找不到构造函数“Jiffy”

Question

我的代码如您在上面看到的。但是“ timeAgo: Jiffy(json['date']).add(hours: 6).fromNow(),”我的代码在 Jiffy 所在的位置给出了错误。错误的解决方法是怎样的？如果有人知道，如果您通过更改我的代码向我展示错误的解决方案，我将非常感激。

import 'package:easy_localization/easy_localization.dart';
import 'package:jiffy/jiffy.dart';
import 'package:wordpress_app/config/wp_config.dart';

class Article {
  final int? id;
  final String? title;
  final String? content;
  final String? image;
  final String? video;
  final String? author;
  final String? avatar;
  final String? category;
  final String? date;
  final String? timeAgo;
  final String? link;
  final int? catId;
  final List? tags;

  Article(
      {this.id,
      this.title,
      this.content,
      this.image,
      this.video,
      this.author,
      this.avatar,
      this.category,
      this.date,
      this.timeAgo,
      this.link,
      this.catId,
      required this.tags});


  factory Article.fromJson(Map<String, dynamic> json){
    return Article(
      id: json['id'] ?? 0,
      title: json['title']['rendered'] ?? '',
      content: json['content']['rendered'] ?? '',
      image: json['custom']["featured_image"] != false
        ? json['custom']["featured_image"]
        : WpConfig.randomPostFeatureImage,
      video: json['custom']['td_video'] ?? '',
      author: json['custom']['author']['name'] ?? '',
      avatar: json['custom']['author']['avatar'] ?? 'https://icon-library.com/images/avatar-icon/avatar-icon-27.jpg',
      date: DateFormat('dd MMMM, yyyy', 'en_US')
        .format(DateTime.parse(json["date"]))
        .toString(),

        //Jiffy.parse('date').fromNow(),
            //timeAgo: Jiffy(json["date"]).fromNow(),
      timeAgo: Jiffy(json['date']).add(hours: 6).fromNow(),
      link: json['link'] ?? 'empty',
      category: json["custom"]["categories"][0]["name"] ?? '',
      catId: json["custom"]["categories"][0]["cat_ID"] ?? 0,
      tags: json['tags']

    );
  }


}

Answer 1

问题：

您的代码会出现错误：

Couldn't find constructor 'Jiffy'

，因为 jiffy 包的

API 参考

中没有 Jiffy() 构造函数，如本行中所用：

timeAgo: Jiffy(json['date']).add(hours: 6).fromNow(),

解决方案：

使用 Jiffy.parse() 构造函数从

json

解析日期字符串，如下所示：

timeAgo: Jiffy.parse(json['date']).add(hours: 6).fromNow();