通过拖放创建全天事件

Question

我使用react-big-calendar 来安排可用性和不可用性。我可以通过单击相应的日期单元格来创建一天的时间表。但是，我的要求是通过拖放方法创建计划。就像如果我无法从 Nov17 - Nov25 获得，那么我应该能够从 Nov17 and drop to Nov25 拖动以将那些日子创建为我无法获得的事件。

我无法完成它。

这就是我所做的

https://codesandbox.io/s/upbeat-engelbart-sfsnh

这里是代码

import React from "react";
import { Calendar, momentLocalizer } from "react-big-calendar";
import moment from "moment";
import withDragAndDrop from "react-big-calendar/lib/addons/dragAndDrop";
import "react-big-calendar/lib/css/react-big-calendar.css";
import "react-big-calendar/lib/addons/dragAndDrop/styles.css";

const DnDCalendar = withDragAndDrop(Calendar);

const localizer = momentLocalizer(moment);

const events = [
  {
    id: 0,
    title: "All Day Event very long title",
    allDay: true,
    start: new Date(2015, 3, 0),
    end: new Date(2015, 3, 1)
  },
  {
    id: 1,
    title: "Long Event",
    start: new Date(2015, 3, 7),
    end: new Date(2015, 3, 10)
  },

  {
    id: 2,
    title: "DTS STARTS",
    start: new Date(2016, 2, 13, 0, 0, 0),
    end: new Date(2016, 2, 20, 0, 0, 0)
  },

  {
    id: 3,
    title: "DTS ENDS",
    start: new Date(2016, 10, 6, 0, 0, 0),
    end: new Date(2016, 10, 13, 0, 0, 0),
    desc: "Description is shown here"
  },

  {
    id: 4,
    title: "Leave",
    start: new Date(new Date().setHours(new Date().getHours() - 3)),
    end: new Date(new Date().setHours(new Date().getHours() + 3)),
    desc: "Description is shown here"
  }
];

const onEventDrop = ({ event, start, end, allDay }) => {
  console.log("event clicked");
  console.log(start, event, end, allDay);
};

const Scheduler = () => {
  return (
    <>
      <div className="wrapper" style={{ minHeight: "100vh" }}>
        <DnDCalendar
          selectable
          events={events}
          startAccessor="start"
          endAccessor="end"
          defaultDate={moment().toDate()}
          localizer={localizer}
          toolbar
          resizable
          onEventDrop={onEventDrop}
          components={{
            event: EventComponent,
            agenda: {
              event: EventAgenda
            }
          }}
          onSelectSlot={() => console.log("selected")}
          onSelectEvent={event => alert(event.desc)}
        />
      </div>
    </>
  );
};

export default Scheduler;

const EventComponent = ({ start, end, title }) => {
  return (
    <>
      <p>{title}</p>
      <p>{start}</p>
      <p>{end}</p>
    </>
  );
};

const EventAgenda = ({ event }) => {
  return (
    <span>
      <em style={{ color: "magenta" }}>{event.title}</em>
      <p>{event.desc}</p>
    </span>
  );
};

Answer 1

由于你的 events 数组是动态的，它不应该存储在静态变量中，而是作为 props 传递给组件或存储在组件的状态中，这样每次更新数组都会生成重新渲染.

我已经在您的代码沙箱中分叉了一个工作示例：https://codesandbox.io/s/gifted-lehmann-xinxc

这里是主要变化（使用 React.useState 钩子在组件状态中存储动态事件数组）：

const Scheduler = () => {
  const [ events, setEvents ] = React.useState(initialEvents);

  const addEvent = ({ event, start, end, allDay }) => {
    const newEvent = {
      id: events.length,
      title: "New event",
      start: new Date(new Date(start).setHours(new Date().getHours() - 3)),
      end: new Date(new Date(end).setHours(new Date().getHours() + 3)),
      desc: "This is a new event"
    }

    setEvents(state => [ ...state, newEvent ]);
  };

  return (
    <>
      <div className="wrapper" style={{ minHeight: "100vh" }}>
        <DnDCalendar
          selectable
          events={events}
          startAccessor="start"
          endAccessor="end"
          defaultDate={moment().toDate()}
          localizer={localizer}
          toolbar
          resizable
          onEventDrop={onEventDrop}
          components={{
            event: EventComponent,
            agenda: {
              event: EventAgenda
            }
          }}
          onSelectSlot={addEvent}
          onSelectEvent={event => alert(event.desc)}
        />
      </div>
    </>
  );
};

export default Scheduler;