post-applet/custom-tab-bar/index.js

// custom-tab-bar/index.js
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    
  },

  /**
   * 组件的初始数据
   */
  data: {
    selected: 0,
    "color": "#969696",
    "selectedColor": "#0C6E4D",
    "backgroundColor": "#FFFFFF",
    "borderStyle": "black",
    "list": [{
        "pagePath": "/pages/index/sola/index.js",
        "text": "首页",
        "iconPath": "/icon/index.png",
        "selectedIconPath": "/icon/index-select.png"
      },
      {
        "pagePath": "/pages/stamp/stamp.js",
        "text": "邮品",
        "iconPath": "/icon/stamp.png",
        "selectedIconPath": "/icon/stamp-select.png"
      },
      {
        "pagePath": "/pages/me/me.js",
        "text": "我的",
        "iconPath": "/icon/me.png",
        "selectedIconPath": "/icon/me-select.png"
      }
    ]
  },

  /**
   * 组件的方法列表
   */
  methods: {
    switchTab(e) {
      const data = e.currentTarget.dataset
      const url = data.path
      wx.switchTab({url})
      this.setData({
        selected: data.index
      })
    }
}
})