schoolwisdoms-student-mp/pages/Components/selectDate/selectDate.js

// pages/Components/selectDate/selectDate.js
Component({
  lifetimes: {
    attached: function () {
      var date = new Date()
      const year = date.getFullYear()
      const month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
      const day = date.getDate() + 1 < 10 ? '0' + date.getDate() : date.getDate()
      this.setData({
        endDate: year + '-' + month + '-' + day,
        lastDate: year + '-' + month + '-' + day
      })
    }
  },
  /**
   * 组件的属性列表
   */
  properties: {
    beginDate: {
      type: String
    },
    endDate: {
      type: String
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    beginDate: '2020-01-01',
    endDate: '2021-02-02',
    initDate: '2020-01-01',
    lastDate: '',
    yFlag: false,
    animationBox: {},
    animationBg: {},
  },

  /**
   * 组件的方法列表
   */
  methods: {
    bindBeginDateChange: function (e) {
      if (e.detail.value > this.data.endDate) {
        this.setData({
          beginDate: this.data.endDate
        })
      } else {
        this.setData({
          beginDate: e.detail.value
        })
      }
    },

    bindEndDateChange: function (e) {
      if (e.detail.value > this.data.endDate) {
        this.setData({
          endDate: this.data.lastDate
        })
      } else {
        this.setData({
          endDate: e.detail.value
        })
      }
    },

    resetDate: function () {
      this.setData({
        beginDate: this.data.initDate,
        endDate: this.data.lastDate
      })
      const date = new Date()
      const dateArr = [date.getFullYear()+"-01"+"-01", this.data.lastDate];
      this.triggerEvent("getDates", dateArr);
      this.showSelect()
    },

    submitDate: function () {
      const dateArr = [this.data.beginDate, this.data.endDate];
      this.triggerEvent("getDates", dateArr);
      this.showSelect()
    },

    showSelect: function () {
      var animation = wx.createAnimation({
        timingFunction: 'linear',
      })
      this.animation = animation
      var num = 0
      var opacity = 0
      if (this.data.yFlag == false) {
        num = 180
        opacity = 0.4
        this.setData({
          yFlag: true
        })
      } else {
        num = -360
        opacity = 0
        this.setData({
          yFlag: false
        })
      }
      animation.translateY(num).step()
      this.setData({
        animationBox: animation.export()
      })

      var animation2 = wx.createAnimation({
        timingFunction: 'linear',
      })
      this.animation2 = animation2

      animation2.opacity(opacity).step()
      this.setData({
        animationBg: animation2.export()
      })

    },
  }
})