Javascript React,打印数组的状态并在按下按钮时更新状态
我需要在按下其中一个按钮时打印日志数组。当按下其中一个按钮时,如何更新React中的状态并将其打印到屏幕上,而不进行多个打印输出 这应该是一种数据日志,很像控制台,但需要在页面上呈现 到目前为止,其他一切都正常工作,按钮调用将生成结果推送到日志数组的函数Javascript React,打印数组的状态并在按下按钮时更新状态,javascript,reactjs,Javascript,Reactjs,我需要在按下其中一个按钮时打印日志数组。当按下其中一个按钮时,如何更新React中的状态并将其打印到屏幕上,而不进行多个打印输出 这应该是一种数据日志,很像控制台,但需要在页面上呈现 到目前为止,其他一切都正常工作,按钮调用将生成结果推送到日志数组的函数 const desert = [ { content: "Goblin, Cave Bat, Goblin" }, { content: "Ahriman" }, { content: "Desertpede, Desert Sah
const desert = [
{ content: "Goblin, Cave Bat, Goblin" },
{ content: "Ahriman" },
{ content: "Desertpede, Desert Sahagin" },
{ content: "Antlion, Antlion, Antlion" },
{ content: "No Encounter" },
{ content: "No Encounter" },
{ content: "No Encounter" }
];
const forest = [
{ content: "Hindlegs, Axebeak, Hindlegs" },
{ content: "Arachne" },
{ content: "Bood Eye, Flan" },
{ content: "Bomb, Bomb, Bomb" },
{ content: "No Encounter" },
{ content: "No Encounter" },
{ content: "No Encounter" }
];
const goblin = [
{ content: "ATK 1" },
{ content: "ATK 2" },
{ content: "ATK 3" },
{ content: "ATK 4" },
{ content: "ATK 5" },
{ content: "ATK 6" },
{ content: "Miss" }
];
const arachne = [
{ content: "ATK 1" },
{ content: "ATK 2" },
{ content: "ATK 3" },
{ content: "ATK 4" },
{ content: "ATK 5" },
{ content: "ATK 6" },
{ content: "Miss" }
];
const log = [];
class DesertGenerator extends React.Component {
constructor(props) {
super(props);
this.state = {
content: ""
};
this.desertGeneration = this.desertGeneration.bind(this);
}
desertGeneration() {
let number = Math.floor(Math.random() * desert.length);
let generation = desert[number].content;
this.setState({ content: generation });
log.push(generation);
console.log(log);
}
render() {
return (
<DesertButton
handleDesertGeneration={this.desertGeneration}
generation={this.state.content}
/>
);
}
}
class ForestGenerator extends React.Component {
constructor(props) {
super(props);
this.state = {
content: ""
};
this.forestGeneration = this.forestGeneration.bind(this);
}
forestGeneration() {
let number = Math.floor(Math.random() * forest.length);
let generation = forest[number].content;
this.setState({ content: generation });
log.push(generation);
console.log(log);
}
render() {
return (
<ForestButton
handleForestGeneration={this.forestGeneration}
generation={this.state.content}
/>
);
}
}
class GoblinGenerator extends React.Component {
constructor(props) {
super(props);
this.state = {
content: ""
};
this.goblinGeneration = this.goblinGeneration.bind(this);
}
goblinGeneration() {
let number = Math.floor(Math.random() * goblin.length);
let generation = goblin[number].content;
this.setState({ content: generation });
log.push(generation);
console.log(log);
}
render() {
return (
<GoblinButton
handleGoblinGeneration={this.goblinGeneration}
generation={this.state.content}
/>
);
}
}
class ArachneGenerator extends React.Component {
constructor(props) {
super(props);
this.state = {
content: ""
};
this.arachneGeneration = this.arachneGeneration.bind(this);
}
arachneGeneration() {
let number = Math.floor(Math.random() * arachne.length);
let generation = arachne[number].content;
this.setState({ content: generation });
log.push(generation);
console.log(log);
}
render() {
return (
<ArachneButton
handleArachneGeneration={this.arachneGeneration}
generation={this.state.content}
/>
);
}
}
class DesertButton extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<button
type="button"
id="Desert"
className="btn"
