怎么用 Vue 实现 Material Design的涟漪动效-守望者-AIR技术交流

破晓发表于 2016-8-3 12:43:39

怎么用 Vue 实现 Material Design的涟漪动效

<div class="article_meta" style="color: rgb(153, 153, 153); padding-bottom: 5px; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(211, 211, 211); font-family: "Helvetica Neue", Helvetica, Tahoma, Arial, STXihei, "Microsoft YaHei", 微软雅黑, sans-serif;"><div class="source">原文  <a class="cut cut70" href="http://div.io/topic/1694?utm_source=tuicool&utm_medium=referral" style="color: rgb(51, 51, 51); text-decoration: none; transition: 0.25s; outline: none 0px; overflow: hidden; white-space: nowrap; word-break: keep-all; text-overflow: ellipsis; max-width: 69%; display: inline-block;">http://div.io/topic/1694</a></div><div>主题 <a href="http://www.tuicool.com/topics/11050069" target="_blank" style="color: rgb(51, 51, 51); text-decoration: none; transition: 0.25s; outline: none 0px;"><span class="new-label" style="display: inline-block; padding: 2px 4px; font-size: 0.9em; line-height: 16px; vertical-align: baseline; white-space: nowrap; color: rgb(120, 120, 120); margin-right: 5px; background-color: rgb(242, 242, 242);">Material Design</a></div></div><div class="article_body" id="nei" style="padding: 20px 5px 25px; overflow-x: hidden; word-break: break-all; min-height: 340px; font-size: 16px; line-height: 1.7em; color: rgb(51, 51, 51); font-family: "Helvetica Neue", Helvetica, Tahoma, Arial, STXihei, "Microsoft YaHei", 微软雅黑, sans-serif;"><div style="line-height: 1.7em;"><div style="line-height: 1.7em;">「掘金·发现」是稀土圈微信公众号的一个新栏目。正如大家所知， <a href="http://gold.xitu.io/" target="_blank" rel="nofollow,noindex" style="color: rgb(148, 148, 148); text-decoration: none; transition: 0.25s; outline: none 0px; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(148, 148, 148); font-style: italic; font-weight: bold;">稀土掘金</a> 致力于挖掘最优质的互联网技术，为用户带去最优质的阅读体验。我们做这个栏目的出发点，也正是如此。掘金社区当中有趣而有用的内容，我们呈现给你。</div>在本期栏目中，来自我们 <a href="http://gold.xitu.io/" target="_blank" rel="nofollow,noindex" style="color: rgb(148, 148, 148); text-decoration: none; transition: 0.25s; outline: none 0px; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(148, 148, 148); font-style: italic; font-weight: bold;">稀土掘金</a> 的 Awe 会用个人实践经历，告诉大家如何使用 Vue 来实现 Material Design 中点击按钮产生水纹扩散的效果。第一次看到 Material Design Lite 的时候只能用惊艳来表达，原来按钮、复选框、输入框等控件还可以这样玩。有兴趣的朋友可以前往 <a href="http://www.getmdl.io/components/index.html" target="_blank" rel="nofollow,noindex" style="color: rgb(148, 148, 148); text-decoration: none; transition: 0.25s; outline: none 0px; border-bottom-width: 1px; border-bottom-style: dashed; border-bottom-color: rgb(148, 148, 148); font-style: italic; font-weight: bold;">Material Design Lite 官网</a> 了解更多详情。说了这么多，还是先上最终效果图看看怎么样吧：<img src="http://img0.tuicool.com/JJRfii.gif" class="alignCenter" style="max-width: 96%; height: 318.072px; vertical-align: middle; border: 0px none; margin-right: auto; margin-bottom: 10px; margin-left: auto; text-align: center; display: block; width: 550px;">去年的时候，我把 MDL 搬到了 Vue 里，写了一个简单的博客。