UIkit3.x文档

动画

一些可以流畅运行在你的页面中的简单动画。.

用法

添加一个 .uk-animation-* 类之一添加到任何元素。 class被添加时就会显示动画，所以在页面加载之后就会立即生效。 要使动画在另一个时间点才显示，比如在元素进入视口时，你需要添加使用了 JavaScript 的class，例如 滚动监听组件 这是 UIkit 的多数组件使用动画的方式。所有动画本身都是用 CSS 实现的，不需要使用 JavaScript来播放。

Class Description
.uk-animation-fade 元素淡入
.uk-animation-scale-up
.uk-animation-scale-down 		元素逐渐淡入并按比例放大或缩小。
.uk-animation-slide-top
.uk-animation-slide-bottom .uk-animation-slide-left
.uk-animation-slide-right 		元素以其自身的高度或宽度从顶部，底部，左侧或右侧淡入并滑入。
.uk-animation-slide-top-small
.uk-animation-slide-bottom-small .uk-animation-slide-left-small
.uk-animation-slide-right-small 		元素从顶部、底部、左侧或右侧淡入并滑入，并带有固定像素值的较小距离。
.uk-animation-slide-top-medium
.uk-animation-slide-bottom-medium .uk-animation-slide-left-medium
.uk-animation-slide-right-medium 		元素从顶部、底部、左侧或右侧淡入并滑入，并带有固定像素值的中等距离。
.uk-animation-kenburns 元素会非常缓慢地向上缩放，并且不会消失。
.uk-animation-shake 元素抖动
.uk-animation-stroke 绘制SVG元素笔划。

要在鼠标悬停或处于焦点时切换动画，请将 .uk-animation-toggle 类添加到父元素。还可以添加 tabindex="0" 以使动画可通过键盘导航和触摸设备使动画聚焦。 

<div class="uk-animation-toggle" tabindex="0">
    <div class="uk-animation-fade"></div>
</div>

  • Fade

    Scale Up

    Scale Down

    Shake

    Left

    Top

    Bottom

    Right

    Left Small

    Top Small

    Bottom Small

    Right Small

    Left Medium

    Top Medium

    Bottom Medium

    Right Medium

  • <div class="uk-child-width-1-2 uk-child-width-1-4@s uk-grid-match" uk-grid>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-fade">
            <p class="uk-text-center">Fade</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-up">
            <p class="uk-text-center">Scale Up</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-down">
            <p class="uk-text-center">Scale Down</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-shake">
            <p class="uk-text-center">Shake</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left">
            <p class="uk-text-center">Left</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top">
            <p class="uk-text-center">Top</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom">
            <p class="uk-text-center">Bottom</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right">
            <p class="uk-text-center">Right</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left-small">
            <p class="uk-text-center">Left Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top-small">
            <p class="uk-text-center">Top Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom-small">
            <p class="uk-text-center">Bottom Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right-small">
            <p class="uk-text-center">Right Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left-medium">
            <p class="uk-text-center">Left Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top-medium">
            <p class="uk-text-center">Top Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom-medium">
            <p class="uk-text-center">Bottom Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right-medium">
            <p class="uk-text-center">Right Medium</p>
        </div>
    </div>
</div>

反向动画

默认地，所有动画都是元素出现的效果。要把动画反向，请添加 .uk-animation-reverse 类.