onClick={this.props.handleDesertGeneration}
>
Desert
</button>
);
}
}
class ForestButton extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<button
type="button"
id="Forest"
className="btn"
onClick={this.props.handleForestGeneration}
>
Forest
</button>
);
}
}
class GoblinButton extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<button
type="button"
id="Goblin"
className="btn"
onClick={this.props.handleGoblinGeneration}
>
Goblin
</button>
);
}
}
class ArachneButton extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<button
type="button"
id="Arachne"
className="btn"
onClick={this.props.handleArachneGeneration}
>
Arachne
</button>
);
}
}
ReactDOM.render(
<div>
<DesertGenerator />
<ForestGenerator />
<GoblinGenerator />
<ArachneGenerator />
</div>,
document.getElementById("content")
);
const dest=[
{内容:“地精,洞穴蝙蝠,地精”},
{内容:“Ahriman”},
{内容:“沙漠佩德,沙漠萨哈金”},
{内容:“蚁狮,蚁狮,蚁狮”},
{内容:“无遭遇”},
{内容:“无遭遇”},
{内容:“无遭遇”}
];
常数森林=[
{内容:“后腿,斧头,后腿”},
{内容:“蜘蛛网”},
{内容:“Bood-Eye,Flan”},
{内容:“炸弹,炸弹,炸弹”},
{内容:“无遭遇”},
{内容:“无遭遇”},
{内容:“无遭遇”}
];
常量妖精=[
{内容:“ATK 1”},
{内容:“ATK 2”},
{内容:“ATK 3”},
{内容:“ATK 4”},
{内容:“ATK 5”},
{内容:“ATK 6”},
{内容:“小姐”}
];
常数arachne=[
{内容:“ATK 1”},
{内容:“ATK 2”},
{内容:“ATK 3”},
{内容:“ATK 4”},
{内容:“ATK 5”},
{内容:“ATK 6”},
{内容:“小姐”}
];
常量日志=[];
类生成器扩展了React.Component{
建造师(道具){
超级(道具);
此.state={
内容:“”
};
this.desertGeneration=this.desertGeneration.bind(this);
}
沙漠世代(){
设number=Math.floor(Math.random()*desert.length);
让生成=沙漠[number]。内容;
this.setState({content:generation});
日志推送(生成);
console.log(log);
}
render(){
返回(
);
}
}
类ForestGenerator扩展了React.Component{
建造师(道具){
超级(道具);
此.state={
内容:“”
};
this.forestGeneration=this.forestGeneration.bind(this);
}
森林世代(){
设number=Math.floor(Math.random()*forest.length);
let generation=林[number]。内容;
this.setState({content:generation});
日志推送(生成);
console.log(log);
}
render(){
返回(
);
}
}
类生成器扩展了React.Component{
建造师(道具){
超级(道具);
此.state={
内容:“”
};
this.goblinggeneration=this.goblinggeneration.bind(this);
}
GoblingGeneration(){
让number=Math.floor(Math.random()*goblin.length);
让生成=妖精[number]。内容;
this.setState({content:generation});
日志推送(生成);
console.log(log);
}
render(){
返回(
);
}
}
类ArachneGenerator扩展React.Component{
建造师(道具){
超级(道具);
此.state={
内容:“”
};
this.arachenegeneration=this.arachenegeneration.bind(this);
}
蜘蛛生成(){
设number=Math.floor(Math.random()*arachne.length);
let generation=arachne[number]。内容;
this.setState({content:generation});
日志推送(生成);
console.log(log);
}
render(){
返回(
);
}
}
类扩展React.Component{
建造师(道具){
超级(道具);
}
render(){
返回(
沙漠
);
}
}
类ForestButton扩展React.Component{
建造师(道具){
超级(道具);
}
render(){
返回(
森林
);
}
}
类GoblinButton扩展了React.Component{
建造师(道具){
超级(道具);
}
render(){
返回(
妖精
);
}
}
类ArachneButton扩展了React.Component{
建造师(道具){
超级(道具);
}
render(){
返回(
蛛网膜
);
}
}
ReactDOM.render(
,
document.getElementById(“内容”)
);
我不能100%确定您的要求,但我相信这正是您想要的
我减少了很多组件,因为它们是重复的。我还用于确保状态
/属性
声明和使用的一致性(基本上,您不能将字符串
从父级
向下传递,并尝试在子级
中调用它,就好像它是一个函数一样
——字符串仍然是字符串,函数仍然是函数等等——不管它们被传递了多少次)
工作示例:
组件/Content.js
export const content = {
desert: [
"Goblin, Cave Bat, Goblin",
"Ahriman",
"Desertpede, Desert Sahagin",
"Antlion, Antlion, Antlion",
"No Encounter",
"No Encounter",
"No Encounter"
],
forest: [
"Hindlegs, Axebeak, Hindlegs",
"Arachne",
"Bood Eye, Flan",
"Bomb, Bomb, Bomb",
"No Encounter",
"No Encounter",
"No Encounter"
],
goblin: ["ATK 1", "ATK 2", "ATK 3", "ATK 4", "ATK 5", "ATK 6", "Miss"],
arachne: ["ATK 1", "ATK 2", "ATK 3", "ATK 4", "ATK 5", "ATK 6", "Miss"]
};
