dateformatter,

 NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];

    dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";

    NSDate *date1 = [dateFormatter dateFromString:order.flightOrder.beginDateTime];

    

    NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];

    dateFormatter1.dateFormat = @"yyyy年MM月dd日 HH:mm";

    NSString *dateStr = [dateFormatter1 stringFromDate:date1];

    self.dateLabel.text = dateStr;