为小程序添加底部导航

修改app.json,加上tarBar元素。

{
  "pages":[
    "pages/buy/buy",
    "pages/sell/sell",
    "pages/report/report"
  ],
  "window":{
    "backgroundTextStyle":"light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "摆摊小账本",
    "navigationBarTextStyle":"black"
  },
  "tabBar": {
    "list": [
      {
        "pagePath": "pages/buy/buy",
        "text": "进货"
      },
      {
        "pagePath": "pages/sell/sell",
        "text": "销售"
      }
      ,
      {
        "pagePath": "pages/report/report",
        "text": "报告老板"
      }
    ]
  }
}

效果：