export const contentTypes = ["desert", "forest", "goblin", "arachne"];
export const logTypes = [
{ title: "Generation Log", type: "generation" },
{ title: "Actions Log", type: "actions" },
{ title: "Actions Log (by type)", type: "actionsByType" }
];
import React, { Component } from "react";
import Generator from "./Generator";
import Logger from "./Logger";
import { content, contentTypes, logTypes } from "./Content";
export default class App extends Component {
state = {
generation: {},
actions: [],
actionsByType: [],
count: 0
};
logGeneration = (id, generation) =>
this.setState(prevState => {
const newCount = prevState.count + 1; // count of action (1, 2, ...etc)
const nextAction = `action${newCount}`; // string used for action property (action1, action2, ...etc)
return {
generation: { ...prevState.generation, [id]: generation }, // spread out previous generation state, add the button's [id] as a property with the selected generation
actions: {
...prevState.actions, // spread out previous actions state
[nextAction]: generation // add the [nextAction] string as a property with the selected generation
},
actionsByType: {
...prevState.actionsByType, // spread out previous actionsByType state
[id]: { ...prevState.actionsByType[id], [nextAction]: generation } // select id (ex: ["forest"]) and spread out previous actionsByType state, and add a [nextAction] property with the selected generation (ex: "action1": "Miss")
},
count: newCount
};
});
render = () => (
<div className="app">
{contentTypes.map(type => ( // map over contentTypes
<Generator
key={type} // type as key
id={type} // type as id
content={content[type]} // type as a content selector
logGeneration={this.logGeneration} // pass down logGeneration method
/>
))}
{logTypes.map(({ type, ...props }) => ( // map over logType, pull out type, put the rest in props
<Logger
{...props} // spread and pass down props
key={type} // use type as key
log={this.state[type]} // use type for selection state (ex: this.state["actions"] || this.state.actions)
/>
))}
</div>
);
}
import React, { PureComponent } from "react";
import PropTypes from "prop-types";
import Button from "../Button";
class Generator extends PureComponent {
handleGeneration = id => {
const number = Math.floor(Math.random() * this.props.content.length); // grab random number between 0-6
const generation = this.props.content[number]; // grab content by index from passed in content array (ex: forest[0-6])
this.props.logGeneration(id, generation); // pass back id and generation to the log method
};
render = () => (
<Button id={this.props.id} onHandleClick={this.handleGeneration}>
{this.props.id}
</Button>
);
}
export default Generator;
Generator.propTypes = {
logGeneration: PropTypes.func.isRequired,
id: PropTypes.string.isRequired,
content: PropTypes.arrayOf(PropTypes.string).isRequired
};
import React from "react";
import PropTypes from "prop-types";
const Button = ({ children, id, onHandleClick }) => (
<div className="button-container">
<button
type="button"
className="btn btn-primary"
onClick={() => onHandleClick(id)} // pass back id on button click (ex: "forest")
>
{children}
</button>
</div>
);
export default Button;
Button.propTypes = {
children: PropTypes.string.isRequired,
id: PropTypes.string.isRequired,
onHandleClick: PropTypes.func.isRequired
};
import isEmpty from "lodash/isEmpty";
import React from "react";
import PropTypes from "prop-types";
const Logger = ({ log, title }) =>
!isEmpty(log) ? ( // if the log isn't empty...
