1.css渲染右箭頭
<view class='arrow'></view>
.arrow {
width: 10px;
height: 10px;
border-top: 2px solid #999;
border-right: 2px solid #999;
position: absolute;
right: 20rpx;
transform: rotate(45deg);
margin-top: 10rpx;
}
2.view內容居中
.hxview {
display: flex; /*設置顯示樣式**/
align-items: center; /**子view垂直居中*/
vertical-align: center; /**垂直居中*/
flex-direction: row;
}