let top = document.documentElement.scrollTop || document.body.scrollTop || window.pageYOffset;
 if(top > this.$refs.filmSwiper.$el.offsetHeight)
            {
    
    
                this.isFixed = true;
                // console.log('fixed')
            }
            else{
    
    
                this.isFixed = false;
                // console.log('unfixed')
            }
 }