解决移动端Ios,当点击input键盘弹起再收起导致页面顶部部分遮挡, Ios端微信公众号，app,浏览器

1.  

   调用页面的input标签
   //html
   <input type="number"@blur="loseFocus" />

   //js
   判断是否是微信端
   isWeiXin() {
   const isWeiXin = window.navigator.userAgent.toLowerCase();
   return isWeiXin.match(/MicroMessenger/i) == "micromessenger";
   },
   loseFocus() {
   const u = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //判断时候是ios端
   if (this.isWeiXin() && !!u) {
   let currentPosition, timer;
   let speed = 0; // 页面滚动距离
   timer = setInterval(function () {
   currentPosition =
   document.documentElement.scrollTop || document.body.scrollTop;
   currentPosition -= speed;
   window.scrollTo(0, currentPosition); // 页面向上滚动
   currentPosition += speed; // speed变量
   window.scrollTo(0, currentPosition); // 页面向下滚动
   clearInterval(timer);
   }, 1);
   }
   },