在KeyboardWillShow

Question

由于某些原因，我的观点不是动画：

- (void)keyboardWillShow:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    double duration = [[info objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    int curve = [[info objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue];

    int height = self.view.bounds.size.height - kbSize.height+self.tabBarController.tabBar.frame.size.height;
    self.notesView.frame = CGRectMake(0, -height, 
    self.view.bounds.size.width, height);
    [UIView animateWithDuration:1.5 delay:0 options:curve animations:^{
        self.notesView.frame = CGRectMake(0, 0, self.view.bounds.size.width, height);
    } completion:nil];
}

正在显示notesView但未动画。当我将动画代码移动到btnPressed方法时，它会按预期动画。有什么想法吗？

修改 看起来这个方法被调用了两次（这是一个处理inputAccessoryView的单独问题，我仍然需要弄清楚）。我更新了它，看看只调用animateWithDuration代码一次是否能解决问题。但是，它仍然没有动画。

- (void)keyboardWillShow:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    int curve = [[info objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue];
    int height = self.view.bounds.size.height - kbSize.height + self.tabBarController.tabBar.frame.size.height;
    if (height == 510) return; //for some reason the self.view.bounds.size.height is different between the two calls
    self.notesView.frame = CGRectMake(0, -height, self.view.bounds.size.width, height);
    [UIView animateWithDuration:1.5 delay:0 options:curve animations:^{
        self.notesView.frame = CGRectMake(0, 0, self.view.bounds.size.width, height);
    } completion:nil];
}