js 页面
Page({ data: { realScrollTop: 0,//页面滚动距离 driveHeight //屏幕高度可初始化设置},scroll(e){ if(e.detail.scrollTop > this.data.realScrollTop){ this.setData({ realScrollTop: e.detail.scrollTop }); } }});
wxmal页面
<scroll-view scroll-y="true" scroll-top="{{resetScrollTop}}" bindscroll="scroll" ><image wx:if="{{realScrollTop+driveHeight*2 > (index*70)}}" src="{{item[‘img‘]}}"></image> <image wx:else src="{{item[‘bgm‘]}}"></image></scroll-view>
