选中所有复选框React

Question

大家好，我有这个模块

import React, { Component } from 'react'
import EmailListItem from './EmailListItem'
import { createContainer } from 'meteor/react-meteor-data'
import { Emails } from '../../../../../imports/collections/emails/Emails'

class EmailList extends Component {
  constructor (props) {
    super(props)
    this.state = {
      selectedEmails: new Set(),
      checked: false
    }
  }

  handleSelectedEmails (selectedEmail, checked) {
    let selectedEmails = this.state.selectedEmails
    if (checked) {
      selectedEmails.add(selectedEmail)
    } else {
      selectedEmails.delete(selectedEmail)
    }
    this.setState({selectedEmails})
    console.log('selectedEmails', this.state.selectedEmails)
  }
  removeSelected () {
    const selectedEmails = Array.from(this.state.selectedEmails)
    Meteor.call('emails.remove', selectedEmails, (err, result) => {
      if (err) console.log(err)
      if (result) console.log(result)
    })
  }
  checkedClick () {
    this.setState({checked: !this.state.checked})
    console.log('chcekedClick')
  }
  renderList () {
    console.log(this.props)
    return this.props.emails.map(email => {
      console.log(email)
      const { name, opr, ctr, _id } = email
      const createdAt = email.createdAt.toDateString()
      const link = `/dashboard/emailpreview/${_id}`
      return (
        <EmailListItem
          selecetedAllEmails={this.state.checked}
          handleSelectedEmails={this.handleSelectedEmails.bind(this)}
          name={name}
          createdAt={createdAt}
          opr={opr}
          ctr={ctr}
          link={link}
          key={email._id}
          id={email._id} />
        )
    })
  }
  render () {
    // TODO: make checks with state
    return (
      <div className="email_list">
        <table>
          <thead>
            <tr>
              <td><input onChange={this.checkedClick.bind(this)} type="checkbox" checked={this.state.checked} /></td>
              <td>Title<button onClick={this.removeSelected.bind(this)} className="btn btn-danger">Remove</button></td>
              <td>Dates</td>
              <td>Open Rates</td>
              <td>CTA</td>
            </tr>
          </thead>
          <tbody>
            {this.renderList()}
          </tbody>
        </table>

      </div>
  )
  }
}

export default createContainer(() => {
  Meteor.subscribe('emails')
  return { emails: Emails.find({}).fetch() }
}, EmailList)

它呈现了这个模块

import React, { Component } from 'react'
import { Link } from 'react-router'

class EmailListItem extends Component {
  constructor (props) {
    super(props)
    this.state = {
      checked: false
    }
  }

  checkedClick () {
    this.setState({checked: !this.state.checked})
    console.log('chcekedClick')
  }

  componentDidUpdate () {
    console.log('componentDidUpdate')
    const { myCheckbox } = this.refs
    console.log('myCheckbox', myCheckbox)
    console.log('myCheckbox.name', myCheckbox.name)
    console.log('myCheckbox.checked', myCheckbox.checked)
    if (this.props.selecetedAllEmails) {
      console.log('componentDidUpdate IF')
      this.checkedClick()
      this.props.handleSelectedEmails(myCheckbox.name, myCheckbox.checked)
    }
  }
  render () {
    console.log('_id', this.props.id)
    return (
      <tr>
        <td><input ref="myCheckbox"
          onChange={(event) => {
            this.checkedClick()
            this.props.handleSelectedEmails(event.target.name, event.target.checked)
          }}
          checked={this.state.checked}
          type="checkbox" name={this.props.id} /></td>
        <td><Link to={this.props.link}>{this.props.name}</Link></td>
        <td>{this.props.createdAt}</td>
        <td>Open Rates</td>
        <td>CTA</td>
      </tr>
    )
  }
}

export default EmailListItem

正如您在每个电子邮件项目中看到的，我有一个复选框。我可以选择几个复选框，然后单击该删除按钮，该按钮将调用删除我选择的项目。现在在顶部我有一个复选框，应该选中所有复选框。我的解决方案是检查全局复选框并将其作为道具传递给所有项目。然后在项目中我对componentDidUpdate执行检查，如果选中了全局复选框，那么我也会检查该项目。但这会导致无限循环。请问这里最好的解决方案是什么？ 提前谢谢大家！

Answer 1

虽然一些答案提供了选择所有复选框的特定功能，但我还需要常见功能，例如取消选择全部，选择全部然后取消选择一些，当手动选择所有选择所有框检查时...等等我写了所有这些并将其作为答案发布在这里。感谢所有回复的人。此代码基于Mayank Shuklas的回答。请注意，它可能仍然不完美，因为我还没有对其进行适当的测试，但肯定需要进行一些重构。

import React, { Component } from 'react'
import EmailListItem from './EmailListItem'
import { createContainer } from 'meteor/react-meteor-data'
import { Emails } from '../../../../../imports/collections/emails/Emails'

class EmailList extends Component {
  constructor (props) {
    super(props)
    this.state = {
      selectedEmails: new Set(),
      checked: false
    }
  }