<div className="logger-container"> // show log
<h1 style={{ textAlign: "center " }}>{title}</h1>
<div className="log">
<pre>
<code>{JSON.stringify(log, null, 4)}</code>
</pre>
</div>
</div>
) : null; // else show nothing
export default Logger;
Logger.propTypes = {
log: PropTypes.oneOfType([
PropTypes.objectOf(PropTypes.string),
PropTypes.arrayOf(PropTypes.string),
PropTypes.objectOf(PropTypes.objectOf(PropTypes.string))
]),
title: PropTypes.string.isRequired
};
组件/App.js
export const content = {
desert: [
"Goblin, Cave Bat, Goblin",
"Ahriman",
"Desertpede, Desert Sahagin",
"Antlion, Antlion, Antlion",
"No Encounter",
"No Encounter",
"No Encounter"
],
forest: [
"Hindlegs, Axebeak, Hindlegs",
"Arachne",
"Bood Eye, Flan",
"Bomb, Bomb, Bomb",
"No Encounter",
"No Encounter",
"No Encounter"
],
goblin: ["ATK 1", "ATK 2", "ATK 3", "ATK 4", "ATK 5", "ATK 6", "Miss"],
arachne: ["ATK 1", "ATK 2", "ATK 3", "ATK 4", "ATK 5", "ATK 6", "Miss"]
};
export const contentTypes = ["desert", "forest", "goblin", "arachne"];
export const logTypes = [
{ title: "Generation Log", type: "generation" },
{ title: "Actions Log", type: "actions" },
{ title: "Actions Log (by type)", type: "actionsByType" }
];
import React, { Component } from "react";
import Generator from "./Generator";
import Logger from "./Logger";
import { content, contentTypes, logTypes } from "./Content";
export default class App extends Component {
state = {
generation: {},
actions: [],
actionsByType: [],
count: 0
};
logGeneration = (id, generation) =>
this.setState(prevState => {
const newCount = prevState.count + 1; // count of action (1, 2, ...etc)
const nextAction = `action${newCount}`; // string used for action property (action1, action2, ...etc)
return {
generation: { ...prevState.generation, [id]: generation }, // spread out previous generation state, add the button's [id] as a property with the selected generation
actions: {
...prevState.actions, // spread out previous actions state
[nextAction]: generation // add the [nextAction] string as a property with the selected generation
},
actionsByType: {
...prevState.actionsByType, // spread out previous actionsByType state
[id]: { ...prevState.actionsByType[id], [nextAction]: generation } // select id (ex: ["forest"]) and spread out previous actionsByType state, and add a [nextAction] property with the selected generation (ex: "action1": "Miss")
},
count: newCount
};
});
render = () => (
<div className="app">
{contentTypes.map(type => ( // map over contentTypes
<Generator
key={type} // type as key
id={type} // type as id
content={content[type]} // type as a content selector
logGeneration={this.logGeneration} // pass down logGeneration method
/>
))}
{logTypes.map(({ type, ...props }) => ( // map over logType, pull out type, put the rest in props
<Logger
{...props} // spread and pass down props
key={type} // use type as key
log={this.state[type]} // use type for selection state (ex: this.state["actions"] || this.state.actions)
/>
))}
</div>
);
}
import React, { PureComponent } from "react";
import PropTypes from "prop-types";
import Button from "../Button";
class Generator extends PureComponent {
handleGeneration = id => {
const number = Math.floor(Math.random() * this.props.content.length); // grab random number between 0-6
const generation = this.props.content[number]; // grab content by index from passed in content array (ex: forest[0-6])
this.props.logGeneration(id, generation); // pass back id and generation to the log method
};
render = () => (
<Button id={this.props.id} onHandleClick={this.handleGeneration}>
{this.props.id}
</Button>
);
}
export default Generator;
Generator.propTypes = {
logGeneration: PropTypes.func.isRequired,
id: PropTypes.string.isRequired,
content: PropTypes.arrayOf(PropTypes.string).isRequired
};
import React from "react";
import PropTypes from "prop-types";
const Button = ({ children, id, onHandleClick }) => (
<div className="button-container">
<button
type="button"
className="btn btn-primary"
onClick={() => onHandleClick(id)} // pass back id on button click (ex: "forest")
>
{children}
</button>
</div>
);
export default Button;
Button.propTypes = {
children: PropTypes.string.isRequired,
id: PropTypes.string.isRequired,
onHandleClick: PropTypes.func.isRequired
};
import isEmpty from "lodash/isEmpty";
import React from "react";
import PropTypes from "prop-types";
const Logger = ({ log, title }) =>
!isEmpty(log) ? ( // if the log isn't empty...
<div className="logger-container"> // show log
<h1 style={{ textAlign: "center " }}>{title}</h1>
<div className="log">
<pre>
<code>{JSON.stringify(log, null, 4)}</code>
</pre>
</div>
</div>
) : null; // else show nothing
export default Logger;
Logger.propTypes = {
log: PropTypes.oneOfType([
PropTypes.objectOf(PropTypes.string),
PropTypes.arrayOf(PropTypes.string),
PropTypes.objectOf(PropTypes.objectOf(PropTypes.string))
]),
title: PropTypes.string.isRequired
};
):null;//否则什么也不显示
导出默认记录器;
Logger.propTypes={
日志:PropTypes.oneOfType([
PropTypes.objectOf(PropTypes.string),
PropTypes.arrayOf(PropTypes.string),
PropTypes.objectOf(PropTypes.objectOf(PropTypes.string))
]),
标题:PropTypes.string.isRequired
};
谢谢您的帮助!我一定会看的!没问题。这是一个很大的问题,所以如果你有任何问题,请随时提问。