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//获得系统时间    NSDate *  senddate=[NSDate date];    NSDateFormatter  *dateformatter=[[NSDateFormatter alloc] init];    [dateformatter setDateFormat:@"HH:mm"];    NSString *  locationString=[dateformatter stringFromDate:senddate];    [dateformatter setDateFormat:@"YYYY-MM-dd-HH-mm-ss"];    NSString *  morelocationString=[dateformatter stringFromDate:senddate];        //获得系统日期    NSCalendar  * cal=[NSCalendar  currentCalendar];    NSUInteger  unitFlags= NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;    NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];    NSInteger year=[conponent year];    NSInteger month=[conponent month];    NSInteger day=[conponent day];    NSString *  nsDateString= [NSString  stringWithFormat:@"%4d年%2d月%2d日",year,month,day];

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