在反应中添加悬停红十字删除功能

Question

所以我从api获得数据并映射到它们上以呈现这些图像：

所以我正在尝试执行此项目，现在我基本上陷入了困境，我的反应和CSS不太好，但是我正在学习，现在我想做的就是添加删除功能。我创建了一个函数，当我单击图像时，该函数会从数据中删除图片，但是我想要的是，当我将鼠标悬停在图像上时，会出现一个红叉，当我按下该红叉时，我可以触发该函数并删除图像

代码：

import React,{useState,useEffect,useReducer} from 'react';
import axios from 'axios';
import {useForm} from 'react-hook-form';

const Data = () => {

    const [photo,setPhoto] = useState([])

    useEffect(() => {
        axios.get("https://jsonplaceholder.typicode.com/photos").then(
            result => {
                setPhoto(result.data)
            }
        )
    },[])

    const [Url,setUrl] = useState()
    const[photoId,setPhotoId] = useState()

    const showPicture = (url,id) => {
        setUrl(url)
        setPhotoId(id)
    }


    const handleDelete = id => {
        setUrl(null);
        setPhoto(prevState => prevState.filter(x => x.id !== id));
      };

      const {register,handleSubmit,errors} = useForm();
      const [links,setLinks] = useState({
          link:'',
          thumbnailLink:'',
          title:''
        })

        const onSubmit = (data) => {
            console.log(data)
        };

    return(
        <div>
            <div><img src={Url} onClick={() => handleDelete(photoId)}></img></div>
            <div>Posts</div>
            {/* <p>enter album Id to see the magic</p><input type="text" value={albumId} onChange={e => setAlbumId(e.target.value)}></input>
            <button type="button" onClick={handleClick}>Fetch Album</button> */}
            <div className="container">
            <div>{photo.slice(0,3).map(p => 
                 <div key={p.id}>
                    <img src={p.thumbnailUrl} thumbnailUrl={p.thumbnailUrl} onClick={() => showPicture(p.url,p.id)}></img>
                        <div>{p.title}</div>
                </div>
            )}</div>
            </div>
                <form onSubmit={handleSubmit(onSubmit)}>
                    <input type="url" placeholder="link" name="link" ref={register}/>
                    <input type="url" placeholder="thumbnail url" name="thumbnail" ref={register}/>
                    <input type="text" placeholder="title" name="title" ref={register}/>
                    <input type="submit" />
                </form>
        </div>

    )
}

export default Data;

Answer 1

您需要做的就是在删除按钮上添加一个类名，默认情况下，将其css设置为display: none，并将其悬停属性设置为display: unset，它应该像魔术一样工作。

我试图将其应用于您的代码。

我刚用x添加了div并使用了箭头功能，所以我可以传递照片的ID：

<div className='container-delete' onClick={e => this.handleDelete(p.id)}>X</div>

和css样式：

.container-delete {
 display: none;
 color: red;
}

.container-delete {
 display: unset;
}

这里是完整的代码（只需在您的css文件中添加css以进行隐藏和显示）：

import React,{useState,useEffect,useReducer} from 'react';
import axios from 'axios';
import {useForm} from 'react-hook-form';

const Data = () => {

    const [photo,setPhoto] = useState([])

    useEffect(() => {
        axios.get("https://jsonplaceholder.typicode.com/photos").then(
            result => {
                setPhoto(result.data)
            }
        )
    },[])

    const [Url,setUrl] = useState()
    const[photoId,setPhotoId] = useState()

    const showPicture = (url,id) => {
        setUrl(url)
        setPhotoId(id)
    }


    const handleDelete = id => {
        setUrl(null);
        setPhoto(prevState => prevState.filter(x => x.id !== id));
      };

      const {register,handleSubmit,errors} = useForm();
      const [links,setLinks] = useState({
          link:'',
          thumbnailLink:'',
          title:''
        })

        const onSubmit = (data) => {
            console.log(data)
        };

    return(
        <div>
            <div><img src={Url} onClick={() => handleDelete(photoId)}></img></div>
            <div>Posts</div>
            {/* <p>enter album Id to see the magic</p><input type="text" value={albumId} onChange={e => setAlbumId(e.target.value)}></input>
            <button type="button" onClick={handleClick}>Fetch Album</button> */}
            <div className="container">
            <div>{photo.slice(0,3).map(p => 
                 <div key={p.id}>
                    <img src={p.thumbnailUrl} thumbnailUrl={p.thumbnailUrl} onClick={() => showPicture(p.url,p.id)}></img>
                    <div>{p.title}</div>
                    <div className='container-delete' onClick={e => this.handleDelete(p.id)}>X</div>
                </div>
            )}</div>
            </div>
                <form onSubmit={handleSubmit(onSubmit)}>
                    <input type="url" placeholder="link" name="link" ref={register}/>
                    <input type="url" placeholder="thumbnail url" name="thumbnail" ref={register}/>
                    <input type="text" placeholder="title" name="title" ref={register}/>
                    <input type="submit" />
                </form>
        </div>

    )
}

export default Data;

Answer 2

您可以检查此

          {photo.slice(0, 3).map(p => (
            <div key={p.id} onClick={() => deleteIt(p)}>
              <img
                alt="theme"
                src={p.thumbnailUrl}
                thumbnailUrl={p.thumbnailUrl}
                onClick={() => showPicture(p.url, p.id)}
              />
              <div>{p.title}</div>
            </div>
          ))}

删除功能

  const deleteIt = item => {
    let filtered = photo.filter(p => p.id !== item.id);
    setPhoto(filtered);
  };

Live working demo