我在这里只是简单的介绍一下用法，感兴趣的同学可以查看演示，然后用手机扫一扫！测试一下！

我们引入如下js

        <script src="https://hammerjs.github.io/dist/hammer.js"></script>

   <style>
            #myElement {
                background: silver;
                height: 300px;
                text-align: center;
                font: 30px/300px Helvetica, Arial, sans-serif;
            }
        </style>
        <div id="myElement"></div>

  var myElement = document.getElementById('myElement');

            var mc = new Hammer.Manager(myElement);

// create a pinch and rotate recognizer
// these require 2 pointers
            var pinch = new Hammer.Pinch();
            var rotate = new Hammer.Rotate();

// we want to detect both the same time
            pinch.recognizeWith(rotate);

// add to the Manager
            mc.add([pinch, rotate]);


            mc.on("pinch rotate", function (ev) {
                myElement.textContent += ev.type + " ";
            });

这样，当我们旋转pinch或者rotate的时候，都可以触发文本！