uTools-Manuals/docs/jQuery/slideDown.html
2019-04-21 11:50:48 +08:00

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<article class="" id="post-">
<header class="entry-header">
<h1 class="entry-title">.slideDown()</h1>
<div class="entry-meta">
所属分类:<span class="category"><a href="/category/effects/">特效</a> &gt; <a href="/category/effects/sliding/">滑动</a></span>
<span class="pull-right">英文文档:<a href="https://api.jquery123.com/slideDown/" target="_blank">.slideDown()</a></span>
</div><!-- .entry-meta -->
</header><!-- .entry-header -->
<!-- .entry-header -->
<div class="entry-content">
<article class="entry method" id="slideDown1">
<h2 class="section-title"> <span class="name">.slideDown( [duration ] [, complete ] )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span> </h2>
<div class="entry-wrapper">
<p class="desc"><strong>描述: </strong>用滑动动画显示一个匹配元素。</p>
<ul class="signatures">
<li class="signature" id="slideDown-duration-complete">
<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.slideDown( [duration ] [, complete ] )</h4>
<ul>
<li>
<div> <strong>duration</strong> (默认: <code>400</code>)</div>
<div>类型: <a href="/Types/#Number">Number</a> or <a href="/Types/#String">String</a> </div>
<div>一个字符串或者数字决定动画将运行多久。</div>
</li>
<li>
<div><strong>complete</strong></div>
<div>类型: <a href="/Types/#Function">Function</a>()</div>
<div>在动画完成时执行的函数。</div>
</li>
</ul>
</li>
<li class="signature" id="slideDown-options">
<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.slideDown( options )</h4>
<ul>
<li>
<div><strong>options</strong></div>
<div>类型: <a href="/Types/#PlainObject">PlainObject</a>
</div>
<div>一组包含动画选项的值的集合。 支持的选项:</div>
<ul>
<li>
<div>
<strong>duration</strong> (default: <code>400</code>)
</div>
<div>Type: <a href="http://api.jquery.com/Types/#Number">Number</a> or <a href="http://api.jquery.com/Types/#String">String</a>
</div>
<div>一个字符串或者数字决定动画将运行多久。(注:默认值: "normal" 三种预定速度的字符串("slow", "normal", 或
"fast")或表示动画时长的毫秒数值(如1000)
</div>
</li>
<li>
<div>
<strong>easing</strong> (default: <code>swing</code>)
</div>
<div>Type: <a href="http://api.jquery.com/Types/#String">String</a>
</div>
<div>一个字符串表示过渡使用哪种缓动函数。jQuery自身提供"linear" 和 "swing",其他效果可以使用<a href="http://gsgd.co.uk/sandbox/jquery/easing/">jQuery Easing Plugin</a>插件)
</div>
</li>
<li>
<div>
<strong>queue</strong> (default: <code>true</code>)
</div>
<div>Type: <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> or <a href="http://api.jquery.com/Types/#String">String</a>
</div>
<div>
一个布尔值指示是否将动画放置在效果队列中。如果为false时将立即开始动画。 <strong>从jQuery1.7开始</strong>,队列选项也可以接受一个字符串,在这种情况下,在动画被添加到由该字符串表示的队列中。当一个自定义的队列名称被使用,动画不会自动启动;你必须调用<code>.dequeue("queuename")</code>来启动它。
</div>
</li>
<li>
<div><strong>specialEasing</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#PlainObject">PlainObject</a>
</div>
<div>一组一个或多个通过相应的参数和相对简单函数定义的CSS属性 ( <a href="/category/version/1.4/">1.4</a> 新增)
</div>
</li>
<li>
<div><strong>step</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Number">Number</a> now, <a href="http://api.jquery.com/Types/#Tween">Tween</a> tween )
</div>
<div>
每个动画元素的每个动画属性将调用的函数。这个函数为修改Tween 对象提供了一个机会来改变设置中得属性值。
</div>
</li>
<li>
<div><strong>progress</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Number">Number</a> progress, <a href="http://api.jquery.com/Types/#Number">Number</a> remainingMs )
</div>
<div>
每一步动画完成后调用的一个函数,无论动画属性有多少,每个动画元素都执行单独的函数。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
</div>
</li>
<li>
<div><strong>complete</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>()</div>
<div>在动画完成时执行的函数。</div>
</li>
<li>
<div><strong>done</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
</div>
<div>在动画完成时执行的函数。 (他的Promise对象状态已完成).<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
</div>
</li>
<li>
<div><strong>fail</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
</div>
<div>
动画失败完成时执行的函数。(他的Promise对象状态未完成)。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
</div>
</li>
<li>
<div><strong>always</strong></div>
<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
</div>
<div>
在动画完成或未完成情况下停止时执行的函数。(他的Promise对象状态已完成或未完成)。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
</div>
</li>
</ul>
</li>
</ul>
</li>
<li class="signature" id="slideDown-duration-easing-complete">
<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.4.3/">1.4.3</a></span>.slideDown( [duration ] [, easing ] [, complete ] )</h4>
<ul>
<li>
<div> <strong>duration</strong> (默认: <code>400</code>)</div>
<div>类型: <a href="/Types/#Number">Number</a> or <a href="/Types/#String">String</a> </div>
<div>一个字符串或者数字决定动画将运行多久。</div>
</li>
<li>
<div> <strong>easing</strong> (默认: <code>swing</code>)</div>
<div>类型: <a href="/Types/#String">String</a> </div>
<div>一个字符串表示过渡使用哪种缓动函数。译者注jQuery自身提供"linear" 和 "swing",其他可以使用相关的插件)</div>
</li>
<li>
<div><strong>complete</strong></div>
<div>类型: <a href="/Types/#Function">Function</a>()</div>
<div>在动画完成时执行的函数。</div>
</li>
</ul>
</li>
</ul>
<div class="longdesc" id="entry-longdesc">
<p><code>.slideDown()</code>方法将给匹配元素的高度的动画,这会导致页面的下面部分滑下去,弥补了显示的方式。</p>
<p>持续时间duration是以毫秒为单位的数值越大动画越慢不是越快。字符串 <code>'fast'</code><code>'slow'</code> 分别代表200和600毫秒的延时。如果提供任何其他字符串或者这个duration参数被省略那么默认使用<code>400</code> 毫秒的延时。</p>
<p>我们可以给任何元素做动画,比如一个简单的图片:</p>
<div class="syntaxhighlighter xml nogutter">
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<td class="code"><pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">id</span>=<span class="value">"clickme"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> Click here</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">img</span> <span class="attribute">id</span>=<span class="value">"book"</span> <span class="attribute">src</span>=<span class="value">"book.png"</span> <span class="attribute">alt</span>=<span class="value">""</span> <span class="attribute">width</span>=<span class="value">"100"</span> <span class="attribute">height</span>=<span class="value">"123"</span> /&gt;</span></code></div></div>
</pre></td>
</tr>
</tbody>
</table>
</div>
<p>最初是隐藏的元素,我们可以慢慢显示:</p>
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<td class="code"><pre><div class="container"><div class="line"><code>$(<span class="string">'#clickme'</span>).click(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> $(<span class="string">'#book'</span>).slideDown(<span class="string">'slow'</span>, <span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> <span class="comment">// Animation complete.</span></code></div></div><div class="container"><div class="line"><code> });</code></div></div><div class="container"><div class="line"><code>});</code></div></div>
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<p class="image four-across"> <img alt="" src="/resources/0042_06_17.png"/> <img alt="" src="/resources/0042_06_18.png"/> <img alt="" src="/resources/0042_06_19.png"/> <img alt="" src="/resources/0042_06_20.png"/> </p>
<h4 id="easing">Easing(缓冲函数)</h4>
<p><strong>从jQuery 1.4.3开始</strong>,一个可选的字符串类型的easing参数用于确定使用的缓冲函数。缓动函数指定用于动画进行中在不同点位的速度。jQuery默认只提供两个缓冲效果调用 <code>swing</code>, 在一个恒定的速度进行;调用 <code>linear</code>. 更多的缓动函数要使用的插件,最显着的是<a href="http://jqueryui.com/">jQuery UI suite</a>(译者注:或<a href="http://gsgd.co.uk/sandbox/jquery/easing/">jQuery Easing Plugin</a>插件)。</p>
<h4 id="callback-function">Callback Function回调函数</h4>
<p>如果提供回调函数参数,<code>callback</code>会在动画完成的时候调用。将不同的动画串联在一起按顺序排列执行是非常有用的。这个回调函数不设置任何参数,但是<code>this</code>会设成将要执行动画的那个DOM元素如果多个元素一起做动画效果那么要非常注意回调函数会在每一个元素执行完动画后都执行一次而不是这组动画整体才执行一次。</p>
<p><strong>从jQuery 1.6开始</strong><code><a href="/promise">.promise()</a></code>方法可以用来配合<code><a href="/deferred.done">deferred.done()</a></code> 方法一起使用,用于当所有匹配的元素执行完各自的动画后,再调用一个回调函数。( 查看 <a href="/promise">.promise() 例子</a> )。</p>
</div>
<h3>Additional Notes(其他注意事项):</h3>
<div class="longdesc">
<ul>
<li>所有jQuery效果包括<code>.slideDown()</code>,都能通过设置<code>jQuery.fx.off = true</code>全局的关闭效果等同于将动画持续时间duration )参数设置成 0。更多信息查看 <a href="/jquery.fx.off">jQuery.fx.off</a></li>
<li>
如果<code>.slideDown()</code>被一个无序列表(<code>&lt;ul&gt;</code>)调用并且<code>&lt;li&gt;</code>元素有定位属性position:relative, absolute, 或者 fixed这个效果在IE6至IE9以下可能无法正常工作为了解决这个问题<code>&lt;ul&gt;</code>需要触发"haslayout"。<code>ul</code>元素上添加<code>position: relative;</code><code>zoom: 1;</code>CSS声明。
</li>
</ul>
</div>
<section class="entry-examples" id="entry-examples">
<header>
<h2 class="underline">例子:</h2>
</header>
<div class="entry-example" id="example-0">
<h4>Example: <span class="desc">用 600 毫秒让所有的 div 下滑显示出来。</span> </h4>
