- (void)viewDidLoad{

[[NSNotificationCenterdefaultCenter] addObserver:self selector:@selector(keyboardDidShow:)

name:UIKeyboardDidShowNotification object:nil];

[[NSNotificationCenterdefaultCenter] addObserver:self selector:@selector(keyboardDidHide:)

name:UIKeyboardDidHideNotification object:nil];

}

- (void)keyboardDidShow:(NSNotification *)nsNotification {

NSDictionary *userInfo = [nsNotificationuserInfo];

_keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

[selfupdateTextViewSize];

}

- (void)keyboardDidHide:(NSNotification *)nsNotification {

_keyboardSize =CGSizeMake(0.0,0.0);

[selfupdateTextViewSize];

}

- (void)updateTextViewSize {

UIInterfaceOrientation orientation =

[UIApplication sharedApplication].statusBarOrientation;

CGFloat keyboardHeight = UIInterfaceOrientationIsLandscape(orientation) ? _keyboardSize.width

:_keyboardSize.height;

_textView.frame =CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - keyboardHeight);

}