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JS实现移动端整屏滑动的实例代码

程序员文章站 2022-03-08 08:25:26
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: h...

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)
        }
      }
    }

好了,在给大家分享一段简单的代码,js实现移动端整页滑屏示,具体代码如下所示:

<!doctype html>
<html>
  <head>
    <meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=0" />
    <meta name="format-detection" content="telephone=no" />
    <meta content="yes" name="mobile-web-app-capable">
    <meta content="yes" name="apple-mobile-web-app-capable" />
    <meta http-equiv="cache-control" content="no-siteapp" />
    <title>移动端整页滑屏示例</title>
    <style type="text/css">
      * {
        padding: 0;
        margin: 0;
        font-family: verdana;
      }
      body,
      html {
        height: 100%;
        background-color: #000000;
      }
      .wrap {
        width: 100%;
        height: 100%;
        overflow: hidden;
      }
      .wrap2 {
        width: 100%;
        height: 1000%;
        transition: 0.3s linear
      }
      .page {
        width: 100%;
        height: 10%
      }
      .page {
        background-color: #fdfdfd;
        font-size: 100px;
        line-height: 400px;
        text-align: center;
        font-weight: bold;
      }
    </style>
  </head>
  <body>
    <div class="wrap" id="wrap">
      <div class="wrap2" id="wrap2">
        <div class="page">1</div>
        <div class="page" style="background-color:#dddddd;">2</div>
        <div class="page">3</div>
        <div class="page" style="background-color:#dddddd;">4</div>
        <div class="page">5</div>
        <div class="page" style="background-color:#dddddd;">6</div>
      </div>
    </div>
    <script type="text/javascript">
      //重要!禁止移动端滑动的默认事件
      document.body.addeventlistener('touchmove', function(event) {
        event = event ? event : window.event;
        if(event.preventdefault) {
          event.preventdefault()
        } else {
          event.returnvalue = false
        }
      }, false)
      var pages = function(obj) {
        var box = document.getelementbyid(obj.wrap);
        var box2 = document.getelementbyid(obj.wrap2);
        var len = obj.len;
        var n = obj.n;
        var starty, movey, clih;
        //获取屏幕高度
        var geth = function() {
          clih = document.body.clientheight
        };
        geth();
        window.addeventlistener('resize', geth, false);
        //touchstart
        var touchstart = function(event) {
          if(!event.touches.length) {
            return;
          }
          starty = event.touches[0].pagey;
          movey = 0;
        };
        //touchmove
        var touchmove = function(event) {
          if(!event.touches.length) {
            return;
          }
          movey = event.touches[0].pagey - starty;
          box2.style.transform = 'translatey(' + (-n * clih + movey) + 'px)'; //根据手指的位置移动页面
        };
        //touchend
        var touchend = function(event) {
          //位移小于+-50的不翻页
          if(movey < -50) n++;
          if(movey > 50) n--;
          //最后&最前页控制
          if(n < 0) n = 0;
          if(n > len - 1) n = len - 1;
          //重定位
          box2.style.transform = 'translatey(' + (-n * 10) + '%)'; //根据百分比位置移动页面
          console.log(n)
        };
        //touch事件绑定
        box.addeventlistener("touchstart", function(event) {
          touchstart(event)
        }, false);
        box.addeventlistener("touchmove", function(event) {
          touchmove(event)
        }, false);
        box.addeventlistener("touchend", function(event) {
          touchend(event)
        }, false);
      };
      pages({
        wrap: 'wrap', //.wrap的id
        wrap2: 'wrap2', //.wrap2的id
        len: 6, //一共有几页
        n: 0 //页面一打开默认在第几页?第一页就是0,第二页就是1
      });
    </script>
  </body>
</html>

总结

以上所述是小编给大家介绍的js实现移动端整屏滑动的实例代码,希望对大家有所帮助