IOS开发笔记-取系统时间拼凑任意格式

func time_six()->String {
 let now = NSDate()
 let dformatter = DateFormatter()
 dformatter.dateFormat = "yyMMdd"   //yyyy-MM-dd HH-mm-ss
 let time_six_string = (dformatter.string(from: now as Date))
 return time_six_string
 }