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   源码介绍

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//index.js
//获取应用实例
const util = require('../../utils/util.js')
const app = getApp();
const defaultLogName = {
  work: '工作',
  rest: '休息'
}
const actionName = {
  stop: '停止',
  start: '开始'
}

const initDeg = {
  left: 45,
  right: -45,
}
Page({
  data: {
    remainTimeText: '',
    timerType: 'work',
    log: {},
    completed: false,
    isRuning: false,
    leftDeg: initDeg.left,
    rightDeg: initDeg.right
  },
  onShow:function(){
    if (this.data.isRuning) return
    let workTime = util.formatTime(wx.getStorageSync('workTime'), 'HH');
    let restTime = util.formatTime(wx.getStorageSync('restTime'), 'HH');
    this.setData({
      workTime: workTime,
      restTime: restTime,
      remainTimeText: workTime   ':00'
    })
  },
  //事件处理函数
  bindViewTap: function() {
    wx.navigateTo({
      url: '../logs/logs'
    })
  },
  startTimer:function(e){
    let startTime=Date.now();
    let isRuning = this.data.isRuning;
    let timerType = e.target.dataset.type;
    let showTime = this.data[timerType 'Time'];
    let keepTime = showTime*60*1000;
    let logName = this.logName || defaultLogName[timerType]
    if (!isRuning){
      this.timer = setInterval((function () {
        this.updateTimer()
        this.startNameAnimation()
      }).bind(this), 1000)
    }else{
      this.stopTimer()
    }

    this.setData({
      isRuning: !isRuning,
      completed:false,
      timerType: timerType,
      remainTimeText: showTime   ':00',
      taskName: logName
    })
    this.data.log={
      name:logName,
      startTime:Date.now(),
      keepTime:keepTime,
      endTime: keepTime   startTime,
      action: actionName[isRuning ? 'stop' : 'start'],
      type: timerType
    }

    this.saveLog(this.data.log)
  },
  stopTimer:function(){
    this.setData({
      leftDeg: initDeg.left,
      rightDeg: initDeg.right
    })
    clearInterval(this.timer);
  },
  startNameAnimation: function () {
    let animation = wx.createAnimation({
      duration: 450
    })
    animation.opacity(0.2).step()
    animation.opacity(1).step()
    this.setData({
      nameAnimation: animation.export()
    })
  },
  updateTimer:function(){
    let log=this.data.log;
    let now=Date.now();
    let remainingTime = Math.round((log.endTime - now) / 1000)
    let H = util.formatTime(Math.floor(remainingTime / (60 * 60)) % 24, 'HH')
    let M = util.formatTime(Math.floor(remainingTime / (60)) % 60, 'MM')
    let S = util.formatTime(Math.floor(remainingTime) % 60, 'SS')
    let halfTime
    if (remainingTime > 0) {
      let remainTimeText = (H === "00" ? "" : (H   ":"))   M   ":"   S
      this.setData({
        remainTimeText: remainTimeText
      })
    } else if (remainingTime == 0) {
      this.setData({
        completed: true
      })
      this.stopTimer()
      return
    }


    // update circle progress
    halfTime = log.keepTime / 2
    if ((remainingTime * 1000) > halfTime) {
      this.setData({
        leftDeg: initDeg.left - (180 * (now - log.startTime) / halfTime)
      })
    } else {
      this.setData({
        leftDeg: -135
      })
      this.setData({
        rightDeg: initDeg.right - (180 * (now - (log.startTime   halfTime)) / halfTime)
      })
    }
  },
  saveLog:function(log){
    let logs=wx.getStorageSync('logs') || [];
    logs.unshift(log);
    wx.setStorageSync('logs', logs)
  },
  changeLogName: function (e) {
    this.logName = e.detail.value
  },

})