swiper无法自动播放的解决办法

<script type="text/javascript">
    $(function(){
        var swiper = new Swiper('.swiper-container', {
            pagination: '.swiper-pagination',
            paginationClickable: true,
            speed: 2000,
            loop: true,
            observer:true,
            observeParents:true,
            autoplayDisableOnInteraction : false,
            autoplay:1500
        });
    })
</script>