keyboard notification not called in ios 11.3 - ios

Question

I have keyboard notification in my App and its working fine in ios 10 but my notification method not called in ios11.3
Below is my code:
- (void)attach {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWasShown:(NSNotification*)aNotification {
UIView* responder = [self findFirstResponder];
if (responder) {
_tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(didTapAnywhere:)];
[baseView addGestureRecognizer:_tapRecognizer];
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
CGRect screenRect = [RGLayout layout].fullScreen;
CGRect frame = responder.frame ;
}
}
I have tried to find the solution and i got that the only changes in iOS11 is UIKeyboardFrameEndUserInfoKey for keyborad height.
But my problem is that my keyboardWasShown not called in ios11.3 same code is working ios 10.2
FYI: when user click on next the next textField will becomeFirstResponder.

Answer 1

Don't know why but the behaviour is strange the notification is calling in one screen and not in another screen.
I have solve the issue by following code:
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
if (self.nextField) {
dispatch_async(dispatch_get_main_queue(), ^{
[self.nextField becomeFirstResponder];
[[NSNotificationCenter defaultCenter] postNotificationName: UIKeyboardDidShowNotification object:self];
});
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
[textField resignFirstResponder] ;
});
}
return NO ;
}