NSString*orderDate = @"1489373937000";

[self timestampSwitchTime:orderDate];

-(NSString*)timestampSwitchTime:(NSString*)timestamp

{

NSDateFormatter*formatter = [[NSDateFormatter alloc]init];

[formatter setDateStyle:NSDateFormatterMediumStyle];

[formatter setTimeStyle:NSDateFormatterShortStyle];

[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

NSDate*timeDate = [NSDate dateWithTimeIntervalSince1970:[timestamp floatValue]/1000];

NSString*confromTimespStr = [formatter stringFromDate:timeDate];

return confromTimespStr;

}