微信小程序增加tabbar

app.json里写这个
"tabBar": {
"color": "#7f8389",
"selectedColor": "#00a8f3",
"borderStyle": "black",
"backgroundColor": "#f7f7fa",
"list": [{
"pagePath": "pages/index/main",
"text": "新建投票",
"iconPath": "./static/images/gonggao2@2x.png",
"selectedIconPath": "./static/images/gonggao2@2x.png"
}, {
"pagePath": "pages/index/main",
"text": "投票广场",
"iconPath": "./static/images/gonggao2@2x.png",
"selectedIconPath": "./static/images/gonggao2@2x.png"
}, {
"pagePath": "pages/index/main",
"text": "我的投票",
"iconPath": "./static/images/gonggao2@2x.png",
"selectedIconPath": "./static/images/gonggao2@2x.png"
}]
}