微信小程序tabbar不显示

"pages":[
    "pages/logs/logs",
    "pages/index/index"
  ],

微信小程序在测试tabbar的时候怎么都不显示。

我就不贴api了。直接上代码

{
  "pages":[
    "pages/logs/logs",
    "pages/index/index"
  ],
  "window":{
    "backgroundTextStyle":"light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "小程序",
    "navigationBarTextStyle":"black"
  },
  "tabBar":{
    "selectedColor":"#dddddd",
    "color": "#3cc51f",
    "backgroundColor":"#ffffff",
    "list":[{
      "text" : "登录",
      "pagePath" : "pages/logs/logs",
      "iconPath" : "image/12.png",
      "selectedIconPath" : "image/12.png"
    },{
      "text":"注销",
      "pagePath" : "pages/index/index",
      "iconPath" : "image/12.png",
      "selectedIconPath" : "image/12.png"
    },{
      "text" : "日志",
      "pagePath" : "pages/logs/logs",
      "iconPath" : "image/12.png",
      "selectedIconPath" : "image/12.png"
    }]
  }
}

这个json看了一天，直觉告诉我没什么问题。实际上也没什么问题。

但是坑爹的一幕来了，tabbar怎么都不显示。最后发现是

"pages":[
    pages/logs/logs",
    "pages/index/index"
  ],

看标红的问题。第一行绝对是不能配置为"pages/index/index"。所以我换成了pages/logs/logs要不然是不会显示tabbar的