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web mobile touch sliding event_html/css_WEB-ITnose

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Jun 24, 2016 am 11:43 AM

Example of web mobile touch event~~~

Note: 1. If it is not an inline element, you need to assign a value before getting the attribute value of style ~ otherwise it will be Null.

2. Personally tested the built-in browser of andriod mobile phone MX4 and it runs perfectly~~ but the WeChat browser does not support it~ The reason has not been found.

 1 <!DOCTYPE html> 2 <html> 3 <head> 4     <meta http-equiv="Content-Type" Content="text/html; charset=utf-8;"> 5     <title>web移动端触摸滑动事件</title> 6     <meta name="description" content="web移动端触摸滑动事件"/> 7     <meta name="viewport" content="user-scalable=no"> 8 </head> 9 <body>10 <div style="position:relative;left:10px;top:10px;height: 100px;width: 200px;background: blue;" id="slider"></div>11 <script>12     var slider = {13         //判断设备是否支持touch事件14         touch: ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch,15         slider: document.getElementById('slider'),16         //事件17         events: {18             slider: this.slider,     //this为slider对象19             handleEvent: function (event) {20                 var self = this;     //this指events对象21                 if (event.type == 'touchstart') {22                     self.start(event);23                 } else if (event.type == 'touchmove') {24                     self.move(event);25                 } else if (event.type == 'touchend') {26                     self.end(event);27                 }28             },29             //touchstart30             start: function (event) {31                 event.preventDefault();                 //阻止浏览器的默认事件32                 var touch = event.targetTouches[0];     //touches数组对象获得屏幕上所有的touch，取第一个touch33                 startPos = {x: touch.clientX, y: touch.clientY};    //取第一个touch的坐标值34                 sliderX = parseInt(this.slider.style.left);            //获取触摸时滑动块的初始位置35                 sliderY = parseInt(this.slider.style.top);36                 this.slider.addEventListener('touchmove', this, false);37                 this.slider.addEventListener('touchend', this, false);38             },39             //touchmove40             move: function (event) {41                 //当屏幕有多个touch或者页面被缩放过，就不执行move操作42                 if (event.targetTouches.length > 1 || event.scale && event.scale !== 1) return;43                 var touch = event.targetTouches[0];44                 endPos = {x: touch.clientX - startPos.x, y: touch.clientY - startPos.y};                 //获取所移动的距离45                 event.preventDefault();      //阻止触摸事件的默认行为，即阻止滚屏46                 this.slider.style.left = (sliderX + endPos.x ) + 'px';47                 this.slider.style.top = (sliderY + endPos.y) + 'px';48 49             },50             //滑动释放51             end: function (event) {52                 //解绑事件53                 this.slider.removeEventListener('touchmove', this, false);54                 this.slider.removeEventListener('touchend', this, false);55             }56         },57 58         //初始化59         init: function () {60             var self = this;     //this指slider对象61             if (!!self.touch) self.slider.addEventListener('touchstart', self.events, false);    //addEventListener第二个参数可以传一个对象，会调用该对象的handleEvent属性62         }63     };64     slider.init();65 </script>66 </body>67 </html>

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