JS实现移动端整屏滑动的实例代码

基本思路：

1）检测手指滑动方向：获取手指抬起时的位置，减去手指按下时的位置，得正即为向下滑动了

2）手指抬起后，向对应反向操作改变当前页的位置

具体代码如下：

html

<div id="wrap">  <div id="page01" class="pages">第一屏</div>  <div id="page02" class="pages">第二屏</div>  <div id="page03" class="pages">第三屏</div>  <div id="page04" class="pages">第四屏</div></div><div id="dots">  <span class="now"></span><span class=""></span><span class=""></span><span class=""></span></div>

css

*{      margin:0;      padding:0;    }    body{      overflow: hidden;    }    #wrap > div{      width: 10rem;      position: absolute;      left: 0;      top: 0;      background: #fff;      transition: all 0.3s ease;    }    #dots{      position: fixed;      right: 5px;      top: 40%;      z-index: 9;    }    #dots span{      display: block;      height: 0.2rem;      width: 0.2rem;      border: 1px solid #000;      border-radius: 50%;      margin-bottom: 3px;    }    #dots .now{      background: #555;    }

js分为两块

第一，设置html标签的font-size，以便设置rem的基数 （放在页面头部）

document.getElementsByTagName("html")[0].style.fontSize = window.innerWidth/10 + "px";

第二，具体的滑动操作代码

 window.onload = function(){      var oDiv = document.getElementById("wrap");      var aPages = oDiv.getElementsByClassName("pages");      var aDots = document.getElementById("dots").getElementsByTagName("span");      var winH = window.innerHeight;      var tTime = 1;      //设置每页的高度和zindex值      for(var i=0; i<aPages.length; i++){        aPages[i].style.height = winH + "px";        aPages[i].style.zIndex = 1;      }      aPages[0].style.zIndex = 3;      aPages[1].style.zIndex = 2;      oDiv.style.height = winH + "px";      //手指拖动事件（去除默认动作）      document.addEventListener("touchmove",function(e){        e.preventDefault();      });      var YStart = 0;      var iNow = 0;      //手指按下      oDiv.addEventListener("touchstart",function(e){        YStart = e.changedTouches[0].clientY;      });      //手指移动      oDiv.addEventListener("touchmove",function(e){        disY = e.changedTouches[0].clientY-YStart; //向下滑正，向上滑负      });      //手指离开      oDiv.addEventListener("touchend",function(e){        disY = e.changedTouches[0].clientY-YStart; //向下滑正，向上滑负        if(Math.abs(disY)>winH/20){ //只有当滑动距离大于了一定值得时候，才执行切换          if(disY<0){            iNow++;            if(iNow>=aDots.length){              iNow = 0;            }            aPages[0].style.transform = "translateY("+ -winH +"px)";            doSlide();          }else{            iNow--;            if(iNow<0){              iNow = aDots.length-1;            }            aPages[0].style.transform = "translateY("+ winH +"px)";            doSlide("up");          }        }      });      function doSlide(upflag){        for(var i=0;i<aDots.length;i++){          aDots[i].className = "";        }        aDots[iNow].className = "now";        if(upflag){            //向上滑            aPages[3].style.zIndex = 2;            aPages[1].style.zIndex = 1;            oDiv.insertBefore(aPages[3],aPages[1]);            setTimeout(function(){              aPages[1].style.transform = "translateY(0px)";              aPages[1].style.zIndex = 2;              aPages[0].style.zIndex = 3;            },300)        }else{          setTimeout(function(){            aPages[0].style.transform = "translateY(0px)";            aPages[0].style.zIndex = 1;            aPages[1].style.zIndex = 3;            aPages[2].style.zIndex = 2;            oDiv.appendChild(aPages[0]);          },300)        }      }    }