ios10键盘问题

updated(){
        var _this= this;
　　　　　//键盘弹起遮挡输入框　
        document.body.addEventListener('focusin', (e) =>{
            var timer1 = setInterval(function() {
                document.body.scrollTop = document.body.scrollHeight;
                _this.scrollToBottom()
                clearInterval(timer1);
            }, 100)
        })
        // 软键盘消失后，解决页面无法回弹
        document.body.addEventListener('focusout', (e) =>{
            var ua = navigator.userAgent.toLowerCase();
            if(/iphone|ipad|ipod/.test(ua)) {
                var currentPosition, timer2;
                var speed = 1;
                timer2 = setInterval(function() {
                    currentPosition=document.documentElement.scrollTop || document.body.scrollTop;
                    currentPosition-=speed;
                    window.scrollTo(0,currentPosition);
                    currentPosition+=speed;
                    window.scrollTo(0,currentPosition);
                    clearInterval(timer2);
                }, 1);
            }
        })
 },