微信小程序--app.json全局配置文件

enablePullDownRefresh 是否开启当前页面下拉刷新。只有开启这个属性，backgroundTextStyle和backgroundColor这两个属性才能看到，这两个属性都是设置的，当页面下拉刷新时出现的区域的样式，可以自己尝试一下，写上以上样式后更改属性值，即可看到

"window":{
    "backgroundTextStyle":"light",
    "navigationBarBackgroundColor": "#666",
    "navigationBarTitleText": "微信接口功能演示",
    "navigationBarTextStyle":"black",
    "backgroundColor":"yellow",
    "enablePullDownRefresh":true
  },

tabBar 就是底部的图标：
tabBar一定和pages,window是同级别的
第一个参数pagePath 是点击图标之后链接的地址，和pages里面存放的页面地址是对应的
第二个参数text 是图标下面的文字
第三个参数是iconPath 未被选中图标的图片地址
第四个参数是selectedIconPath 选中图标的图片地址

如果想要修改tabBar的文字以及背景颜色，要和list同级别
要注意：当 position 为 top 时，不显示 icon。如下图所示

app.json文件

{
  "pages":[
    "pages/index/index",
    "pages/demo01/demo01",
    "pages/logs/logs",
    "pages/aixin/aixin",
    "pages/bangzhu/bangzhu",
    "pages/banji/bianji",
    "pages/chuangzuo/chaungzuo"
  ],
  "window":{
    "backgroundTextStyle":"light",
    "navigationBarBackgroundColor": "#666",
    "navigationBarTitleText": "微信接口功能演示",
    "navigationBarTextStyle":"black",
    "backgroundColor":"yellow",
    "enablePullDownRefresh":true
  },
  "tabBar": {
    "list": [
      {
      "pagePath": "pages/index/index",
      "text": "首页",
      "iconPath": "icon/aixin.png",
      "selectedIconPath": "icon/_aixin.png"
    },
    {
      "pagePath": "pages/banji/bianji",
      "text": "编辑",
      "iconPath": "icon/bianji.png",
      "selectedIconPath": "icon/_bianji.png"
    },
    {
      "pagePath": "pages/bangzhu/bangzhu",
      "text": "帮助",
      "iconPath": "icon/bangzhu.png",
      "selectedIconPath": "icon/_bangzhu.png"
    }
  ],
  "backgroundColor": "#ff9400",
  "color": "#ffffff",
  "position":"top"

  },
  "style": "v2",
  "sitemapLocation": "sitemap.json"
}