Material Design的按钮,涟漪效果

CPLBill 5年前
   <p>写在前面:<br> 这是一篇菜鸟的学习笔记,记录实现过程中的难点,没有考虑兼容、性等问题。供新手参考,也希望前辈们指点。</p>    <h3><strong>编写过程记录:</strong></h3>    <p>写个涟漪效果真的折腾了好几天。唉,毕竟没有系统学过js、jquery、css。这个过程中的@KeyFrames也是摸索了几天,遇到各种低级错误。</p>    <h3><strong>大体思路:</strong></h3>    <p>涟漪效果实际上就是一个扩展开的圆形div。鼠标点击按钮记录其坐标,通过相关计算得出产生涟漪的div坐标。然后将该div放置好后开启展开动画如此而已。</p>    <h3><strong>效果描述:</strong></h3>    <p>直接看动画吧。</p>    <p style="text-align:center"><img src="https://simg.open-open.com/show/b7d63b4df5a7bf9b07385c1b4169a339.gif"></p>    <p style="text-align:center">waves.gif</p>    <h3><strong>代码要点:</strong></h3>    <ul>     <li> <p>用这个方法来得到鼠标点击坐标:</p> <pre>  <code class="language-javascript">$(".waves").mousedown(function(e) {})</code></pre> </li>     <li> <p>得到当前按钮的涟漪div:</p> <pre>  <code class="language-javascript">var wavesDiv = box.find("div");</code></pre> </li>     <li> <p>css3动画的定义:</p> <pre>  <code class="language-javascript">@keyframes animation-definition {          from{              transform: scale(0.1);              opacity: 1;        }            to{              transform: scale(2); /*因为涟漪的大小为标签的最长边,为了保证点击标签边缘时,涟漪也能覆盖整个标签,scale值最小应为2*/            opacity: 0;                    }     }</code></pre> </li>     <li>将动画“当作”css样式 <pre>  <code class="language-javascript">.waves-effect-animation{        animation: animation-definition 1s ease-out;          /*兼容各大浏览器*/        -moz-animation: animation-definition 1s ease-out;          -webkit-animation: animation-definition 1s ease-out;          -o-animation: animation-definition 1s ease-out;      }</code></pre> </li>     <li>js中使用动画 <pre>  <code class="language-javascript">//设置涟漪div样式,准备播放动画        wavesDiv.css({            width: wH,            height: wH,            left: nX,            top: nY        }).addClass("waves-effect-animation");//播放动画</code></pre> </li>    </ul>    <h3><strong>完整代码:</strong></h3>    <pre>  <code class="language-javascript"><html>  <head>  <meta charset="utf-8">  <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>  <script type="text/javascript">  $(document).ready(function(){        $(".waves").mousedown(function(e) {            var box = $(this);              var wavesDiv = box.find("div");            //第一次没有涟漪div,动态生成          if(wavesDiv[0] == null){              var div = "<div class='waves-effect'></div>";              box.append(div);              wavesDiv = box.find("div");          }              //设置按钮样式为’waves-effect‘即去掉动画样式’waves-effect-animation‘          wavesDiv[0].className = 'waves-effect';            //计算涟漪坐标(折算成左上角坐标而非中心点),涟漪大小(取外标签最长边)          var wH = box.width() > box.height() ? box.width() : box.height();          var iX = e.pageX - box.offset().left;          var iY = e.pageY - box.offset().top;          var nX = iX - wH/2;          var nY = iY - wH/2;            //设置涟漪div样式,准备播放动画          wavesDiv.css({              width: wH,              height: wH,              left: nX,              top: nY          }).addClass("waves-effect-animation");//播放动画      });  });  </script>  <style>      .waves{          box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16),0 2px 10px 0 rgba(0,0,0,0.12);          border-radius: 3px;          display: inline-block;          outline:none;          border:0;          overflow: hidden;          position:relative;          opacity: 0.9;          text-align:center;      }      .waves:hover{          opacity: 1;          box-shadow: 0 3px 6px 0 rgba(0,0,0,0.20),0 3px 12px 0 rgba(0,0,0,0.16);      }        .waves-effect{          border-radius: 100%;          background-color:#D8D8D8;          left: 20px;          top: 20px;          transform: scale(0);          width: 10px;          height: 10px;          position:absolute;        }        .waves-effect-animation{          animation: animation-definition 1s ease-out;            /*兼容各大浏览器*/          -moz-animation: animation-definition 1s ease-out;            -webkit-animation: animation-definition 1s ease-out;            -o-animation: animation-definition 1s ease-out;        }      @keyframes animation-definition {            from{                transform: scale(0.1);                opacity: 1;          }              to{                transform: scale(2); /*因为涟漪的大小为标签的最长边,为了保证点击标签边缘时,涟漪也能覆盖整个标签,scale值最小应为2*/              opacity: 0;                      }       }      </style>    </head>  <body>      <b>不需要加p标签</b>      <br/>      <br/>        <button class="waves" style="width: 125px;height: 40px;background-color: #27C4B4;color: white">              Button1      </button>      <button class="waves" style="width: 125px;height: 40px;background-color: #EE6E73;color: white">              Button2      </button>      <br/><br/>      <b>需要加p标签<b>      <br/>      <br/>      <div class="waves" style="width: 125px;height: 40px;background-color: #311B92;color: white">          <p style="line-height:40px; display:inline;">Div</p>      </div>      <a href="#" class="waves" style="width: 125px;height: 40px;background-color: #FF9800;color: white">          <p style="line-height:40px; display:inline;">A</p>      </a>      <span class="waves" style="width: 125px;height: 40px;background-color: #607D8B;color: white">          <p style="line-height:40px; display:inline;">Span</p>      </span>  </body>  </html></code></pre>    <h3><strong>后续内容:</strong></h3>    <ul>     <li> <p>目前只有button使用该样式最方便(一开始也是只为button而写的),至于div、a、span等标签显示文字还需要嵌套一个p标签</p> </li>     <li> <p>为了方便重复使用,还需要将css、js提取出来</p> </li>    </ul>    <p> </p>    <p>来自:http://www.jianshu.com/p/44e256491928</p>    <p> </p>