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<td class="code"><pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code><span class="tag">div</span> <span class="rules">{ <span class="rule"><span class="attribute">background</span>:<span class="value"><span class="hexcolor">#de9a44</span>;</span></span> <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">3</span>px;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">80</span>px;</span></span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">height</span>:<span class="value"><span class="number">40</span>px;</span></span> <span class="rule"><span class="attribute">display</span>:<span class="value">none;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> Click me!</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(document.body).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code><span class="keyword">if</span> ($(<span class="string">"div:first"</span>).is(<span class="string">":hidden"</span>)) {</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).slideDown(<span class="string">"slow"</span>);</code></div></div><div class="container"><div class="line"><code>} <span class="keyword">else</span> {</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).hide();</code></div></div><div class="container"><div class="line"><code>}</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div>
</pre></td>
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<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div>
<div class="entry-example" id="example-1">
<h4>Example: <span class="desc">用 1000 毫秒让所有文本框组件下滑显示出来。动画完成后改变这些文本框的外观,并让中间的文本框获得输入焦点。</span> </h4>
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<td class="code"><pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code><span class="tag">div</span> <span class="rules">{ <span class="rule"><span class="attribute">background</span>:<span class="value"><span class="hexcolor">#cfd</span>;</span></span> <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">3</span>px;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">50</span>px;</span></span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">text-align</span>:<span class="value">center;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span> <span class="rule"><span class="attribute">cursor</span>:<span class="value">pointer;</span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">border</span>:<span class="value"><span class="number">2</span>px outset black;</span></span> <span class="rule"><span class="attribute">font-weight</span>:<span class="value">bolder;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag">input</span> <span class="rules">{ <span class="rule"><span class="attribute">display</span>:<span class="value">none;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">120</span>px;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">10</span>px;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span>Push!<span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> /&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> <span class="attribute">class</span>=<span class="value">"middle"</span> /&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> /&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code>$(<span class="keyword">this</span>).css({ borderStyle:<span class="string">"inset"</span>, cursor:<span class="string">"wait"</span> });</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"input"</span>).slideDown(<span class="number">1000</span>,<span class="keyword">function</span>(){</code></div></div><div class="container"><div class="line"><code>$(<span class="keyword">this</span>).css(<span class="string">"border"</span>, <span class="string">"2px red inset"</span>)</code></div></div><div class="container"><div class="line"><code>.filter(<span class="string">".middle"</span>)</code></div></div><div class="container"><div class="line"><code> .css(<span class="string">"background"</span>, <span class="string">"yellow"</span>)</code></div></div><div class="container"><div class="line"><code> .focus();</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).css(<span class="string">"visibility"</span>, <span class="string">"hidden"</span>);</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div>
</pre></td>
</tr>
</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div>
</section>
</div>
</article>
</div>
</article>