Questions with interactivePopGestureRecognizer when keyboard shown - objective-c

Question

This is Screenshot
In View B, When keyboard is shown and pop viewController to View A with interactivePopGestureRecognizer, the keyboard is still stay here :(
How can let keyboard move with view B ?
(like iMessage or Facebook Messenger)
ps: I'm try to get keyboard view and add to self.view, it's useful, but i think it's not a good way.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardDidShown)
name:UIKeyboardDidShowNotification object:nil];
and
- (void)keyboardDidShown
{
UIView * keyboardView = self.textView.inputAccessoryView.superview;
[self.view addSubview: keyboardView];
}

Answer 1

Try this solution:
https://github.com/cotap/TAPKeyboardPop
This is lightweight category that listens interactivePopGestureRecognizer gesture and animating keyboard accordingly.

Answer 2

You don't add keybordView to the view. If you want to show keyboard for your UITextField/UITextView you call becomeFirstResponder on that object. In your example it should be:
[self.textView becomeFirstResponder];
If you want to hide keyboard you call:
[self.textView resignFirstResponder];
And if you want to hide your keyboard before you dismiss your ViewA you should call it in the beginning of your interactivePopGestureRecognizer when you start animation to show ViewB.
Hope it help.
//EXTENDED
I don't know why you are trying to add accessoryView as a subview to your view
- (void)keyboardDidShown
{
UIView * keyboardView = self.textView.inputAccessoryView.superview;
[self.view addSubview: keyboardView];
}
And I don't understand why do you use notification centre.
The functionality that the keyboard stay when you dismissed the view (as iMessage app) is a standard functionality.
Just use
[self.textView becomeFirstResponder];
when you want to show the keyboard and don't call
[self.textView resignFirstResponder];
when you pop your view controller. iOS does the job for you.