鍵盤上附加個textField

沒有使用inputAccessoryView。
我是自己創建一個custom的UIView，裏面放了UITextField等控件。
實現的是類似iPhone短信那個界面，點擊下部UITextField編輯區域，彈出keyboard的東東。
思路是，你要監聽keyboard的Notification，通過獲取keyboard的frame，來調整裝有UITextField的那個UIView的frame，然後用animation
註冊通知：
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

具體調整位置：

- (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 *boundsValue = [userInfo objectForKey:UIKeyboardBoundsUserInfoKey];
    CGRect keyboardRect = [boundsValue CGRectValue];
    // This UIKeyboardBoundsUserInfoKey returns CGRect won't be auto adapt to the interface orientation changes
    // We should exchange the width and height manually
    if (keyboardRect.size.width < keyboardRect.size.height) 
    {
        float tempHeight = keyboardRect.size.height;
        keyboardRect.size.height = keyboardRect.size.width;
        keyboardRect.size.width = tempHeight;
    }
    // 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.
    CGFloat keyboardTop = self.view.frame.size.height - keyboardRect.size.height;
    CGRect bottomViewFrame = bottomView.frame;
    
    bottomViewFrame.origin.y = keyboardTop - bottomViewFrame.size.height;
    // 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];
    bottomView.frame = bottomViewFrame;
    [UIView commitAnimations];
    keyBoardIsUp = YES;
    CGRect tableViewFrame = listTableView.frame;
    tableViewFrame.size.height = bottomViewFrame.origin.y - self.view.frame.origin.y;
    listTableView.frame = tableViewFrame;    
    if (listTableView.contentSize.height > bottomViewFrame.origin.y)
    {
        listTableView.contentOffset = CGPointMake(0.0f, listTableView.contentSize.height - bottomViewFrame.origin.y);
    }
}


- (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.
     */
    CGRect bottomViewFrame = bottomView.frame;
    bottomViewFrame.origin.y = self.view.frame.size.height - bottomViewFrame.size.height;
    
    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;
    [animationDurationValue getValue:&animationDuration];
    
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:animationDuration];
    bottomView.frame = bottomViewFrame;
    [UIView commitAnimations];
    listTableView.frame = CGRectMake(self.listTableView.frame.origin.x, self.listTableView.frame.origin.y,listTableView.frame.size.width, self.view.frame.size.height - bottomView.frame.size.height);
    if (listTableView.contentSize.height > listTableView.frame.size.height) 
    {
        self.listTableView.contentOffset = CGPointMake(0.0f, listTableView.contentSize.height - listTableView.frame.size.height);
    }
    self.keyBoardIsUp = NO;
}

最後記得註銷通知：
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];