javascript - Bootstrap scrollspy 在选项卡内不起作用？

Question

下面是我的代码，但我知道它没有任何问题，因为当你把它从选项卡中取出时它工作正常。也没有重复的 ID，我认为这可能是导致问题的原因。无论如何，如果有人有任何想法或解决方法，那就太好了!

<div id="sampleNavbar" class="navbar navbar-static">
    <div class="navbar-inner">
        <div class="container" style="width: auto;">
            <a class="brand" href="#">Project Name</a>
            <ul class="nav">
                <li><a href="#PA">PA</a></li>
                <li><a href="#VT">VT</a></li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                        <li><a href="#uno">uno</a></li>
                        <li><a href="#dos">dos</a></li>
                        <li class="divider"></li>
                        <li><a href="#tres">tres</a></li>
                    </ul>
                </li>
            </ul>
        </div>
    </div>
</div>
<div id="scrollspy-example" data-spy="scroll" data-target="#sampleNavbar" data-offset="300" style="height: 200px; overflow-y: scroll;">
    <h4 id="PA">PA</h4>
    <p>Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg hoodie minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.
    </p>
    <h4 id="VT">VT</h4>
    <p>Veniam marfa mustache skateboard, adipisicing fugiat velit pitchfork beard. Freegan beard aliqua cupidatat mcsweeney's vero. Cupidatat four loko nisi, ea helvetica nulla carles. Tattooed cosby sweater food truck, mcsweeney's quis non freegan vinyl. Lo-fi wes anderson +1 sartorial. Carles non aesthetic exercitation quis gentrify. Brooklyn adipisicing craft beer vice keytar deserunt.
    </p>
    <h4 id="uno">uno</h4>
    <p>Occaecat commodo aliqua delectus. Fap craft beer deserunt skateboard ea. Lomo bicycle rights adipisicing banh mi, velit ea sunt next level locavore single-origin coffee in magna veniam. High life id vinyl, echo park consequat quis aliquip banh mi pitchfork. Vero VHS est adipisicing. Consectetur nisi DIY minim messenger bag. Cred ex in, sustainable delectus consectetur fanny pack iphone.
    </p>
    <h4 id="dos">dos</h4>
    <p>In incididunt echo park, officia deserunt mcsweeney's proident master cleanse thundercats sapiente veniam. Excepteur VHS elit, proident shoreditch +1 biodiesel laborum craft beer. Single-origin coffee wayfarers irure four loko, cupidatat terry richardson master cleanse. Assumenda you probably haven't heard of them art party fanny pack, tattooed nulla cardigan tempor ad. Proident wolf nesciunt sartorial keffiyeh eu banh mi sustainable. Elit wolf voluptate, lo-fi ea portland before they sold out four loko. Locavore enim nostrud mlkshk brooklyn nesciunt.
    </p>
    <h4 id="tres">tres</h4>
    <p>Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg hoodie minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.
    </p>
    <p>Keytar twee blog, culpa messenger bag marfa whatever delectus food truck. Sapiente synth id assumenda. Locavore sed helvetica cliche irony, thundercats you probably haven't heard of them consequat hoodie gluten-free lo-fi fap aliquip. Labore elit placeat before they sold out, terry richardson proident brunch nesciunt quis cosby sweater pariatur keffiyeh ut helvetica artisan. Cardigan craft beer seitan readymade velit. VHS chambray laboris tempor veniam. Anim mollit minim commodo ullamco thundercats.
    </p>
</div>        

Answer 1

这不是 Bootstrap 中的错误。发生的事情是，当您的页面加载时，带有 scrollspy 元素的选项卡被隐藏。因此，当 scrollspy 插件试图找到 $.position()每个 <h4 id="foo">在你的滚动 div 中，他们调用 return {top: 0, left: 0} .这就是为什么您在滚动时会看到闪烁的原因；该插件认为您所有的滚动目标都在同一位置。

如果您查看 documentation for the scrollspy plugin ，你会看到它提到如果你在 DOM 中添加或删除元素，你需要调用 .scrollspy('refresh')函数，以便插件可以重新评估各种滚动目标的位置。

也就是说，您需要做的是等到包含 scrollspy 内容的选项卡加载完毕，然后调用刷新函数，就像这样。请注意，我还将所有单独的点击处理程序合并为一个处理程序

$(function(){
    $('.nav-tabs li a').click(function(e) {
        e.preventDefault();
        $(this).tab('show');

        // If we are showing the scrollspy tab, let the
        // plugin refresh itself so it can function properly
        if(this.id === 'scrotab') {
            $(this).on('shown',function(){ 
                $('#scrollspy-example').scrollspy('refresh'); 
            });
        }
    });
});

此外，而不是使用 data-offset="300"您的 <div id="scrollspy-example"> 上的属性元素，你需要设置 position元素到 relative使用 CSS:

#scrollspy-example {
    position: relative;
}

这是一个有效的 jsFiddle 演示:

http://jsfiddle.net/GyMYE/3/