在 React.js 中獲取數據到 state 組件

Question

我在應用程序組件和動物組件中渲染動物命名組件，我正在映射來自 state 的動物數組並將數據發送到卡片組件。卡片組件正在為每個動物制作卡片。基本上就像這個 App->home>card . 現在我在卡片組合中有一個刪除按鈕，我需要在單擊按鈕后將卡片動物名稱帶入應用程序組合。 我怎么能這樣做？？

我如何將 animal.name 放入 this.removeHandeler 中，以便我可以使用卡組件中的刪除按鈕刪除卡。

App component

import React, { Component } from "react";
import { BrowserRouter, Route, Routes } from "react-router-dom";
import { animals, birds } from "./component/Data";
import Navbar from "./component/Navbar";
import Home from "./component/Home";
import Animal from "./component/Animal";
import Bird from "./component/Bird";
import About from "./component/About";
import "./App.css";

export default class App extends Component {
  state = { animals: animals, birds: birds, search: "" };

  removeHandeler = (name) => {
    console.log(name);
    const UpdatedArray = this.state.animals.filter(
      (animal) => animal.name !== name
    );
    this.setState({ animals: UpdatedArray });
  };

  render() {
    return (
      <BrowserRouter>
        <Navbar />
        <Routes>
          <Route path="/" element={<Home />} />
          <Route
            path="/animal"
            element={
              <Animal
                animals={this.state.animals}
                removeCard={() => this.removeHandeler(animal.name)}
              />
            }
          />
          <Route path="/bird" element={<Bird birds={this.state.birds} />} />
          <Route path="/about" element={<About />} />
        </Routes>
      </BrowserRouter>
    );
  }
}

動物成分

import React from "react";
import Card from "./Card";
const animal = ({ animals, removeCard }) => {
  const animalList = animals.map((animal) => {
    return (
      <Card
        name={animal.name}
        likes={animal.likes}
        key={animal.name}
        removeCard={removeCard}
      />
    );
  });

  return (
    <div className="container">
      <div>
        <h1> Animal List</h1>
        <input />
      </div>
      <div className="animalList_container "> {animalList} </div>
    </div>
  );
};

export default animal;

卡片組件

import React from "react";

const Card = (props) => {
  return (
    <div className="card">
      <div className="image_wrapper">
        <button className="removeButton" onClick={props.removeCard}>
          X
        </button>
        <img
          src={`https://source.unsplash.com/500x400/?${props.name} `}
          alt={`${props.name} `}
        />{" "}
      </div>
      <div className="animal_info">
        <h2>{props.name[0].toUpperCase() + props.name.slice(1)}</h2>
        <div className="social_wrapper">
          <button onClick={props.removeLikes}> Remove </button>
          <p>{props.likes} &#9829;</p>
          <button onClick={props.addLikes}> Add like </button>
        </div>
      </div>
    </div>
  );
};

export default Card;

Answer 1

您的Card組件具有動物的名稱，因此您可以從那里調用removeHandeler function。 只需像這樣在Animal道具中傳遞它：

<Animal
    animals={this.state.animals}
    removeCard={this.removeHandeler.bind(this)}
/>

在Card組件中，在onClick中調用它：

<button className="removeButton" onClick={() => {props.removeCard(props.name)}}>