidgetState extends State<TestPickerWidget> {
  DateTime _selectedDate;
  TextEditingController _textEditingController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextField(
          focusNode: AlwaysDisabledFocusNode(),
          controller: _textEditingController,
          onTap: () {
            _selectDate(context);
          },
        ),
      ),
    );
  }

  _selectDate(BuildContext context) async {
    DateTime newSelectedDate = await showDatePicker(
        context: context,
        initialDate: _selectedDate != null ? _selectedDate : DateTime.now(),
        firstDate: DateTime(2000),
        lastDate: DateTime(2040),
        builder: (BuildContext context, Widget child) {
          return Theme(
            data: ThemeData.dark().copyWith(
              colorScheme: ColorScheme.dark(
                primary: Colors.deepPurple,
                onPrimary: Colors.white,
                surface: Colors.blueGrey,
                onSurface: Colors.yellow,
              ),
              dialogBackgroundColor: Colors.blue[500],
            ),
            child: child,
          );
        });

    if (newSelectedDate != null) {
      _selectedDate = newSelectedDate;
      _textEditingController
        ..text = DateFormat.yMMMd().format(_selectedDate)
        ..selection = TextSelection.fromPosition(TextPosition(
            offset: _textEditingController.text.length,
            affinity: TextAffinity.upstream));
    }
  }
}

class AlwaysDisabledFocusNode extends FocusNode {
  @override
  bool get hasFocus => false;
}

and also you must add Intl dependency in your pubspec.yaml :

dev_dependencies:
  flutter_test:
    sdk: flutter
  intl: ^0.16.1

Finally call TestPickerWidget in your main for testing it.

I want in one textfield it can be show keyboard and datepicker

You've to try this

class yourViewController: UIViewController,UITextFieldDelegate 
{
   var screenHeight = UIScreen.main.bound.height
   var screenWidth = UIScreen.main.bound.width
   var dateFormatter = DateFormatter()
   var doneButton = UIBarButtonItem()
   var cancelButton = UIBarButtonItem()
   var timeValueLabel = UIBarButtonItem()
   var datePicker : UIDatePicker!
   var toolBarDtPicker = UIToolbar()

 //MARK:- Life Cycle
   override func viewDidLoad() {
   super.viewDidLoad()

   yourTxtField.delegate = self
  }

 //TextField Editing Begin Function
 func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool
 {
    self.hideKeyboard()
    textField.inputView = nil
    textfieldEding(sender: textField)
    return false
 }

 //To Hide Keyboard
 @objc func hideKeyboard()
 {
   UIApplication.shared.sendAction(#selector(UIApplication.resignFirstResponder), to: nil, from: nil, for: nil)
 }

 //DatePicker Function
func datePickerView()
{

  if ((self.datePicker != nil) && (self.datePicker.superview != nil))
  {
     datePicker.removeFromSuperview()
  }

  self.datePicker = UIDatePicker(frame: CGRect(x: 0, y: 
  UIScreen.main.bounds.height-200, width: UIScreen.main.bounds.width, height: 200))
   self.datePicker.backgroundColor = UIColor.white

   self.datePicker.addTarget(self, action: #selector(dateHandler), for: .valueChanged)
   self.view.addSubview(datePicker)

   toolBarDtPicker = UIToolbar(frame: CGRect(x: 0, y: screenHeight-230, width: screenWidth, height: 30))
   toolBarDtPicker.barStyle = .default
   toolBarDtPicker.isTranslucent = false
   toolBarDtPicker.barTintColor = UIColor.blue
   toolBarDtPicker.sizeToFit()

   // Adding Button ToolBar
   doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(doneClick))
   let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
   timeValueLabel = UIBarButtonItem(title: " ", style: .plain, target: self, action: nil)
   let spaceButton2 = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
   cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelClick))
   doneButton.tintColor = UIColor.white
   timeValueLabel.tintColor = UIColor.white
   cancelButton.tintColor = UIColor.white
   toolBarDtPicker.setItems([cancelButton, spaceButton, timeValueLabel, spaceButton2, doneButton], animated: true)
   toolBarDtPicker.isUserInteractionEnabled = true

   self.view.addSubview(toolBarDtPicker)
   self.toolBarDtPicker.isHidden = false

   datePicker.datePickerMode = .date
   dateFormatter.dateStyle = .medium
   dateFormatter.dateFormat = "EEEE dd MMM yyyy"

 }

 @objc func textfieldEding(sender: UITextField)
 {
     datePickerView()
 }

 @IBAction func showKeyBoard(_ sender: UIButton!)
 {        
     self.yourTxtField.becomeFirstResponder()
 }

 //MARK: DatePicker

 @objc func dateHandler(sender: UIDatePicker)
 {
     dateFormatter.dateFormat = "EEEE dd MMM yyyy"
     timeValueLabel.title = dateFormatter.string(from: sender.date)
 }

 @objc func doneClick() //DatePIcker Done Button
 {
    //Done Button Code
 }

 //MARK: Cancel Btn

 @objc func cancelClick() //DatePIcker Cancel Button
 {
    if ((self.datePicker != nil) && (self.datePicker.superview != nil))
    {
      datePicker.removeFromSuperview()
    }
    toolBarDtPicker.removeFromSuperview()
  }

}

displaying datepicker on the tap of a particular text field only

If you have your UITextField as an attribute of the class simply check it on the delegate method

- (BOOL) textFieldShouldBeginEditing: (UITextField*) textField {
      if (textField == _datePickerField) {
        // Show picker
      }
}

If not, UITextField is a subclass of UIView. You can tag it when created with the value of an enumeration and then, on the delegate method check the tag. If the textField you are editing is the one who raises the DatePicker, do it.

enum {
  iee_Field1 = 0,
  iee_Field2,
  iee_DatePcikerField
};

- (BOOL) textFieldShouldBeginEditing: (UITextField*) textField {
  if (textField.tag == iee_DatePickerField) {
    // Show picker
  }
}

DatePicker opening on second click on TextField

Make first responder on button click

@IBAction func eodAction(_ sender: UITextField) {

    deregisterFromKeyboardNotifications()
    self.button.isHidden=true
    eodDateTime.becomeFirstResponder()
//        self.pickUpDate(eodDateTime)
}

And implement textFieldShouldBeginEditing method to show date picket in input view

extension ATMDiscrepancyViewController: UITextFieldDelegate {

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
    if textField == eodDateTime {
        self.pickUpDate(eodDateTime)
    }
}
}

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