1.在app.json里新增

“useExtendedLib”: {

“weui”: true

}

2.在使用的页面json文件应用组件，比如在index.json里

"usingComponents": {

    "mp-navigation-bar": "weui-miniprogram/navigation-bar/navigation-bar",

    "mp-icon": "weui-miniprogram/icon/icon"

  }

3.可以参考此代码片段

https://developers.weixin.qq.com/s/mjAXwumk7gjD