如何在React中实现多个按钮，当你点击一个按钮时，所有其他按钮都被取消选中

Question

我试图实现3个按钮，这样一旦一个被点击，它改变背景颜色，和其他2个按钮被取消选择，他们的背景颜色恢复到原来的颜色。

然而，当我试图在React中实现它时，它总是在1个按钮后面(从某种意义上说，如果我按顺序单击按钮1,3,2，我将选择按钮为1,3(不是打字错误，它只是在后面))。

这是我为特定组件编写的代码。

import React, { useEffect } from "react";
import '../output.css'
import Full from '../Logos/Full.png';
import logo from "../logo.svg";
import Images from "./Images";
import { ImageLogo as Img } from "./Images";
export default function Events() {
const button_colour = "bg-red-700";
let [colour, setColour] = React.useState("");
let [colour1, setColour1] = React.useState("");
let [colour2, setColour2] = React.useState("");
const [backgroundColor, setBackgroundColor] = React.useState('transparent');
const [backgroundColor1, setBackgroundColor1] = React.useState('transparent');
const [backgroundColor2, setBackgroundColor2] = React.useState('transparent');
function handleClick(i: number) {
console.log(`${i} and ${backgroundColor} and ${backgroundColor1} and ${backgroundColor2}`)
switch (i) {
case 0:
setBackgroundColor(button_colour);
setBackgroundColor1('transparent');
setBackgroundColor2('transparent');
case 1:
setBackgroundColor('transparent');
setBackgroundColor1(button_colour);
setBackgroundColor2('transparent');
case 2:
setBackgroundColor('transparent');
setBackgroundColor1('transparent');
setBackgroundColor2(button_colour);
}
}
// Create 3 refs
const ref1 = React.useRef(null);
const ref2 = React.useRef(null);
const ref3 = React.useRef(null);
const refs = [ref1, ref2, ref3];
useEffect(() => {
// console.log(colour);
}, [colour, colour1, colour2]);
const changeColour = (index: number) => {
let newColour = [colour, colour1, colour2];
for (let i = 0; i < 3; i++) {
if (i !== index) {
newColour[i] = "";
} else {
newColour[i] = button_colour;
}
}
// Remove button_colour from all refs
for (let i = 0; i < 3; i++) {
if (refs[i].current) {
refs[i].current.className = refs[i].current.className.replace(button_colour, "");
}
}
setColour(newColour[0]);
setColour1(newColour[1]);
setColour2(newColour[2]);
console.log(newColour);
if (ref1.current) {
ref1.current.className += " " + colour;
}
if (ref2.current)
ref2.current.className += " " + colour1;
if (ref3.current)
ref3.current.className += " " + colour2;
console.log(`Colours are ${colour}, ${colour1}, ${colour2}`);
}
const k = (i: number) => {
// console.log(`Hi, it's ami ${colour}, ${colour1}, ${colour2}`);
return 1;
}
return (
<div className="">
<h1 className="text-white font-bold text-center">EVENT SCHEDULE</h1>
<div className="Dates flex text-yellow-800 font-bold justify-center h-15-s">
{/* <p className="w-1.5/12 text-center h-4/6 hover:button_colour rounded-md" onClick={e => changeColour(0)} ref={ref1}>January 10th</p> */}
{/* <button onClick={e => handleClick(0)} style={{ backgroundColor }}>January 10th</button>
<button onClick={e => handleClick(1)} style={{ backgroundColor: backgroundColor1 }}>January 11th</button>
<button onClick={e => handleClick(2)} style={{ backgroundColor: backgroundColor2 }}>January 12th</button> */}
<p className="w-1.5/12 text-center h-4/6 hover:button_colour rounded-md" onClick={e => changeColour(0)} ref={ref1}>January 11th</p>
<p className="w-1.5/12 text-center h-4/6 hover:button_colour rounded-md" onClick={e => changeColour(1)} ref={ref2}>January 11th</p>
<p className="w-1.5/12 text-center h-4/6 hover:button_colour rounded-md" onClick={e => changeColour(2)} ref={ref3}>January 12th</p>
</div>
{/* {colour[0] !== "" && k(0) && <Images />}
{colour[1] !== "" && k(1) && <Img />}
{colour[2] !== "" && k(2) && <Img />} */}
</div>

);
}

我从'./Images'导入的组件只是具有<img src={<Image_here>} />的组件。

Answer 1

维护activeBtnElement的状态，并在单击特定按钮时更新此activeBtnElement状态。然后应用基于此状态的条件。你也可以使用buttonGroup