flex布局左边自适应,右边宽度固定

wxml:

 左边自适应
 右边固定


wxss
.content{
display:flex;
align-items:center ;
just-content:space-between;
}
.left-content{
min-width:0;
flex:1;
}
.right-content{
 width:200rpx;
}