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1. 事例1: 小程序订单小票

2. 事例2:订单概况时刻格局化

I. 事例1: 小程序订单小票

需求：小程序订单打印模板优化，头部增加配送订单、自提订单；自提订单增加显现自提时刻，配送订单无需显现。

订单接口数据格局：

      "selfMentionEndTime" : "2022-05-18 10:08:03",
      "selfMentionStartTime" : "2022-05-18 10:08:03",

完成：

    if(detaiModel.deliveryMethod.intValue == QCTOrderdeliveryMethod4To_the_shop_self_mention){//自提
        [command addSetJustification:0];// * @param n 左 中 右对齐，0左对齐,1中心对齐,2右对齐
        [command addPrintMode: 0x0];
        //自提时刻 YY- MM- DD hh:mm - hh:mm
        NSString *start = detaiModel.delivery.selfMentionStartTime;
//        时刻格局化
        start = [QCT_Common strdatedateFormat:@"yyyy-MM-dd HH:mm" fromDateFormat:@"yyyy-MM-dd HH:mm:ss" objstr:start];
        NSString *end = detaiModel.delivery.selfMentionEndTime;
        end = [QCT_Common strdatedateFormat:@"HH:mm" fromDateFormat:@"yyyy-MM-dd HH:mm:ss" objstr:end];
       [command addText:[NSString stringWithFormat:@"提货时刻：%@-%@\n",start,end]];
        [command addPrintAndLineFeed];
   }

II 事例2:订单概况时刻格局化

• 20210330105712->2021-03-30 10:57:12

同理2020年01月01日转成2020-01-01 ，可利用NSDateFormatter先把2020年01月01日字符串转NSDate,再把NSDate转成2020-01-01 字符串

            payinfomodel.createTime  = [QCT_Common strdatedateFormat:@"yyyy-MM-dd HH:mm:ss" fromDateFormat:@"yyyyMMddHHmmss" objstr:refund_time_];// 格局化时刻戳

III 代码完成

+ (NSString *)strdatedateFormat:(NSString*)toDateFormat fromDateFormat:(NSString *)fromDateFormat objstr:(NSString*)objstr{
    NSString *tmpbirthday = @"";
    if(![NSStringQCTtoll isBlankString:objstr]){
        tmpbirthday = objstr;
        tmpbirthday  = [QCT_Common date4ateFormat:toDateFormat withdate:[QCT_Common dateWithFormatterString:tmpbirthday dateFormat:fromDateFormat]];
    }
    return tmpbirthday;
}
+ (NSString *)date4ateFormat:(NSString *)DateFormat withdate:(NSDate *)date{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    [formatter setDateFormat:DateFormat];
    return [formatter stringFromDate:date];
}
+ (NSDate*)dateWithFormatterString:(NSString*)dateWithString dateFormat:(NSString*)dateFormat {
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    dateFormatter.dateFormat = dateFormat;
    NSDate *date = [dateFormatter dateFromString:dateWithString];
    return date;
}

IV 前置知识

4.1 指定时区

为了保证都是东八区的时刻，格局化时设置东八时区。

// 处理时刻
- (NSString *)timeStampConversionNSString:(NSString *)timeStamp
{
    //
    //咱们也能够规则必定运用某一个时区：
    NSDate *date = [NSDate date];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy.MM.dd HH:mm:ss"];
    formatter.timeZone = [NSTimeZone timeZoneWithName:@"Asia/Shanghai"];//东八区时刻
    //这样不论咱们的手机是在哪里，打印出来的时刻都是东八区的时刻
    //    formatter.timeZone = [NSTimeZone timeZoneWithName:@"Asia/Tokyo"];//东九区时刻
    //    formatter.timeZone = [NSTimeZone timeZoneWithName:@"GMT"];//零区时刻
    //    formatter.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];//零区时刻，和GMT相同
//    NSString *dateStr = [formatter stringFromDate:date];
    NSLog(@"字符串时刻 = %@", dateStr);
    // 假如包括下午，则去除
    NSString *tmpdate=  [formatter stringFromDate:date];
    tmpdate = [tmpdate stringByReplacingOccurrencesOfString:@"下午" withString:@""];
    tmpdate = [tmpdate stringByReplacingOccurrencesOfString:@"上午" withString:@""];
    return tmpdate;
}

4.2 NSDate转NSString

NSDate->NSString

+ (NSString *)date4YYMMDD:(NSDate *)date{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    return [formatter stringFromDate:date];
}
+ (NSString *)date4YYMM:(NSDate *)date{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    [formatter setDateFormat:@"yyyy-MM"];
    return [formatter stringFromDate:date];
}