这里的动效全部都是在 Vue 渲染出 DOM 之后调用 MDL 的方法来实现的。比如这段代码就是首页异步获取的文章列表数据之后调 <code style="padding: 2px 4px; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: none; background-color: rgb(247, 247, 249);">componentHandler.upgradeAllRegistered()</code><pre class="prettyprint javascript" style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 4px; margin-bottom: 1.5em; font-size: 12px; line-height: 1.5em; word-break: break-all; white-space: pre-wrap; border: 1px solid rgba(0, 0, 0, 0.14902); overflow-y: auto; background-color: rgb(246, 246, 246);"><code style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: 0px; display: block; overflow-y: auto;">asyncData: function(resolve, reject) {
this.loadPost(0,(tmp)=> {
 store.actions.hideLoading();
 resolve({
 posts: tmp
 })
 this.site.skip = 10;
 this.$nextTick(function() {
 componentHandler.upgradeAllRegistered();
 })
})
}
</code></pre><img src="http://img2.tuicool.com/n2YVRvi.gif" class="alignCenter" style="max-width: 96%; height: 247.074px; vertical-align: middle; border: 0px none; margin-right: auto; margin-bottom: 10px; margin-left: auto; text-align: center; display: block; width: 550px;">上面提到的是一个相对简单轻松的用法，但是总给人感觉不够优雅，你总得去调用那个黑盒般的方法。好在，我是一个喜欢折腾的人，还是自己来实现一下这个效果吧。Material Design 里特别吸引我的一个效果就是点击按钮之后，会有水波的涟漪从点击的中心向外扩散出去的效果。<img src="http://img1.tuicool.com/b2u22qQ.gif" class="alignCenter" style="max-width: 96%; height: 307.659px; vertical-align: middle; border: 0px none; margin-right: auto; margin-bottom: 10px; margin-left: auto; text-align: center; display: block; width: 550px;">于是，我马上打开了 Chrome 开发者工具去看看它的 DOM 结构(为了显示效果，我删掉了 Button 元素的一部分 Class)<pre class="prettyprint xml" style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 4px; margin-bottom: 1.5em; font-size: 12px; line-height: 1.5em; word-break: break-all; white-space: pre-wrap; border: 1px solid rgba(0, 0, 0, 0.14902); overflow-y: auto; background-color: rgb(246, 246, 246);"><code style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: 0px; display: block; overflow-y: auto;"><button class="mdl-button">
<i class="material-icons">add</i>
<span class="mdl-button__ripple-container">
<span class="mdl-ripple is-animating" style="width: 160.392px; height: 160.392px; transform: translate(-50%, -50%) translate(30px, 48px);">
</span>
</span>
</button>
</code></pre>看来以上代码块就是实现上文所说水波扩散效果的部分了。通过观察代码可以发现，这一效果的实现原理就是通过动态改变它的中心位置，接着将中心部分从小到大扩散的动画。先写出来我们要做的 Button 的 DOM：BUTTON我们在 Button 被点击之后给 Class 中的 .animate 属性加上 Ripple 的 CSS 3 动画代码，它就会开始扩散了。<pre class="prettyprint cs" style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 4px; margin-bottom: 1.5em; font-size: 12px; line-height: 1.5em; word-break: break-all; white-space: pre-wrap; border: 1px solid rgba(0, 0, 0, 0.14902); overflow-y: auto; background-color: rgb(246, 246, 246);"><code style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: 0px; display: block; overflow-y: auto;">.animate {
animation: ripple 0.65s linear;
}
@keyframes ripple {
100% {opacity: 0; transform: scale(2.5);}
}

