直接复制粘贴 放在页面中即可

<script>

window.onload = function(){

window.addEventListener('touchstart', touchstart, false);

window.addEventListener('touchmove', touchMove, false);

}

var _start = 0; 

var _end = 0;

function touchstart(event) {

var touch = event.targetTouches[0];

_start = touch.pageY; 

}

function touchMove(event){ 

var touch = event.targetTouches[0]; 

_end = ( touch.pageY - _start); 

//下滑才执行操作 

if(_end > 200){     //200即手机下滑屏幕的距离，超过200则执行刷新动作

location.reload();

} 

} 

</script>