How to Create a Circular Rotating Object Animation Using CSS and jQuery?

CSS for circular rotation of objects

Using CSS to rotate multiple objects around a circle is challenging. Here's how to best solve this problem:

Using jQuery

jQuery provides a simple solution to rotate any number of outer elements. The following is the code implemented using jQuery:

var radius = 100; // 调整以移动对象进出
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;
});

Using CSS animation

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>

The above is the detailed content of How to Create a Circular Rotating Object Animation Using CSS and jQuery?. For more information, please follow other related articles on the PHP Chinese website!