// 日期转化为“年-月-日”格式dateToString(date){var year = date.getFullYear()var month =(date.getMonth()+1).toString()var day = date.getDate().toString()if(month.length ==1){
month ='0'+ month
}if(day.length ==1){
day ='0'+ day
}var dateTime = year +'-'+ month +'-'+ day
return dateTime
}