[[NSNotificationCenter defaultCenter] addObserver:self                                              selector:@selector(keyboardWillShow:)                                                  name:UIKeyboardWillShowNotification                                                object:nil];         [[NSNotificationCenter defaultCenter] addObserver:self                                              selector:@selector(keyboardShow:)                                                  name:UIKeyboardDidShowNotification                                                object:nil];         [[NSNotificationCenter defaultCenter] addObserver:self                                              selector:@selector(keyboardWillHide:)                                                  name:UIKeyboardWillHideNotification                                                object:nil];         [[NSNotificationCenter defaultCenter] addObserver:self                                              selector:@selector(keyboardHide:)                                                  name:UIKeyboardDidHideNotification                                                object:nil];

- (void)keyboardWillShow:(NSNotification *)notif {     if (self.hidden == YES) {         return;     }         CGRect rect = [[notif.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];     CGFloat y = rect.origin.y;     [UIView beginAnimations:nil context:nil];     [UIView setAnimationDuration:0.25];     NSArray *subviews = [self subviews];     for (UIView *sub in subviews) {                 CGFloat maxY = CGRectGetMaxY(sub.frame);         if (maxY > y - 2) {             sub.center = CGPointMake(CGRectGetWidth(self.frame)/2.0, sub.center.y - maxY + y - 2);         }     }     [UIView commitAnimations]; } - (void)keyboardShow:(NSNotification *)notif {     if (self.hidden == YES) {         return;     } } - (void)keyboardWillHide:(NSNotification *)notif {     if (self.hidden == YES) {         return;     }     [UIView beginAnimations:nil context:nil];     [UIView setAnimationDuration:0.25];     NSArray *subviews = [self subviews];     for (UIView *sub in subviews) {         if (sub.center.y < CGRectGetHeight(self.frame)/2.0) {             sub.center = CGPointMake(CGRectGetWidth(self.frame)/2.0, CGRectGetHeight(self.frame)/2.0);         }     }     [UIView commitAnimations]; } - (void)keyboardHide:(NSNotification *)notif {     if (self.hidden == YES) {         return;     } }

NS_CLASS_AVAILABLE_IOS(2_0) @interface UITextView : UIScrollView<UITextInput> @protocol UITextInput<UIKeyInput> @protocol UIKeyInput <UITextInputTraits> - (BOOL)hasText; - (void)insertText:(NSString *)text; - (void)deleteBackward; @end