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Code analysis to implement sliding banner effect on native javascript mobile terminal

黄舟Original: 2017-03-21 14:32:151637browse

This article mainly introduces the native javascript mobile terminal sliding banner effect in detail, which has certain reference value. Interested friends can refer to it

The example of this article is We have shared the specific code for the sliding banner effect on the mobile terminal for your reference. The specific content is as follows

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta content="telephone=yes" name="format-detection" />
  <meta name="apple-mobile-web-app-status-bar-style" content="white">
  <meta name="x5-fullscreen" content="true">
  <meta name="apple-touch-fullscreen" content="yes">
  <title>Document</title>
  <style>
    *{margin:0;padding:0;}
    .box{
      height:200px;
      width:100%;
      overflow: hidden;
    }
    .movebox{
      height:200px;
      width:9000px;
      padding:0;
      position:relative;
      left:0;
    }
    .movebox li{
      height:200px;
      float:left;
      list-style:none;
      font-size:30px;
      color:#fff;
    }

  </style>
  <script>
    window.onload = function(){

      var moveX,   //手指滑动距离
        endX,    //手指停止滑动时X轴坐标
        cout = 0,  //滑动计数器
        moveDir;  //滑动方向
      var movebox = document.querySelector(".movebox");  //滑动对象
      var Li = movebox.querySelectorAll("li");  //滑动对象item
      var width = parseInt(window.getComputedStyle(movebox.parentNode).width);  //滑动对象item的宽度

      movebox.style.width = (width*4) + "px"; //设置滑动盒子width
      for(var i = 0; i < Li.length; i++){
        Li[i].style.width = width + "px";  //设置滑动item的width，适应屏幕宽度
      }

      //触摸开始
      function boxTouchStart(e){
        var touch = e.touches[0];  //获取触摸对象
        startX = touch.pageX;  //获取触摸坐标
        endX = parseInt(movebox.style.webkitTransform.replace("translateX(", "")); //获取每次触摸时滑动对象X轴的偏移值
      }

      function boxTouchMove(e){
        var touch = e.touches[0];
        moveX = touch.pageX - startX;  //手指水平方向移动的距离

        if(cout == 0 && moveX > 0){   //刚开始第一次向左滑动时
          return false;
        }

        if(cout == 3 && moveX < 0){   //滑动到最后继续向右滑动时
          return false;
        }

        movebox.style.webkitTransform = "translateX(" + (endX + moveX) + "px)"; //手指滑动时滑动对象随之滑动
      }

      function boxTouchEnd(e){
        moveDir = moveX < 0 ? true : false;   //滑动方向大于0表示向左滑动，小于0表示向右滑动
        //手指向左滑动
        if(moveDir){

          if(cout<3){
            movebox.style.webkitTransform = "translateX(" + (endX-width) + "px)";
            cout++;
          }
        //手指向右滑动
        }else{
          //滑动到初始状态时返回false
          if(cout == 0){
            return false;
          }else{
            movebox.style.webkitTransform = "translateX(" + (endX+width) + "px)";
            cout--;
          }
        }
      }

      //滑动对象事件绑定
      movebox.addEventListener("touchstart", boxTouchStart, false);
      movebox.addEventListener("touchmove", boxTouchMove, false);
      movebox.addEventListener("touchend", boxTouchEnd, false);
    }
  </script>
</head>

<body style="position:absolute;width:100%;overflow:hidden;">
  <p class="box">
    <ul class="movebox" style="transition-duration:0.2s;transform: translateX(-0px);">
      <li style="background:red;">1</li>
      <li style="background:yellow">2</li>
      <li style="background:blue">3</li>
      <li style="background:green">4</li>
    </ul>
  </p>
</body>

</html>

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