keyboardWillShow not responding

Question

这里是问题，当我调试我的程序时，我发现keyboardWillShow函数没有响应每次。只是第一次，它会被程序调用。这里是我的代码，我不知道我的代码有什么问题，但是，当键盘第一次出现时，该函数运行良好。

- (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]; 
} 

，我记数通知

- (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]; 

} 

，并在这里

- (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]; 


} 

我辞职firstresponder删除它，这里是我的代码

- (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

请确保您有不写任何代码来删除ob服务器..... 请提供keyboardWillHide方法也....