我正在React中构建一个应用程序,该应用程序已连接到我之前编写的API。按钮正在渲染,但它们都同时更改。我需要有关如何编写代码以分离功能的建议。
我的应用程序使用.map呈现与约会相同数量的按钮,而约会是一个数组。当this.state.shown更改时,所有这些按钮都会更改,但是我需要分开所有按钮才能只显示我单击的按钮。现在,当我单击其中之一时,this.state.shown会更改其值,因此所有按钮都会更改,因为所有按钮都依赖于同一变量。我正在寻找有关如何将其分开的建议。
class AppointmentsList extends Component {
constructor(props) {
super(props);
this.state = {
appointments: [],
isLoading: false,
shown: false, //Variable to know if a button need to change and render the component
customerUp: false
}
this.toggleCustomer = this.toggleCustomer.bind(this);
//this.showCustomer = this.showCustomer.bind(this);
}
toggleCustomer() {
this.setState({
shown: !this.state.shown
})
} //This function change the value of shown when a Button is clicked.
render() {
const {appointments, isLoading} = this.state;
if(isLoading) {
return <p>Loading...</p>;
}
return(
<div>
<h2>Lista de citas</h2>
{appointments.map((app) =>
<div key={app.id}>
<p>Fecha: {app.appointment}</p>
<p>Cliente: {app.customer.name}</p>
<p>Id: {app.customer.id}</p>
{ this.state.shown ? <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer() }>Ocultar cliente</Button> : <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer() }>Ver cliente</Button> }
{ this.state.shown ? <CustomerView id={app.customer.id} /> : null }
</div>
)}
</div>
)
}
如何重新组织代码以分别呈现按钮?
谢谢。
答案 0 :(得分:0)
您可以在 AppointmentsList 组件内为按钮(buttonComponent
)创建单独的组件,并传递显示的道具和componentDidMount
中buttonComponent
的内容将道具复制到 buttonComponent 的状态。
这样,每个按钮将具有自己的状态,该状态管理shown
。
按钮组件:
import react from 'react';
interface buttonComponentProps{
shown: boolean;
}
interface buttonComponentState{
shown: boolean;
}
class buttonComponent extends react.Component<buttonComponentProps,{}>{
constructor(props:buttonComponentProps){
super();
this.state{
shown:props.shown
}
}
....
}
export default buttonComponent;
答案 1 :(得分:0)
方法1:您可以使显示状态成为类似以下对象的对象:
state = {
shown:{}
}
toggleCustomer(id) {
const updatedShownState = {...this.state.shown};
updatedShownState[id] = updatedShownState[id] ? false : true;
this.setState({
shown: updatedShownState,
})
} //This function change the value of shown when a Button is clicked.
render() {
const {appointments, isLoading} = this.state;
if(isLoading) {
return <p>Loading...</p>;
}
return(
<div>
<h2>Lista de citas</h2>
{appointments.map((app) =>
<div key={app.id}>
<p>Fecha: {app.appointment}</p>
<p>Cliente: {app.customer.name}</p>
<p>Id: {app.customer.id}</p>
{ this.state.shown[app.customer.id] ? <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer(app.customer.id) }>Ocultar cliente</Button> : <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer() }>Ver cliente</Button> }
{ this.state.shown[app.customer.id] ? <CustomerView id={app.customer.id} /> : null }
</div>
)}
</div>
)
}
方法2:为Button和Customer创建单独的组件
return(
<div>
<h2>Lista de citas</h2>
{appointments.map((app) =>
<Appointment key = {app.id} app = {app} />
)}
</div>
)
}
class Appointment extends Component {
state = {
shown: false,
}
toggleCustomer() {
this.setState({
shown: !this.state.shown
})
}
render() {
const { app } = this.props;
return (
<div key={app.id}>
<p>Fecha: {app.appointment}</p>
<p>Cliente: {app.customer.name}</p>
<p>Id: {app.customer.id}</p>
{ this.state.shown ? <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer() }>Ocultar cliente</Button> : <Button key={app.customer.id} color="danger" onClick={() => this.toggleCustomer() }>Ver cliente</Button> }
{ this.state.shown ? <CustomerView id={app.customer.id} /> : null }
</div>
)
}
}
让我知道它是否有效以及您喜欢的方法。