首先我們要注冊鍵盤彈出和彈入的通知

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

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

//Code from Brett Schumann

-(void) keyboardWillShow:(NSNotification *)note{
// get keyboard size and loctaion
CGRect keyboardBounds;
[[note.userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] getValue: &keyboardBounds];
NSNumber *duration = [note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
NSNumber *curve = [note.userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey];

// Need to translate the bounds to account for rotation.
keyboardBounds = [self.view convertRect:keyboardBounds toView:nil];

// get a rect for the textView frame
CGRect btnFrame = self.editView.frame;
btnFrame.origin.y = self.view.bounds.size.height - (keyboardBounds.size.height + btnFrame.size.height);
// animations settings
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:[duration doubleValue]];
[UIView setAnimationCurve:[curve intValue]];
[UIView setAnimationDelegate:self];

// set views with new info
self.editView.frame = btnFrame;
// commit animations
[UIView commitAnimations];

}

- (void) keyboardWillHide:(NSNotification *)note{
NSNumber *duration = [note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
NSNumber *curve = [note.userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey];

// get a rect for the textView frame
CGRect btnFrame = self.editView.frame;
btnFrame.origin.y = self.view.bounds.size.height + btnFrame.size.height;

// animations settings
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:[duration doubleValue]];
[UIView setAnimationCurve:[curve intValue]];

// set views with new info
self.editView.frame = btnFrame;

// commit animations
[UIView commitAnimations];

}