<div class="uk-animation-fade uk-animation-reverse"></div>

  • Fade

    Scale Up

    Scale Down

    Shake

    Left

    Top

    Bottom

    Right

    Left Small

    Top Small

    Bottom Small

    Right Small

    Left Medium

    Top Medium

    Bottom Medium

    Right Medium

  • <div class="uk-child-width-1-2 uk-child-width-1-4@s uk-grid-match" uk-grid>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-fade uk-animation-reverse">
            <p class="uk-text-center">Fade</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-up uk-animation-reverse">
            <p class="uk-text-center">Scale Up</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-down uk-animation-reverse">
            <p class="uk-text-center">Scale Down</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-shake uk-animation-reverse">
            <p class="uk-text-center">Shake</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left uk-animation-reverse">
            <p class="uk-text-center">Left</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top uk-animation-reverse">
            <p class="uk-text-center">Top</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom uk-animation-reverse">
            <p class="uk-text-center">Bottom</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right uk-animation-reverse">
            <p class="uk-text-center">Right</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left-small uk-animation-reverse">
            <p class="uk-text-center">Left Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top-small uk-animation-reverse">
            <p class="uk-text-center">Top Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom-small uk-animation-reverse">
            <p class="uk-text-center">Bottom Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right-small uk-animation-reverse">
            <p class="uk-text-center">Right Small</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-left-medium uk-animation-reverse">
            <p class="uk-text-center">Left Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-top-medium uk-animation-reverse">
            <p class="uk-text-center">Top Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-bottom-medium uk-animation-reverse">
            <p class="uk-text-center">Bottom Medium</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-slide-right-medium uk-animation-reverse">
            <p class="uk-text-center">Right Medium</p>
        </div>
    </div>
</div>

快速动画

要以更快的速度播放动画，请将 .uk-animation-fast 类添加到元素。

<div class="uk-animation-fade uk-animation-fast"></div>

  • Fade

  • <div class="uk-width-1-3@s">
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-fast uk-animation-fade">
            <p class="uk-text-center">Fade</p>
        </div>
    </div>
</div>

动画起点

默认情况下，缩放动画从中心开始。 若要修改此行为，请从实用效果组件中添加 .uk-transform-origin-* 类之一。 

<div class="uk-animation-scale-up uk-transform-origin-bottom-right"></div>

  • Bottom Right

    Top Center

    Bottom Center

  • <div class="uk-child-width-1-3@s" uk-grid>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-up uk-transform-origin-bottom-right">
            <p class="uk-text-center">Bottom Right</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-up uk-transform-origin-top-center">
            <p class="uk-text-center">Top Center</p>
        </div>
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <div class="uk-card uk-card-default uk-card-body uk-animation-scale-up uk-transform-origin-bottom-center">
            <p class="uk-text-center">Bottom Center</p>
        </div>
    </div>
</div>

Ken Burns

要添加简单的Ken Burns效果，请将 .uk-animation-kenburns 类添加到图像。 您还可以使用 实用效果组件中的 .uk-animation-reverse 或 .uk-transform-origin-* 其中之一来修改效果。 

<img class="uk-animation-kenburns" src="" alt="">

默认情况下，动画在页面加载后就开始播放。 在此示例中，我们使用滚动监听 组件，这样图片在进入视口时才触发动画效果。

  • Example image
  • <div class="uk-child-width-1-2@s uk-grid-small" uk-grid>
    <div>
        <div class="uk-overflow-hidden">
            <img src="/skin/ukv3/images/dark.jpg" alt="Example image" uk-scrollspy="cls: uk-animation-kenburns; repeat: true">
        </div>
    </div>
    <div>
        <div class="uk-overflow-hidden">
            <img src="/skin/ukv3/images/dark.jpg" alt="Example image" class="uk-animation-reverse uk-transform-origin-top-right" uk-scrollspy="cls: uk-animation-kenburns; repeat: true">
        </div>
    </div>
</div>

SVG 笔划

动画组件可用于为SVG笔画设置动画。 效果看起来像SVG在您的眼前绘制笔划。 SVG图像必须作为嵌入式SVG注入到标记中。 这可以手动完成，也可以使用 SVG 组件完成。

以下示例显示了如何手动添加嵌入式SVG。由于您必须知道笔触的确切长度，因此UIkit要求您在自定义属性 --uk-animation-stroke中设置长度。 在本例中，笔划长度为46。

<svg class="uk-animation-stroke" style="--uk-animation-stroke: 46;" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
    <path fill="none" stroke="#000" stroke-width="1" d=""/>
</svg>

还有一种更为简单的方法是将uk-svg="stroke-animation: true"添加到图像元素来使用 SVG 组件。 它将计算笔划长度并自动添加 --uk-animation-stroke 自定义属性。

<img src="" uk-svg="stroke-animation: true">
  • <div class="uk-child-width-1-2@m uk-text-center" uk-grid>
    <div class="uk-animation-toggle" tabindex="0">
        <img class="uk-animation-stroke" width="400" height="400" src="images/strokes.svg" alt="" uk-svg="stroke-animation: true">
    </div>
    <div class="uk-animation-toggle" tabindex="0">
        <img class="uk-animation-stroke uk-animation-reverse" width="400" height="400" src="images/strokes.svg" alt="" uk-svg="stroke-animation: true">
    </div>
</div>