使用原生js封装webapp滑动效果(惯性滑动、滑动回弹)

  PC 移动端兼容  IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+ 惯性助动,滑动回弹

  门面模式

  

复制代码 代码如下:

  window.onload = function() {

  /*测试数据*/

  var insert = '';

  for (var i = 0; i < 80; i++) {

  insert += '<div style = "width:100%; text-align:center;">滑动测试 ' + i + '</div>';

  }

  document.getElementById("moveArea").innerHTML = insert;

  /*测试数据   */

  var at = new appTouch({

  tContain : 'appArea', //必选:滑动区域id

  tMove : 'moveArea', //必选:移动区域id

  tScroller : 'scroller', //必选:自定义滚动条

  tScrollerArea : 'scrollerArea'//必选:滚动条区域

  }, onmoveend);

  //到顶/底回调

  function onmoveend(m) {

  //console.log(m);

  }

  }

  /*=====================

  * 名称: appTouch

  * 功能: web app滑动模拟组件

  * 参数: 相关配置

  ======================*/

  var appTouch = function(config, callback) {

  this.touchContain = config.tContain;

  this.touchMove = config.tMove;

  this.touchScroller = config.tScroller;

  this.touchScrollerArea = config.tScrollerArea;

  this.callbackfn = callback;

  this.move();

  }

  appTouch.prototype = {

  move : function(e) {

  var monitor = document.getElementById(this.touchContain), //监听容器

  target = document.getElementById(this.touchMove), //移动目标

  scroller = document.getElementById(this.touchScroller), //自定义滚动条

  scrollerArea = document.getElementById(this.touchScrollerArea), //滚动条区域

  sheight = monitor.offsetHeight / target.offsetHeight * monitor.offsetHeight, //自定义滚动条的长度

  st = (target.offsetHeight - monitor.offsetHeight) / (monitor.offsetHeight - sheight), //移动块对应滚轮单位长度

  tslow = 4, //到顶/底减基数

  tMove = 0, //滑块到顶top值

  tMoveL = tMove + 140, //到顶允许下拉范围

  bMove = monitor.offsetHeight - target.offsetHeight, //滑块到底top值

  bMoveL = bMove - 140, //到底允许上滑范围

  callbackfn = this.callbackfn, //回调函数

  flg = false, //标记是否滑动

  startY, //标记起始位置

  startTop, //标记滑动起始时的高度值

  move = 0;

  //移动距离

  //鼠标事件注册

  addEvent(monitor, 'mousedown', moveStart);

  addEvent(monitor, 'mousemove', moveIn);

  addEvent(monitor, 'mouseup', moveEnd);

  addEvent(window, 'mousemove', moveIn);

  addEvent(window, 'mouseup', moveEnd);

  //移动设备触摸事件注册

  addEvent(monitor, 'touchstart', moveStart);

  addEvent(monitor, 'touchmove', moveIn);

  addEvent(monitor, 'touchend', moveEnd);

  /**

  *外观/门面模式包装

  */

  /*事件监听 */

  function addEvent(el, type, fn) {

  if (el.addEventListener) {

  el.addEventListener(type, fn, false);

  } else if (el.attachEvent) {

  el.attachEvent('on' + type, fn);

  } else {

  el['on' + type] = fn;

  }

  }

  //取消浏览器默认行为

  function stop(e) {

  //Opera/Chrome/FF

  if (e.preventDefault)

  e.preventDefault();

  //IE

  e.returnValue = false;

  }

  //包装结束

  /**

  *操作函数

  */

  //惯性缓动参数

  var lastMoveTime = 0;

  var lastMoveStart = 0;

  var stopInertiaMove = false;

  /*移动触发*/

  function moveStart(e) {

  stop(e);

  flg = true;

  if (e.touches)

  e = e.touches[0];

  startY = e.clientY;

  startTop = target.style.top || 0;

  //惯性缓动

  lastMoveStart = startY;

  lastMoveTime = new Date().getTime();

  stopInertiaMove = true;

  scrollerArea.style.visibility = 'visible';

  }

  /*移动过程中*/

  function moveIn(e) {

  if (flg) {

  stop(e);

  if (e.touches)

  e = e.touches[0];

  move = e.clientY - startY + parseInt(startTop);

  if (move > tMove) {

  (move - tMove) / tslow + tMove > tMoveL ? move = tMoveL : move = (move - tMove) / tslow + tMove

