我试图在通过 React Route（重定向到）重定向​​到路由时发送props，但组件（SideBar）没有收到任何props。我应该如何发送props以及如何在组件中接收props？我想从当前状态发送一个props。

父组件 (WelcomeScreen.tsx)

render(){

    return (  
        this.state.idUser != -1 ?  <Redirect to={{
            pathname: '/Activities',
            state: { referrer: this.state.idUser }
            }}/> :   
        <div>
            {this.renderHeader()}
            <div className='screenUser'>
                {this.renderPanelUpButtons()}
                {this.renderWelcomeMenu()}
            </div>
        </div>

    );

活动.tsx

export interface ActivitiesProps {
idUser: number;
}

interface ActivitiesState {  
message: string;
activitiesFirstPart: IActivity[];
activitiesSecondPart: IActivity[];
}

componentWillReceiveProps(newprops : ActivitiesProps){
    if(newprops!== this.props){
        this.props = newprops;
    }

}

这里组件不会收到任何props。

为了更容易理解，我还列出了路线；

render() {
    return (
        <div className="hangouts-body">
            <div>
                <Route path="/" exact={true} component={WelcomeScreen} />
                <Route path="/Groups" exact={true} component={Groups} />
                <Route path="/Activities" exact={true} component={Activities} />
                <Route path="/OneActivity" exact={true} component={OneActivity} />
            </div>
        </div>
    );
}