applet/sph_applet/components/claim/index.js

const app = getApp();
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    user_id:{
      type: String|Number,
      value: false,
    },
    height:{
      type:String,
      value:'900rpx'
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    imgCode:'',
    minute:300,
    timer:1,
    timeMsg:'',
    isIOS:app.data.isIOS,
    writePhotosFlag:-1,
    token:''
  },
  pageLifetimes: {
    show: function(options) {
      this.getSet()
    },
    hide: function() {
      // 页面被隐藏
      clearInterval(this.data.timer)
    },
  },
  lifetimes: {
    attached: function() {
      // 在组件实例进入页面节点树时执行
      this.getToken()
      this.getSet()
    }
  },
  /**
   * 组件的方法列表
   */
  methods: {
    getSet(){
      var _this = this;
      wx.getSetting({
        success(res) {
          if(res.authSetting['scope.writePhotosAlbum'] == false){
            _this.setData({writePhotosFlag:false})
          }
          if(res.authSetting['scope.writePhotosAlbum'] == true){
            _this.setData({writePhotosFlag:true})
          }
        }
      })
    },
    CountDown() {//倒计时
      var maxtime = this.data.minute
      var minutes = '', seconds = ''
      this.setData({timeMsg:''})
      var timer = setInterval(()=>{
        if (maxtime >= 0) {
          minutes = Math.floor(maxtime / 60)<10?('0'+Math.floor(maxtime / 60)):Math.floor(maxtime / 60);
          seconds = Math.floor(maxtime % 60)<10?('0'+Math.floor(maxtime % 60)):Math.floor(maxtime % 60);
          this.setData({timeMsg: minutes + ":" + seconds + "后失效"});
          --maxtime;
        } else{
          this.setData({timeMsg:'已失效，请重新刷新'})
          clearInterval(this.data.timer);
        }
      },1000)
      this.setData({timer:timer})
    },
    getToken(){
      wx.showLoading({
        title: '加载中',
      })
      app.func.req('/api/sphClaim/getToken', 'get', {}, (res) => {
        wx.hideLoading()
        if(res && res.errno == 0){
          this.setData({
            token:res.rst.token
          })  
          wx.setStorageSync('claim_token', res.rst.token)   
          this.getEvm()       
        }else{
          wx.showToast({
            title: res.err,
            icon: 'none',
            duration: 2000
          })
        }
      },()=>{
        wx.hideLoading()
      })

      
    },
    getEvm(){
      this.setData({
        imgCode:app.data.rootDocment+'/api/sphClaim/getQRcode?token='+this.data.token,
      })
      this.CountDown()
    },
    downLoadImgEvent(){
      if(!this.data.writePhotosFlag){
        wx.openSetting()
        return
      }
      var _this = this;
      wx.getSetting({
        success(res) {
          if (!res.authSetting['scope.writePhotosAlbum']) {
            _this.setData({writePhotosFlag:false})
              wx.authorize({
              scope:'scope.writePhotosAlbum',
              success() {//授权成功
                _this.setData({writePhotosFlag:true})
                _this.downloadImg()
              },
              fail:function(err){
                _this.setData({writePhotosFlag:false})
              }
            })
          }else{//已经授权
          _this.setData({writePhotosFlag:true})
          _this.downloadImg()
          }
        }
      })
    },
    downloadImg(){
      var imgSrc = this.data.imgCode
      wx.downloadFile({
        url: imgSrc,
        success: function (res) {
          wx.saveImageToPhotosAlbum({
            filePath: res.tempFilePath,
            success: function (data) {
              wx.showToast({
                title: '保存成功',
                icon: 'success',
                duration: 2000
              })
            },
            fail: function (err) {
            },
            complete(res){
           }
          })
        }
      })
    },
    claimResetList(){
      this.triggerEvent('claimResetList')
    },
    cancelTask(){
      this.triggerEvent('closeClaimMask')
    },
  }
})