在App.json文件内配置tabBar即可

 "tabBar": {
    "backgroundColor": "#e22",
    "color": "#999",
    "selectedColor": "#fee",
    "list": [{
      "pagePath": "pages/blma/blma",
      "text": "白龙马",
      "iconPath": "image/qq5217.jpg",
      "selectedIconPath": "image/qq5217.jpg"
    },
    {
      "pagePath": "pages/5217/5217",
      "text": "5217",
      "iconPath": "image/qq5217.jpg",
      "selectedIconPath": "image/qq5217.jpg"
    },
    {
      "pagePath": "pages/my/my",
      "text": "我的",
      "iconPath": "image/qq5217.jpg",
      "selectedIconPath": "image/qq5217.jpg"
    }
    ]
  },

** tabBar配置2-5个项目有效，也就是最少2项，最多5项。 **

"backgroundColor": "#e22", //北京颜色
"color": "#999", //文本颜色
"selectedColor": "#fee", //选中后的文本颜色
"list": [ //tabBar的list数组
{ //第一项
"pagePath": "pages/blma/blma", //页面路径
"text": "白龙马", //文本
"iconPath": "image/qq5217.jpg", //默认图标
"selectedIconPath": "image/qq5217.jpg" //选中图标
},