微信小程序 时间戳距当前时间的长度

注意：传入的dateTimeStamp时间戳以秒计时。如你想传以毫秒计时的值时先除1000

getDateDiff:function (dateTimeStamp) {

  var minute =  60

  var hour = minute * 60

  var day = hour * 24

  var halfamonth = day * 15

  var month = day * 30

  var now = Date.parse(new Date())/1000   //有些特殊 不能使用 new Date()

  var diffValue = now - dateTimeStamp

  if(diffValue <0){return}

  var monthC =diffValue/month

  var weekC =diffValue/(7*day)

  var dayC =diffValue/day

  var hourC =diffValue/hour

  var minC =diffValue/minute

  var result = ''

  if(monthC >= 1){

      result="" + parseInt(monthC) + "月前"

  }

  else if(weekC>=1){

      result="" + parseInt(weekC) + "周前"

  }

  else if(dayC>=1){

      result=""+ parseInt(dayC) +"天前"

  }

  else if(hourC>=1){

      result=""+ parseInt(hourC) +"小时前"

  }

  else if(minC>=1){

      result=""+ parseInt(minC) +"分钟前"

  }else{

      result="刚刚"

  }

  return result

}//时间戳转化为几天前，几小时前，几分钟前

Date.prototype.Format=function(formatStr){return formatStr.replace(/yyyy|YYYY/,this.getFullYear()).replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100)).replace(/MM/,(this.getMonth()+1)>9?(this.getMonth()+1).toString():'0' + (this.getMonth()+1)).replace(/M/g,(this.getMonth()+1)).replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate()).replace(/d|D/g,this.getDate()).replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours()).replace(/h|H/g,this.getHours()).replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes()).replace(/m/g,this.getMinutes()).replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds()).replace(/s|S/g,this.getSeconds()).replace(/w|W/g,['日','一','二','三','四','五','六'][this.getDay()])}

var timer=Date.parse("12/30/2017 12:00:00")

alert( new Date(timer).Format("YYYY年MM月DD")   ) //2017年12月30

alert( new Date(timer).Format("YYYY年MM月DD日 HH时mm分SS秒 星期W")  ) //2017年12月30日 12时00分00秒 星期六

Date.parseDate是将字符串转为Date：

Date.parseDate('2013-01','Y-m') //结果Mon Jan 28 00:00:00 UTC+0800 2013（Date）

Ext.util.Format.date()是将日期类型转换为字符串

Ext.util.Format.date('2013/1/28 0:00:00','Y-m') //结果是"2013-01"

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