注册一个小程序appId，新建自己的项目，了解小程序的框架结构。
制作底部导航栏时，添加导航按钮关联页面，注意配置在app.json配置page时，要把第一个导航按钮页面放在第一个位，不然其他页面会覆盖。
在app.json中添加list数组，每个数组是一个导航按钮。
app.json
"tabBar": {"selectedColor": "#1296db","list": [{"pagePath": "pages/test1/index","text": "首页","iconPath": "images/fuli_no.png","selectedIconPath": "images/fuli_yes.png"},{"pagePath": "pages/test2/index","text": "设置","iconPath": "images/index_no.png","selectedIconPath": "images/index_yes.png"},{"pagePath": "pages/test3/index","text": "帮助","iconPath": "images/person_no.png","selectedIconPath": "images/person_yes.png"}]}"pages":["pages/test1/index","pages/index/index","pages/logs/logs","pages/test2/index","pages/test3/index"]
文件目录如下：
