格林尼治时间转普通格式，兼容ios不支持“-”的问题

change(time) {
    let date = time.substr(0, 10)
    let hours = time.substring(11, 13)
    let minutes = time.substring(14, 16)
    let seconds = time.substring(17, 19)
    let timeFlag = date + ' ' + hours + ':' + minutes + ':' + seconds
    timeFlag = timeFlag.replace(/-/g, "/")
    timeFlag = new Date(timeFlag)
    timeFlag = new Date(timeFlag.getTime() + 8 * 3600 * 1000)
    timeFlag = timeFlag.getFullYear() + '-' + ((timeFlag.getMonth() + 1) < 10 ? "0" + (timeFlag.getMonth() + 1) : (
    timeFlag.getMonth() + 1)) + '-' + (timeFlag.getDate() < 10 ? "0" + timeFlag.getDate() : timeFlag.getDate()) + ' ' +
    timeFlag.getHours() + ':' + timeFlag.getMinutes() + ':' + (timeFlag.getSeconds() < 10 ? "0" + timeFlag.getSeconds() :
    timeFlag.getSeconds())
    return timeFlag
}