ZhangYang's Blog

手机移动端页面

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300ms延迟

时间流

  • 那时的网页都是给 PC 用的，宽度是 1000px 左右
  • 移动端页面会自动缩放,如320px缩放成980px来看960px的页面
  • 双击是表示放大,单击是点击
  • 单击会出现300ms延迟,如果300ms内再点击就是放大,否则是点击
  • BAT程序员解决单击出现300ms延迟用touchstart事件
  • 导致一系列问题,所以造了fackclick.js库

解决方法

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// 如今都是给移动端宽度写页面,不需要缩放,所以不需要也没有300ms延迟
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">

触屏事件

触屏事件的应用

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <title>触屏事件</title>
  <style>
    .box{
      width: 50vw;
      height: 50vh;
      background-color: green;
    }
  </style>
</head>
<body>
  <div class="box"></div>
  <script>
    var box = document.querySelector('.box')
    box.addEventListener('touchstart',function(){
      console.log('开始摸了')
    })
    box.addEventListener('touchcancel',function(){
      console.log('取消触摸')
    })
    box.addEventListener('touchend',function(){
      console.log('摸完了')
    })
    box.addEventListener('touchenter',function () {
      console.log('摸进去了')
    })
    box.addEventListener('touchleave',function(){
      console.log('摸出来了')
    })
    box.addEventListener('touchmove',function () {
      console.log('边摸边动')
    })
  </script>
</body>
</html>

触屏事件的写字小例子

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <title>触屏事件</title>
  <style>
  /*手机端初始化*/
  *,*::after,*::before{
    box-sizing: border-box;
  }
  img{
    max-width: 100%;
    max-height: 100%;
  }
  body{
    margin: 0;
  }
  .box{
    width: 100vw;
    height: 100vh;
    background-color: green;
  }
  </style>
</head>
<body>
  <div class="box"></div>
  <script>
    var box = document.querySelector('.box')
    function addPoint(x,y) {
      let div = document.createElement('div')
      div.style.position = 'absolute'
      div.style.top = y + 'px'
      div.style.left = x + 'px'
      div.style.height = '5px'
      div.style.width = '5px'
      div.style.background = 'black'
      document.body.appendChild(div)
    }
    box.addEventListener('touchstart',function(e){
      console.log('开始摸了')
      let {pageX,pageY} = e.touches[0]
      addPoint(pageX,pageY)
    })
  </script>
</body>
</html>