reppleClick (e) {
this.repple_button.animate = true
let button = e.target
let ripple = button.querySelector('.__cov-ripple')
if (ripple) {
 //水波得是一个直径大于button最长边的正圆
 let d = Math.max(button.offsetHeight, button.offsetWidth)
 //设置它中心在鼠标点击的位置
 let x = e.layerX - ripple.offsetWidth / 2
 let y = e.layerY - ripple.offsetHeight / 2
 ripple.setAttribute('style', 'height: ' + d + 'px; width: ' + d + 'px; top: ' + y + 'px; left: ' + x + 'px;')
}
this.$nextTick(() => {
//在动画结束后移除animate
setTimeout(() => {
 this.repple_button.animate = false
 }, 660)
})
}
</code></pre>完成之后就是下面这个效果啦：<img src="http://img1.tuicool.com/ZFVJJvZ.gif" class="alignCenter" style="max-width: 96%; height: 318.072px; vertical-align: middle; border: 0px none; margin-right: auto; margin-bottom: 10px; margin-left: auto; text-align: center; display: block; width: 550px;"><h2 style="margin-bottom: 0.5em; font-family: inherit; line-height: 1.6em; color: inherit; text-rendering: optimizeLegibility; font-size: 18px; text-indent: 1em;">完整代码</h2><pre class="prettyprint xml" style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 4px; margin-bottom: 1.5em; font-size: 12px; line-height: 1.5em; word-break: break-all; white-space: pre-wrap; border: 1px solid rgba(0, 0, 0, 0.14902); overflow-y: auto; background-color: rgb(246, 246, 246);"><code style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: 0px; display: block; overflow-y: auto;"><template>
<button @click="reppleClick" :class="{active: repple_button.toggle}">
<slot></slot>
</button>
</template>
<script>
export default {
data () {
return {
repple_button: {
animate: false,
toggle: false
}
}
},
methods: {
reppleClick (e) {
this.repple_button.animate = true
let button = e.target
let ripple = button.querySelector('.__cov-ripple')
if (ripple) {
let d = Math.max(button.offsetHeight, button.offsetWidth)
let x = e.layerX - ripple.offsetWidth / 2
let y = e.layerY - ripple.offsetHeight / 2
ripple.setAttribute('style', 'height: ' + d + 'px; width: ' + d + 'px; top: ' + y + 'px; left: ' + x + 'px;')
}
this.$nextTick(() => {
setTimeout(() => {
 this.repple_button.animate = false
}, 660)
})
}
}
}
</script>
<style>
.__cov-button-ripple {
background: transparent;
border: none;
border-radius: 2px;
color: #000;
position: relative;
height: 36px;
min-width: 64px;
padding: 0 16px;
display: inline-block;
font-family: Roboto,Helvetica,Arial,sans-serif;
font-size: 14px;
font-weight: 500;
text-transform: uppercase;
line-height: 1;
letter-spacing: 0;
overflow: hidden;
will-change: box-shadow,transform;
-webkit-transition: box-shadow .2s cubic-bezier(.4,0,1,1),background-color .2s cubic-bezier(.4,0,.2,1),color .2s cubic-bezier(.4,0,.2,1);
transition: box-shadow .2s cubic-bezier(.4,0,1,1),background-color .2s cubic-bezier(.4,0,.2,1),color .2s cubic-bezier(.4,0,.2,1);
outline: none;
cursor: pointer;
text-decoration: none;
text-align: center;
line-height: 36px;
vertical-align: middle;
min-width: 96px;
}
.__cov-button-ripple:hover {
background-color: hsla(0,0%,62%,.2);
}
.__cov-ripple {
display: block;
position: absolute;
background: hsla(0, 0%, 65%, 0.66);
border-radius: 100%;
transform: scale(0);
}
.__cov-ripple.animate {
animation: ripple 0.65s linear;
}

@keyframes ripple {
100% {opacity: 0; transform: scale(2.5);}
}
</style>
</code></pre><h2 style="margin-bottom: 0.5em; font-family: inherit; line-height: 1.6em; color: inherit; text-rendering: optimizeLegibility; font-size: 18px; text-indent: 1em;">用法</h2><pre class="prettyprint xml" style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 4px; margin-bottom: 1.5em; font-size: 12px; line-height: 1.5em; word-break: break-all; white-space: pre-wrap; border: 1px solid rgba(0, 0, 0, 0.14902); overflow-y: auto; background-color: rgb(246, 246, 246);"><code style="padding: 0.3em; font-family: Monaco, Menlo, Consolas, "Courier New", monospace; border-radius: 3px; border: 0px; display: block; overflow-y: auto;"><template>
<div>
<div>资料设定</div>
<div>
某些文字
</div>
<div>

<cov-button @click="close">OK</cov-button>
</div>
</div>
</template>

<script>
import covButton from './button.vue'
export default {
components: {
covButton
}
}</code></pre></div></div>

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怎么用 Vue 实现 Material Design的涟漪动效