Html

1、上下左右居中：

display: flex;

align-items: center;  //上下居中

justify-content: center; //左右居中

2、图片自适应居中属性

object-fit:cover;

Mui

下拉刷新data-pullToRefresh：

var pullrefresh = mui.data[mui(".mui-scroll")[0].getAttribute("data-pullToRefresh")];

if(pullrefresh.loading == true){

        //关闭下拉刷新

        pullrefresh.endPullDownToRefresh();

}else{

        //开启下拉刷新

        pullrefresh.pullDownLoading();

}

下拉刷新mui-scroll-wrapper：

mui('#scroll3').pullRefresh().pulldownLoading(); 

mui('#scroll1').pullRefresh().endPulldownToRefresh();

Vue

1、vue绑定backgroundImage

v-bind:style="{backgroundImage:'url(' + item.pic + ')'}"