tecladoWillShow no responde

Question

aquí hay un problema, cuando depuro mi programa, encontré que la función keyboardWillShow no responde siempre. solo la primera vez, se llamará por programa. aquí está mi código, no sé cuál está mal en mi código, pero, cuando apareció el teclado por primera vez, la función funciona bien.

- (void)keyboardWillShow:(NSNotification *)notification { 

    /* 
    Reduce the size of the text view so that it's not obscured by the keyboard. 
    Animate the resize so that it's in sync with the appearance of the keyboard. 
    */ 


    NSDictionary *userInfo = [notification userInfo]; 

    // Get the origin of the keyboard when it's displayed. 
    NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]; 

    // Get the top of the keyboard as the y coordinate of its origin in self's view's coordinate system. The bottom of the text view's frame should align with the top of the keyboard's final position. 
    CGRect keyboardRect = [aValue CGRectValue]; 
    keyboardRect = [self.view convertRect:keyboardRect fromView:nil]; 

    CGFloat keyboardTop = keyboardRect.origin.y; 
    CGRect newTextViewFrame = self.textview.frame; 

    newTextViewFrame.size.height = keyboardTop - self.view.bounds.origin.y; 

    // Get the duration of the animation. 
    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]; 
    NSTimeInterval animationDuration; 
    [animationDurationValue getValue:&animationDuration]; 

    // Animate the resize of the text view's frame in sync with the keyboard's appearance. 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:animationDuration]; 

    textview.frame = newTextViewFrame; 

    [UIView commitAnimations]; 
} 
- (void)keyboardWillHide:(NSNotification *)notification { 

    NSDictionary* userInfo = [notification userInfo]; 

    /* 
    Restore the size of the text view (fill self's view). 
    Animate the resize so that it's in sync with the disappearance of the keyboard. 
    */ 
    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]; 
    NSTimeInterval animationDuration; 
    [animationDurationValue getValue:&animationDuration]; 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:animationDuration]; 

// textview.frame = self.view.bounds; 
    [self save]; 

    [UIView commitAnimations]; 
} 

y yo notificación regist

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 

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

} 

y sacarlo aquí

- (void)viewDidUnload 
{ 
    [super viewDidUnload]; 
    [self save]; 
    self.textview = nil; 
    self.title = nil; 
    self.tags = nil; 
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil]; 


} 

i resigno firstresponder, aquí es mi código

- (IBAction)save:(id)sender { 
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addNote)] autorelease]; 

    [textview resignFirstResponder]; 


} 

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{ 
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(save:)] autorelease]; 
    [self setUpUndoManager]; 

    return YES; 


} 

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{ 
    [self save]; 
    return YES; 

} 

Answer 1

Asegúrese de que usted está no escribir ningún código para eliminar ob servidor ..... Indique el método keyboardWillHide también ....