  } else if (move < bMove)

  (move - bMove) / tslow + bMove < bMoveL ? move = bMoveL : move = (move - bMove) / tslow + bMove;

  target.style.top = move + 'px';

  scroller.style.top = -move / st + 'px';

  //惯性缓动

  var nowTime = new Date().getTime();

  stopInertiaMove = true;

  if (nowTime - lastMoveTime > 300) {

  lastMoveTime = nowTime;

  lastMoveStart = e.clientY;

  }

  }

  }

  /*移动结束*/

  function moveEnd(e) {

  stop(e);

  if (e.touches)

  e = e.touches[0];

  //惯性缓动

  var contentTop = target.style.top.replace('px', '');

  var contentY = (parseInt(contentTop) + e.clientY - lastMoveStart);

  var nowTime = new Date().getTime();

  var v = (e.clientY - lastMoveStart) / (nowTime - lastMoveTime);

  //最后一段时间手指划动速度

  stopInertiaMove = false;

  (function(v, startTime, contentY) {

  var dir = v > 0 ? -1 : 1;

  //加速度方向

  var deceleration = dir * 0.005;

  function inertiaMove() {

  if (stopInertiaMove)

  return;

  var nowTime = new Date().getTime();

  var t = nowTime - startTime;

  var nowV = v + t * deceleration;

  var moveY = (v + nowV) / 2 * t;

  // 速度方向变化表示速度达到0了

  if (dir * nowV > 0) {

  if (move > tMove) {

  callbackfn('到顶了');

  target.style.top = tMove + 'px';

  scroller.style.top = tMove + 'px';

  } else if (move < bMove) {

  callbackfn('到底了');

  target.style.top = bMove + 'px';

  scroller.style.top = -bMove / st + 'px';

  }

  setTimeout(function() {

  if (!stopInertiaMove)

  scrollerArea.style.visibility = 'hidden';

  }, 4000);

  return;

  }

  move = contentY + moveY;

  if (move > tMove) {

  t /= 20;

  move = (move - tMove) / 10 + tMove;

  } else if (move < bMove) {

  t /= 20;

  move = (move - bMove) / 10 + bMove;

  }

  target.style.top = move + "px";

  scroller.style.top = -move / st + 'px';

  setTimeout(inertiaMove, 10);

  }

  inertiaMove();

  })(v, nowTime, contentY);

  move = 0;

  flg = false;

  }

  //操作结束

  /**

  *相关初始化

  */

  //滚动条长度初始化

  scroller.style.height = sheight + 'px';

  //初始化结束

  },

  otherInteract : function() {

  //其他功能扩充

  }

  }

  IE hack css

  

复制代码 代码如下:

  body,html {background-color:#333; margin: 0; height: 100%; line-height: 2.0; font-family: 'Microsoft YaHei'; overflow-y:hidden;}

  #contain{margin: 0 auto; position:relative; width: 100%; max-width: 480px; _width: 480px; height: 100%; cursor: pointer !important;}

  #appArea{position: absolute; width: 100%; height: 100%; overflow: hidden;  background-color: #fff;}

  #topInfo{position: absolute;top: 60px;width: 100%; height:60px; text-align: center; font-size: 18px; }

  #bottomInfo{position: absolute;bottom: 0;width: 100%;}

  #scrollerArea{position: absolute; right: 0; width: 1.5%; height: 100%;visibility: hidden;}

  #scroller{position: absolute; top:0; width: 100%;  background-color: #aaa;}

  #moveArea{position: absolute; top:0px; width: 100%; background-color: #ddd;}

  HTML代码

  

复制代码 代码如下:

  <!DOCTYPE html>

  <html>

  <head>

  <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />

  <meta name="viewport" content="width=device-width, initial-scale=1.0,user-scalable=no">

  <link type="text/css" href="css/main.css" rel="stylesheet">

  <title>滑动回弹</title>

  <!--[if lt IE 9]>      <![endif]-->

  <noscript></noscript>

  </head>

  <body>

  <div id="contain">

  <div id="appArea">

  <div id="topInfo">

  logo or animate

  </div>

  <div id="bottomInfo">

  some imformation  2014-4-28

  </div>

  <div id="moveArea"></div>

  <div id="scrollerArea">

  <div id="scroller"></div>

  </div>

  </div>

  </div>

  <script src="js/main.js"></script>

  </body>

  </html>