一、效果如下：
二、准备好tabbar所需要的4组UI图标
三、修改项目更根目录中的pages.json配置文件，新增tabbar的配置节点如下：
源码：
"tabBar": {
"selectedColor": "#fb6e03",
"list": [
{
"pagePath": "pages/home/home",
"text": "首页",
"iconPath": "static/tab_icons/home.png",
"selectedIconPath": "static/tab_icons/home-active.png"
},
{
"pagePath": "pages/cate/cate",
"text": "分类",
"iconPath": "static/tab_icons/cate.png",
"selectedIconPath": "static/tab_icons/cate-active.png"
},
{
"pagePath": "pages/cart/cart",
"text": "购物车",
"iconPath": "static/tab_icons/cart.png",
"selectedIconPath": "static/tab_icons/cart-active.png"
},
{
"pagePath": "pages/my/my",
"text": "我的",
"iconPath": "static/tab_icons/my.png",
"selectedIconPath": "static/tab_icons/my-active.png"
}
]
}