Show picker view (UIDatePicker) on tapping text field.

We can use inputView and inputAccessoryView of UITextField. Declare in .h file, and @synthesize in .m file.

@property (nonatomic, retain) IBOutlet UIToolbar    *_accessoryView;
@property (nonatomic, retain) IBOutlet UIDatePicker *_datePickerView;

Connect them to File's Owner in .xib file, make sure that its out of the self.view.

- (void)viewDidLoad
    {   
        _dateOfBirthTextField.inputView = self._datePickerView;
        _dateOfBirthTextField.inputAccessoryView = self._toolbar;
    }

Also write function to fetch date from the picker

#pragma mark- UITextField with UIDatePicker-

- (IBAction)dateChanged:(id)sender {
    UIDatePicker *picker = (UIDatePicker *)sender;
    _dateOfBirthTextField.text = [NSString stringWithFormat:@"%@", picker.date];
}

- (IBAction)doneEditing:(id)sender {
    [_dateOfBirthTextField resignFirstResponder];
}

Add dateChanged: IBAction on valueChanged: action of _datePicker. and doneEditing: IBAction on toolbar barbutton action.