[英]How to transfer an image to another component using Redux?
我已經設置了Redux以從網上商店捕獲用戶選擇(項目,大小,價格),並將其發送到另一個Cart
組件。 這可以正常工作,但是我想捕獲項目的圖像並將其發送到Cart
。 您可以在其中將商品添加到購物車的每個產品頁面中,我還希望隨用戶選擇發送一張圖像。 這是產品頁面組件的示例:
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { addCart } from '../../actions';
import SeltzShirt from './seltzshirt.jpg';
import Slideone from './slideSeltzOne';
import Slidetwo from './slideSeltzTwo';
import RightArrow from './rightarrow';
import LeftArrow from './leftarrow';
export class ProductPage3 extends Component {
constructor(props) {
super(props);
this.state = {
slideCount: 1,
value: 'medium', cartData: {}
}
this.nextSlide = this.nextSlide.bind(this);
this.previousSlide = this.previousSlide.bind(this);
this.handleClick = this.handleClick.bind(this);
this.change = this.change.bind(this);
}
handleClick() {
let cart = {price:25,item:this.description.innerHTML,size:this.state.value};
this.props.onCartAdd(cart);
console.log(cart);
this.itemSelection(cart);
}
...
componentDidMount () {
window.scrollTo(0, 0)
}
render() {
return (
<div className= "ProductPage" id="ProductPage">
<div id='slider'>
{this.state.slideCount === 1 ? <Slideone /> : null}
{this.state.slideCount === 2 ? <Slidetwo /> : null}
<RightArrow nextSlide={this.nextSlide} />
<LeftArrow previousSlide={this.previousSlide} />
</div>
<div id='InfoSquare'>
<div id='wrapper'>
<div id='item' ref={i=>this.description=i}>LOGO TEE</div>
<div id='description'>Black tee 100% cotton with red silkscreened logo on front and back.</div>
<select id="size2" onChange={this.change} value={this.state.value}>
<option value="medium">Medium</option>
<option value="large">Large</option>
<option value="x-large">X-large</option>
</select>
<button onClick={this.handleClick} className="addit">ADD TO CART</button>
</div>
</div>
</div>
);
}
nextSlide() {
this.setState({ slideCount: this.state.slideCount + 1 })
}
previousSlide() {
this.setState({ slideCount: this.state.slideCount - 1 })
}
}
const mapDispatchToProps = (dispatch) => {
return {
onCartAdd: (cart) => {
dispatch(addCart(cart));
},
}
}
function mapStateToProps(state) {
return {
cart: state.cart
};
}
export default connect(mapStateToProps,mapDispatchToProps)(ProductPage3);
這是我的Cart
組件:
import React, { Component } from 'react';
import {addCart} from './Shop';
import { removeCart } from '../../actions';
import { connect } from 'react-redux';
export class Cart extends Component {
constructor(props) {
super(props);
this.state = {items: this.props.cart,cart: [],total: 0};
}
...
render() {
return(
<div className= "Webcart" id="Webcart">
<div id='WebcartWrapper'>
<ul id='webCartList'>
{this.state.items.map((item, index) => {
return <li className='cartItems' key={'cartItems_'+index}>
<h4>{item.item}</h4>
<p>Size: {item.size}</p>
<p>Price: {item.price}</p>
<button onClick={() => this.handleClick(item)}>Remove</button>
</li>
})}
</ul>
<div>Total: ${this.countTotal()}</div>
</div>
</div>
);
}
}
const mapDispatchToProps = (dispatch) => {
return {
onCartAdd: (cart) => {
dispatch(addCart(cart));
},
onCartRemove: (item) => {
dispatch(removeCart(item));
},
}
}
function mapStateToProps(state) {
return { cart: state.cart };
}
export default connect(mapStateToProps, mapDispatchToProps)(Cart);
在Cart
我正在渲染添加到購物車中的每個對象的項目選擇數據。 這也是我要顯示項目圖像的地方。
由於我設置了圖像滑塊,因此其中一張幻燈片的示例為:
import React, { Component } from 'react';
import take1 from './DETAIL.png';
const SlideNocHOne= (props) => {
return <img src= {take1} id="slide"></img>
}
export default SlideNocHOne;
假設我要把這個DETAIL.png
圖片放到Cart
DETAIL.png
,如何通過Redux與用戶選擇一起轉移它?
這些是我的Redux組件:
import { createStore, applyMiddleware, compose } from 'redux';
import { persistStore, autoRehydrate } from 'redux-persist';
import reducer from './reducers';
import thunkMiddleware from 'redux-thunk';
import {createLogger} from 'redux-logger';
const store = createStore(
reducer,
undefined,
compose(
applyMiddleware(createLogger(), thunkMiddleware),
autoRehydrate()
)
);
persistStore(store, {whitelist: ['cart']});
export default store;
import {ADD_CART} from './actions';
import {REMOVE_CART} from './actions';
import { REHYDRATE } from 'redux-persist/constants';
export default Reducer;
var initialState = {
cart:{},
data: [],
url: "/api/comments",
pollInterval: 2000
};
function Reducer(state = initialState, action){
switch(action.type){
case REHYDRATE:
if (action.payload && action.payload.cart) {
return { ...state, ...action.payload.cart };
}
return state;
case ADD_CART:
return {
...state,
cart: [...state.cart, action.payload]
}
case REMOVE_CART:
return {
...state,
cart: state.cart.filter((item) => action.payload !== item)
}
default:
return state;
};
}
export const ADD_CART = 'ADD_CART';
export const REMOVE_CART = 'REMOVE_CART';
export function addCart(item){
return {
type: ADD_CART,
payload: item
}
};
export function removeCart(item){
return{
type:REMOVE_CART,
payload: item
}
};
如何使用Redux設置將用戶選擇的圖像傳輸到Cart
?
如果組件的路徑相對穩定,並且圖像具有單個位置,則可以簡單地使用一個函數,該函數采用組件的displayName
(在您的示例中為Cart
等),然后將相對路徑返回圖像目錄。
如果有的話,您可以將鍵/值集合保存在化簡器中以獲取每個組件應具有的圖像,例如:
{
CartComponent: ['DETAIL.png', 'DETAIL_2.png']
...
}
租用時,只需使用mapper函數即可,這將為您提供相對路徑。 諸如此類(或您可以映射出該數組):
const relativeImagePath = getRelativeImageDirPathByCompName('CartComponent') + this.props.images.CartComponent[0];
使用require
來獲取模板中的圖像,例如:
<img src={require(relativeImagePath)} alt="Something"/>
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