ap.offPullDownRefresh(CALLBACK)

<script src="https://gw.alipayobjects.com/as/g/h5-lib/alipayjsapi/3.1.1/alipayjsapi.inc.min.js"></script>

<h2 class="am-ft-center">下拉试试</h2>
<script>
  var handler = function(res){
    if(!res.refreshAvailable){
      ap.alert('刷新已禁止');
    }
    ap.offPullDownRefresh(handler);
  };
  ap.allowPullDownRefresh(false);
  ap.offPullDownRefresh(handler);
</script>