如何使子元素可见和不可见，维护正确的父子关系

Question

我做了一个div，它有子级，这些子级也有子级。我想当用户点击"显示"按钮时，子元素就会出现。同时将设置"隐藏"按钮而不是"显示"按钮。如果用户点击"隐藏"按钮，将会发生相反的事件。我可以成功地放入一些jQuery代码。但问题是，当任何人点击"显示"按钮时，它会显示每个子元素和子元素。但是，我希望如果用户点击"A"元素上的"显示"按钮，它只会打开A的孩子，如果他们点击A孩子上的"展示"按钮，那么只有A孩子的孩子才会出现。

这是我的工作样本：http://jsfiddle.net/learner73/PcNu2/

<div class="box">
    <ul>
        <li>
            <div class="row">
                <p class="left">A</p>
                <a href="#" class="right showButton">Show</a>
                <a href="#" class="right hideButton">Hide</a>
            </div>
            <ul class="child">
                <li>
                    <div class="row">
                        <p class="left">- A's Child 1</p>
                        <a href="#" class="right showButton">Show</a>
                        <a href="#" class="right hideButton">Hide</a>
                    </div>
                    <ul class="child child2">
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 1's child 1</p>
                            </div> 
                        </li>
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 1's child 2</p>
                            </div> 
                        </li>
                    </ul>
                </li>
                <li>
                    <div class="row">
                        <p class="left">- A's Child 2</p>
                        <a href="#" class="right showButton">Show</a>
                        <a href="#" class="right hideButton">Hide</a>
                    </div>
                    <ul class="child child2">
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 2's child 1</p>
                            </div> 
                        </li>
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 2's child 2</p>
                            </div> 
                        </li>
                    </ul>
                </li>
            </ul>
        </li>
        <li>
            <div class="row">
                <p class="left">B</p>
                <a href="#" class="right showButton">Show</a>
                <a href="#" class="right hideButton">Hide</a>
            </div>
            <ul class="child">
                <li>
                    <div class="row">
                        <p class="left">- B's Child 1</p>
                    </div>
                </li>
            </ul>
        </li>
    </ul>
</div>

Answer 1

我在每个级别中只使用一个按钮，并相应地更新：http://jsfiddle.net/sbritton/J6c3z/

<div class="box">
    <ul>
        <li>
            <div class="row">
                <p class="left">A</p>
                <a href="#" class="right showButton">Show</a>                
            </div>
            <ul class="child">
                <li>
                    <div class="row">
                        <p class="left">- A's Child 1</p>
                        <a href="#" class="right showButton">Show</a>                        
                    </div>
                    <ul class="child child2">
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 1's child 1</p>
                            </div> 
                        </li>
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 1's child 2</p>
                            </div> 
                        </li>
                    </ul>
                </li>
                <li>
                    <div class="row">
                        <p class="left">- A's Child 2</p>
                        <a href="#" class="right showButton">Show</a>                        
                    </div>
                    <ul class="child child2">
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 2's child 1</p>
                            </div> 
                        </li>
                        <li>
                            <div class="row">
                                <p class="left">- A's Child 2's child 2</p>
                            </div> 
                        </li>
                    </ul>
                </li>
            </ul>
        </li>
        <li>
            <div class="row">
                <p class="left">B</p>
                <a href="#" class="right showButton">Show</a>                
            </div>
            <ul class="child">
                <li>
                    <div class="row">
                        <p class="left">- B's Child 1</p>
                    </div>
                </li>
            </ul>
        </li>
    </ul>
</div>

$(".box").on('click','.showButton', function(){
  $(this).parent().next("ul.child").show();
  $(this).removeClass('showButton').addClass('hideButton').text('Hide');
});
$(".box").on('click','.hideButton', function(){  
  $(this).closest('li').find(".child").hide();
  $(this).closest('li').find('.hideButton').removeClass('hideButton').addClass('showButton').text('Show');
});