Move & Resize textview automatically along with keyboard -- IOS

@property (nonatomic) CGRect originalTextViewFrame;

- (void)viewWillAppear:(BOOL)animated

 {

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

}

- (void)viewWillDisappear:(BOOL)animated 

{

[[NSNotificationCenter defaultCenter] removeObserver:self];

}

- (void)keyboardWillShow:(NSNotification*)notification

 {

[self moveTextView:notification up:YES];

}

- (void)keyboardWillHide:(NSNotification*)notification 

{

[self moveTextView:notification up:NO];

}

- (void)moveTextView:(NSNotification*)notification up:(BOOL)up

 {

NSDictionary *userInfo = [notification userInfo];

NSTimeInterval animationDuration;

UIViewAnimationCurve animationCurve;

CGRect keyboardRect;

[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];

animationDuration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

keyboardRect = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

keyboardRect = [self.view convertRect:keyboardRect fromView:nil];

[UIView beginAnimations:@"ResizeForKeyboard" context:nil];

[UIView setAnimationDuration:animationDuration];

[UIView setAnimationCurve:animationCurve];

if (up == YES)

 {

CGFloat keyboardTop = keyboardRect.origin.y;

CGRect newTextViewFrame = textView.frame;

originalTextViewFrame = textView.frame;

newTextViewFrame.size.height = keyboardTop - textView.frame.origin.y - 10;

textView.frame = newTextViewFrame;

}

 else 

{

textView.frame = originalTextViewFrame;

}

[UIView commitAnimations];

}