  handleSelectedEmails (allSelected, individualSelected, selectedEmail, checked) {
    console.log('allSelected', allSelected)
    console.log('individualSelected', individualSelected)
    console.log('selectedEmail', selectedEmail)
    console.log('checked', checked)
    let selectedEmails = this.state.selectedEmails
    if (allSelected && !individualSelected) {
        this.props.emails.forEach((email) => {
          selectedEmails.add(email._id)
        })
    } else if (!allSelected && !individualSelected) {
      selectedEmails.clear()
    } else if (individualSelected) {
      if (checked) {
        selectedEmails.add(selectedEmail)
        if (selectedEmails.size === this.props.emails.length) {
          this.checkAll()
        }
      } else {
        selectedEmails.delete(selectedEmail)
        this.setState({checked})
      }
    }
    this.setState({selectedEmails})
    console.log('selectedEmails', this.state.selectedEmails)
  }
  removeSelected () {
    const selectedEmails = Array.from(this.state.selectedEmails)
    Meteor.call('emails.remove', selectedEmails, (err, result) => {
      if (err) console.log(err)
      if (result) console.log(result)
    })
  }
  checkAll () {
    this.setState({checked: !this.state.checked})
    console.log('chcekedClick', this.state.checked)
    this.handleSelectedEmails(!this.state.checked, false)
  }
  renderList () {
    console.log(this.props)
    return this.props.emails.map(email => {
      // console.log(email)
      const { name, opr, ctr, _id } = email
      const createdAt = email.createdAt.toDateString()
      const link = `/dashboard/emailpreview/${_id}`
      return (
        <EmailListItem
          handleSelectedEmails={this.handleSelectedEmails.bind(this)}
          name={name}
          createdAt={createdAt}
          opr={opr}
          ctr={ctr}
          link={link}
          key={email._id}
          id={email._id}
          value={this.state.checked || this.state.selectedEmails.has(email._id)} />
        )
    })
  }
  render () {
    // TODO: make checks with state
    return (
      <div className="email_list">
        <table>
          <thead>
            <tr>
              <td><input onChange={this.checkAll.bind(this)} type="checkbox" checked={this.state.checked} /></td>
              <td>Title<button onClick={this.removeSelected.bind(this)} className="btn btn-danger">Remove</button></td>
              <td>Dates</td>
              <td>Open Rates</td>
              <td>CTA</td>
            </tr>
          </thead>
          <tbody>
            {this.renderList()}
          </tbody>
        </table>

      </div>
  )
  }
}

export default createContainer(() => {
  Meteor.subscribe('emails')
  return { emails: Emails.find({}).fetch() }
}, EmailList)

和EmailListItem

import React, { Component } from 'react'
import { Link } from 'react-router'

class EmailListItem extends Component {
  render () {
    console.log('_id', this.props.id)
    return (
      <tr>
        <td><input ref="myCheckbox"
          onChange={(event) => {
            this.props.handleSelectedEmails(false, true, event.target.name, event.target.checked)
          }}
          checked={this.props.value}
          type="checkbox" name={this.props.id} /></td>
        <td><Link to={this.props.link}>{this.props.name}</Link></td>
        <td>{this.props.createdAt}</td>
        <td>Open Rates</td>
        <td>CTA</td>
      </tr>
    )
  }
}

export default EmailListItem

Answer 2

我认为，不需要为每个电子邮件ID维护个别状态，您已将值存储在parent组件中，从parent中的props传递值，其他的是为了选择所有的电子邮件ID，你在父母中保持一个bool，在传递道具值时检查bool，如果bool为真则传递true否则检查set并传递set返回的结果。

检查jsfiddle的工作解决方案：https://jsfiddle.net/h17mcjwa/

试试这个renderList方法：

renderList () {
 return this.props.emails.map(email => {
      const { name, opr, ctr, _id } = email
      const createdAt = email.createdAt.toDateString()
      const link = `/dashboard/emailpreview/${_id}`
      return (
        <EmailListItem
          handleSelectedEmails={this.handleSelectedEmails.bind(this)}
          name={name}
          createdAt={createdAt}
          opr={opr}
          ctr={ctr}
          link={link}
          key={email._id}
          id={email._id} 
          value={this.state.checked || this.state.selectedEmails.has(email._id)}
        />
      )
   })
 }

并使用此组件：

class EmailListItem extends Component {
  constructor (props) {
    super(props)
    //this.state = {
    //  checked: false
    //}
  }

  //checkedClick () {
  //  this.setState({checked: !this.state.checked})
  //  console.log('chcekedClick')
  //}

  //componentDidUpdate () {
  //  if (this.props.selecetedAllEmails) {
  //    this.checkedClick()
  //    this.props.handleSelectedEmails(myCheckbox.name, myCheckbox.checked)
  //  }
  //}

  render () {
    return (
      <tr>
        <td><input ref="myCheckbox"
          onChange={(event) => {
            this.props.handleSelectedEmails(event.target.name, event.target.checked)
          }}
          checked={this.props.value}
          type="checkbox" name={this.props.id} /></td>
        <td><Link to={this.props.link}>{this.props.name}</Link></td>
        <td>{this.props.createdAt}</td>
        <td>Open Rates</td>
        <td>CTA</td>
      </tr>
    )
  }
}

如果它对你不起作用，请告诉我。

Answer 3

您可以使用componentWillReceiveProps代替componentDidUpdate：

class EmailListsItem extends Component {
  // ...
  componentWillReceiveProps (nextProps) {
    const { myCheckbox } = this.refs

    // if selecetedAllEmails is updated from false to true
    if (nextProps.selecetedAllEmails && !this.props.selecetedAllEmails) {
      this.checkedClick()
      this.props.handleSelectedEmails(myCheckbox.name, myCheckbox.checked)
    }
  }
  // ...
}