iOS_监测键盘的显示和隐藏变化，并获得键盘高度，改变tableView的frame和偏移

<pre name="code" class="objc"><pre name="code" class="objc">#pragma mark view将要显示时
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    //注册监听键盘显隐通知
    //键盘出现时
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShow:) name:UIKeyboardDidShowNotification object:nil];
    //键盘隐藏时
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBaHidden:) name:UIKeyboardDidHideNotification object:nil];
    //根据键盘高度 改变 输入框和表格 的位置
    [self changeInputViewTableViewPlaceWith:self.currentKeyboardHeight];
}

#pragma mark 键盘显示时
- (void)keyboardWasShow:(NSNotification *)notification {
    NSDictionary *info = [notification userInfo];
    //获得键盘尺寸
    CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

    //doing something
    self.editHeight = keyboardSize.height; //重置当前键盘高度
    //根据键盘高度 改变 输入框和表格 的位置
    [self changeInputViewTableViewPlaceWith:self.editHeight];
}

#pragma mark 键盘隐藏时
- (void)keyboardWillBaHidden:(NSNotification *)notification {

<pre name="code" class="objc">    //doing something