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主页 / 问题 / 1420753
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Евгений Ключников
Евгений Ключников
Asked:2022-08-16 14:38:19 +0000 UTC2022-08-16 14:38:19 +0000 UTC 2022-08-16 14:38:19 +0000 UTC

在地图方法中单击时如何仅禁用一个按钮以及如何在 React 中的计时器到期时更改类?

  • 772

如何在地图方法中单击时仅禁用一个按钮?在禁用钩子的帮助下,按下时我拥有所有按钮。以及如何使它在计时器到期后,'current__events__hot-price disabled' 类变回'current__events__hot-price'?提前感谢您的回复!

import { useEffect, useState } from 'react'
import './CurrentEventsItem.scss'

const CurrentEventsItem = () => {

   const [timeLeft, setTimeLeft] = useState(5*60)

   const getPadTime = (time) => time.toString().padStart(2, '0')

   const minutes = getPadTime(Math.floor(timeLeft / 60))
   const seconds = getPadTime(timeLeft - minutes * 60)

    useEffect(() => {
        const interval = setInterval(() => {
            setTimeLeft((timeLeft) => (timeLeft >= 1 ? timeLeft - 1 : setDisabled(false) || 5*60))
        }, 1000)
        return () => clearInterval(interval) 
    }, [])

    const [appState, changeState] = useState({
        
        objects: [
            {id: 1, title: 'Apple iPhone 13 Pro Max 256Gb (небесно-голубой)', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false},
            {id: 2, title: '500 Stars', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false},
            {id: 3, title: 'Sony PlayStation 5 Digital Edition  ', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false}
        ]
    })


    const toggleActive = (index) => {
        let arrayCopy = [...appState.objects]

        arrayCopy[index].statusItem 
            ? (arrayCopy[index].statusItem = false) 
            : (arrayCopy[index].statusItem = true)
            setDisabled(true)

            changeState({...appState, objects: arrayCopy})
    }

    const toggleActiveStyles = (index) => {
        if (appState.objects[index].statusItem) {
            return 'current__events__hot-price disabled'
        } else {
            return 'current__events__hot-price'
        }
    }

    const toggleActiveStylesBtns = (index) => {
        if (appState.objects[index].statusItem) {
            return 'current__events__btn-green disabled'
        } else {
            return 'current__events__btn-green'
        }
    }

    const [disabled, setDisabled] = useState(false)

    return (
        <>
        <div className='current__events__wrapper'>
            {appState.objects.map((item, index) => 
                <div className="current__events__hot-price__item" key={index}>
                    <div className={toggleActiveStyles(index)}>
                        <h5 className="current__events__card-title__large">Hot Price</h5>
                    </div>
                    <div className="current__events__image">
                        <img src={item.avatar} alt='user' className="rounded-circle" width='75' height='75'/>
                    </div>
                    <div className="current__events__info">
                        <h4 className="current__events__title__middle">{item.title}</h4>
                    </div>
                    
                    <div className="current__events__timer">
                        <span>{minutes}</span>
                        <span>:</span>
                        <span>{seconds}</span>
                    </div>
                    
                    
                    <button className={toggleActiveStylesBtns(index)} onClick={() => toggleActive(index)} disabled={disabled}>СДЕЛАТЬ ХОД</button>
                        
                </div>
                
            )}
            </div>
        </>
    )
}

export default CurrentEventsItem
reactjs button
  • 1 1 个回答
  • 37 Views

1 个回答

  • Voted
  1. Best Answer
    Dmitry Kozlov
    2022-08-16T18:23:47Z2022-08-16T18:23:47Z

    我认为你根本不需要 setDisabled 钩子,如果这个标志已经存储在 statusItem 中,我们将使用它。从 setDisabled 我们将简单地创建一个将标志切换回来的函数

    const CurrentEventsItem = () => {
      const [timeLeft, setTimeLeft] = React.useState(1*10)
      const getPadTime = (time) => time.toString().padStart(2, '0')
    
      const minutes = getPadTime(Math.floor(timeLeft / 60))
      const seconds = getPadTime(timeLeft - minutes * 60)
    
      React.useEffect(() => {
        const interval = setInterval(() => {
          setTimeLeft((timeLeft) => (timeLeft >= 1 ? timeLeft - 1 : setDisabled() || 1*10))
        }, 1000)
        return () => clearInterval(interval);
      }, []);
    
      const [appState, changeState] = React.useState({
        objects: [
          {id: 1, title: 'Apple iPhone 13 Pro Max 256Gb (небесно-голубой)', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false},
          {id: 2, title: '500 Stars', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false},
          {id: 3, title: 'Sony PlayStation 5 Digital Edition  ', avatar: 'https://cdn-icons-png.flaticon.com/512/147/147144.png', statusItem: false}
        ]
      })
    
      const toggleActive = (index) => {
        let arrayCopy = [...appState.objects];
        arrayCopy[index].statusItem = !arrayCopy[index].statusItem;
        changeState({...appState, objects: arrayCopy});
      }
    
      const toggleActiveStyles = (index) => {
        if (appState.objects[index].statusItem) {
          return 'current__events__hot-price disabled'
        } else {
          return 'current__events__hot-price'
        }
      }
    
      const toggleActiveStylesBtns = (index) => {
        if (appState.objects[index].statusItem) {
          return 'current__events__btn-green disabled'
        } else {
          return 'current__events__btn-green'
        }
      }
    
      const setDisabled = () => {
        appState.objects.forEach((item, index) => {
          if (item.statusItem) {
            toggleActive(index);
          }
        });
      }
    
      return (
        <div className='current__events__wrapper'>
          {appState.objects.map((item, index) => 
            <div className="current__events__hot-price__item" key={index}>
              <div className={toggleActiveStyles(index)}>
                <h5 className="current__events__card-title__large">Hot Price</h5>
              </div>
              <div className="current__events__image">
                <img src={item.avatar} alt='user' className="rounded-circle" width='75' height='75'/>
              </div>
              <div className="current__events__info">
                <h4 className="current__events__title__middle">{item.title}</h4>
              </div>
                       
              <div className="current__events__timer">
                <span>{minutes}</span>
                <span>:</span>
                <span>{seconds}</span>
              </div>
                       
              <button className={toggleActiveStylesBtns(index)} onClick={() => toggleActive(index)} disabled={item.statusItem}>СДЕЛАТЬ ХОД</button>
            </div>
          )}
        </div>
      )
    }
    
    ReactDOM.render(<CurrentEventsItem />, document.getElementById("app"));
    .current__events__btn-green {
      background-color: green;
    }
    
    .current__events__btn-green.disabled {
      background-color: gray;
    }
    <script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script>
    <script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
    
    <div id="app"></div>

    • 0

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