reader/pages/activity/index.js

Page({
  data: {
    activityList: true
  },
  onShow() {
    if (typeof this.getTabBar === 'function') {
      this.getTabBar().setData({
        selected: 1
      })
      this.setData({
        activityList: true
      })
    }
  },
  onHide() {
    this.setData({
      activityList: false
    })
  },
  resetData() {
    this.selectComponent('#activityList').getActivities()
  }
})