使用CSS围绕圆周旋转对象？ [英] Rotate objects around circle using CSS?

问题描述

我试图让三个物体围绕一个圆圈旋转。到目前为止，我已经能够得到一个对象绕着圆周旋转。我不能得到多于一个，而不会弄乱的代码。任何人都可以建议最好的方法来完成这个？这里是代码和小提琴的一部分。非常感谢！

I'm attempting to have three objects rotating around a circle. So far I've been able to get one object to spin around the circle. I am unable to get more than one without messing up the code. Could anyone advise on the best way to accomplish this? Here is part of the code and a Fiddle. Thanks!

以下是 演示< a>

.outCircle {
  width: 200px;
  height: 200px;
  background-color: lightblue;
  left: 270px;
  position: absolute;
  top: 50px;
  -moz-border-radius: 100px;
  -webkit-border-radius: 100px;
  border-radius: 100px;
}
.rotate {
  width: 100%;
  height: 100%;
  -webkit-animation: circle 10s infinite linear;
}
.counterrotate {
  width: 50px;
  height: 50px;
  -webkit-animation: ccircle 10s infinite linear;
}
.inner {
  width: 100px;
  height: 100px;
  background: red;
  -moz-border-radius: 50px;
  -webkit-border-radius: 50px;
  border-radius: 100px;
  position: absolute;
  left: 0px;
  top: 0px;
  background-color: red;
  display: block;
}
@-webkit-keyframes circle {
  from {
    -webkit-transform: rotateZ(0deg)
  }
  to {
    -webkit-transform: rotateZ(360deg)
  }
}
@-webkit-keyframes ccircle {
  from {
    -webkit-transform: rotateZ(360deg)
  }
  to {
    -webkit-transform: rotateZ(0deg)
  }
}

<div class="outCircle">
  <div class="rotate">
    <div class="counterrotate">
      <div class="inner">hello
      </div>
    </div>
  </div>
</div>

推荐答案

Jquery解决方案适用于任何数量的外部项目。

Jquery solution which works for any number of outer items.

Jquery无耻地从 ThiefMaster♦ 及其回答 Q& A

Jquery shamelessly stolen from ThiefMaster♦ and their answer at this Q & A

var radius = 100; // adjust to move out items in and out 
var fields = $('.item'),
  container = $('#container'),
  width = container.width(),
  height = container.height();
var angle = 0,
  step = (2 * Math.PI) / fields.length;
fields.each(function() {
  var x = Math.round(width / 2 + radius * Math.cos(angle) - $(this).width() / 2);
  var y = Math.round(height / 2 + radius * Math.sin(angle) - $(this).height() / 2);
  if (window.console) {
    console.log($(this).text(), x, y);
  }
  $(this).css({
    left: x + 'px',
    top: y + 'px'
  });
  angle += step;
});

body {
  padding: 2em;
}
#container {
  width: 200px;
  height: 200px;
  margin: 10px auto;
  border: 1px solid #000;
  position: relative;
  border-radius: 50%;
  animation: spin 10s linear infinite;
}
.item {
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  border-radius: 50%;
  position: absolute;
  background: #f00;
  animation: spin 10s linear infinite reverse;
}
@keyframes spin {
  100% {
    transform: rotate(1turn);
  }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
  <div class="item">6</div>
</div>

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