Question

我有一个对象：

{
  "products": [
    {
      "id": 1,
      "category": "Milk & meat",
      "products": {
        "product1": ["Name", "Recipe", "Photo"]
        }
    }
}

并且它的映射如下：

return (
    <div className="box list">
    {this.props.products
        .map((product, ind) =>
             <div key={ind}>
                 <h2>{product.category}</h2>
                       {Object.values(product.products).map(name => <li onClick={this.props.handleClickedProduct}>{name[0]}</li>)}
             </div>)}
    </div>
)

onClick方法将产品名称（数组中的[0]）传递给其他组件。就是这样：

handleClickedProduct = (e) => {
    this.setState({ clickedProduct: e.target.innerHTML });
}

我如何从同一个数组中设置状态[1]和[2]？我想传递产品名称并保持食谱和照片的状态。

谢谢，库巴

Answer 1

＆＃13;

class Example extends React.Component {
  products = [
  	{
      id: 1,
      category: "Milk & meat",
      products: {
        product1: ["Name", "Recipe", "Photo"]
        }
  	},
    {
      id: 2,
      category: "Milk & bread",
      products: {
        product1: ["Name", "Recipe", "Photo"]
        }
  }
  ]
  
  state = {
  	clickedProduct: null
  }
  
	handleClick = (product) => (e) => {
		this.props.onClick(product)
  }
  
  render() {
    return (
    	<div className="box list">
        {this.products.map((product, ind) =>
             <div key={ind}>
                 <h2>{product.category}</h2>
                       <ul>
                         {Object.values(product.products)
                          .map(pr => <li onClick={this.handleClick(pr)}>{pr[0]}</li>)}
                       </ul>
             </div>)
             }
       </div>
    )
  }
}

class Handler extends React.Component {
	handler = (e) => {
  	console.log(e)
  }
  
  render () {
  	return <Example onClick={this.handler}/>
  } 
}

ReactDOM.render(
  <Handler />,
  document.getElementById('container')
);

＆＃13;

将handleClickedProduct更改为

handleClickedProduct = (name) => (e) => {
this.setState({ clickedProduct: e.target.innerHTML });}

在地图中，您只需this.handleClickedProduct(product.products)并在handleClickedProduct功能中使用它即可。

React映射数组

1 个答案: